/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 10:03:42,074 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 10:03:42,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 10:03:42,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 10:03:42,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 10:03:42,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 10:03:42,112 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 10:03:42,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 10:03:42,121 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 10:03:42,125 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 10:03:42,126 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 10:03:42,128 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 10:03:42,128 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 10:03:42,131 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 10:03:42,132 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 10:03:42,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 10:03:42,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 10:03:42,134 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 10:03:42,136 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 10:03:42,140 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 10:03:42,141 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 10:03:42,142 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 10:03:42,143 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 10:03:42,145 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 10:03:42,152 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 10:03:42,152 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 10:03:42,152 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 10:03:42,153 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 10:03:42,154 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 10:03:42,154 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 10:03:42,155 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 10:03:42,155 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 10:03:42,156 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 10:03:42,157 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 10:03:42,158 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 10:03:42,158 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 10:03:42,158 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 10:03:42,159 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 10:03:42,159 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 10:03:42,159 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 10:03:42,160 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 10:03:42,161 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-28 10:03:42,192 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 10:03:42,192 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 10:03:42,193 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 10:03:42,193 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 10:03:42,194 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 10:03:42,194 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 10:03:42,194 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 10:03:42,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 10:03:42,194 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 10:03:42,195 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 10:03:42,195 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 10:03:42,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 10:03:42,196 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 10:03:42,196 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 10:03:42,196 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 10:03:42,196 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 10:03:42,196 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 10:03:42,196 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 10:03:42,196 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 10:03:42,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 10:03:42,196 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 10:03:42,197 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 10:03:42,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 10:03:42,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 10:03:42,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 10:03:42,197 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 10:03:42,197 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 10:03:42,197 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 10:03:42,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 10:03:42,198 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 10:03:42,198 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 10:03:42,198 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 10:03:42,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 10:03:42,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 10:03:42,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 10:03:42,447 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 10:03:42,447 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 10:03:42,448 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2023-01-28 10:03:43,498 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 10:03:43,645 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 10:03:43,646 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2023-01-28 10:03:43,651 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df5ffc841/f9b4258c1744408a9caa4541467491b1/FLAGd93e2fe37 [2023-01-28 10:03:43,663 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df5ffc841/f9b4258c1744408a9caa4541467491b1 [2023-01-28 10:03:43,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 10:03:43,667 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 10:03:43,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 10:03:43,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 10:03:43,670 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 10:03:43,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 10:03:43" (1/1) ... [2023-01-28 10:03:43,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8cd9ede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:03:43, skipping insertion in model container [2023-01-28 10:03:43,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 10:03:43" (1/1) ... [2023-01-28 10:03:43,678 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 10:03:43,691 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 10:03:43,825 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2023-01-28 10:03:43,834 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 10:03:43,843 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 10:03:43,875 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2023-01-28 10:03:43,879 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 10:03:43,890 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 10:03:43,891 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 10:03:43,896 INFO L208 MainTranslator]: Completed translation [2023-01-28 10:03:43,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:03:43 WrapperNode [2023-01-28 10:03:43,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 10:03:43,898 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 10:03:43,898 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 10:03:43,899 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 10:03:43,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:03:43" (1/1) ... [2023-01-28 10:03:43,918 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:03:43" (1/1) ... [2023-01-28 10:03:43,946 INFO L138 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 140 [2023-01-28 10:03:43,946 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 10:03:43,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 10:03:43,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 10:03:43,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 10:03:43,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:03:43" (1/1) ... [2023-01-28 10:03:43,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:03:43" (1/1) ... [2023-01-28 10:03:43,958 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:03:43" (1/1) ... [2023-01-28 10:03:43,959 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:03:43" (1/1) ... [2023-01-28 10:03:43,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:03:43" (1/1) ... [2023-01-28 10:03:43,966 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:03:43" (1/1) ... [2023-01-28 10:03:43,967 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:03:43" (1/1) ... [2023-01-28 10:03:43,968 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:03:43" (1/1) ... [2023-01-28 10:03:43,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 10:03:43,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 10:03:43,971 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 10:03:43,971 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 10:03:43,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:03:43" (1/1) ... [2023-01-28 10:03:43,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 10:03:43,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:03:43,997 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-28 10:03:44,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-28 10:03:44,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 10:03:44,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 10:03:44,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 10:03:44,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 10:03:44,041 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 10:03:44,041 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 10:03:44,042 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 10:03:44,042 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 10:03:44,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 10:03:44,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 10:03:44,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 10:03:44,042 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 10:03:44,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 10:03:44,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 10:03:44,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 10:03:44,044 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 10:03:44,156 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 10:03:44,157 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 10:03:44,457 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 10:03:44,557 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 10:03:44,557 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-28 10:03:44,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 10:03:44 BoogieIcfgContainer [2023-01-28 10:03:44,560 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 10:03:44,562 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 10:03:44,562 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 10:03:44,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 10:03:44,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 10:03:43" (1/3) ... [2023-01-28 10:03:44,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@192b7770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 10:03:44, skipping insertion in model container [2023-01-28 10:03:44,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:03:43" (2/3) ... [2023-01-28 10:03:44,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@192b7770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 10:03:44, skipping insertion in model container [2023-01-28 10:03:44,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 10:03:44" (3/3) ... [2023-01-28 10:03:44,567 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2023-01-28 10:03:44,579 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 10:03:44,580 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 10:03:44,580 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 10:03:44,633 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 10:03:44,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 109 transitions, 234 flow [2023-01-28 10:03:44,717 INFO L130 PetriNetUnfolder]: 9/107 cut-off events. [2023-01-28 10:03:44,717 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 10:03:44,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 107 events. 9/107 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 74. Up to 2 conditions per place. [2023-01-28 10:03:44,721 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 109 transitions, 234 flow [2023-01-28 10:03:44,724 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 99 transitions, 210 flow [2023-01-28 10:03:44,727 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 10:03:44,735 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 97 places, 99 transitions, 210 flow [2023-01-28 10:03:44,737 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 97 places, 99 transitions, 210 flow [2023-01-28 10:03:44,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 99 transitions, 210 flow [2023-01-28 10:03:44,759 INFO L130 PetriNetUnfolder]: 9/99 cut-off events. [2023-01-28 10:03:44,759 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 10:03:44,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 99 events. 9/99 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 65 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 74. Up to 2 conditions per place. [2023-01-28 10:03:44,761 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2023-01-28 10:03:48,158 INFO L134 LiptonReduction]: Checked pairs total: 585 [2023-01-28 10:03:48,158 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-01-28 10:03:48,171 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 10:03:48,176 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;@2d8c7702, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 10:03:48,177 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 10:03:48,183 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-01-28 10:03:48,183 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 10:03:48,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:03:48,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:03:48,184 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:03:48,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:03:48,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1648247353, now seen corresponding path program 1 times [2023-01-28 10:03:48,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:03:48,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518578994] [2023-01-28 10:03:48,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:03:48,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:03:48,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:03:48,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:03:48,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:03:48,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518578994] [2023-01-28 10:03:48,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518578994] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:03:48,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:03:48,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 10:03:48,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366991469] [2023-01-28 10:03:48,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:03:48,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 10:03:48,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:03:48,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 10:03:48,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 10:03:48,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 206 [2023-01-28 10:03:48,587 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:48,588 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:03:48,588 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 206 [2023-01-28 10:03:48,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:03:48,650 INFO L130 PetriNetUnfolder]: 66/116 cut-off events. [2023-01-28 10:03:48,650 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-01-28 10:03:48,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 116 events. 66/116 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 324 event pairs, 9 based on Foata normal form. 1/76 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2023-01-28 10:03:48,652 INFO L137 encePairwiseOnDemand]: 202/206 looper letters, 21 selfloop transitions, 3 changer transitions 1/27 dead transitions. [2023-01-28 10:03:48,653 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 27 transitions, 125 flow [2023-01-28 10:03:48,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 10:03:48,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 10:03:48,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 308 transitions. [2023-01-28 10:03:48,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49838187702265374 [2023-01-28 10:03:48,666 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 308 transitions. [2023-01-28 10:03:48,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 308 transitions. [2023-01-28 10:03:48,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:03:48,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 308 transitions. [2023-01-28 10:03:48,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:48,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:48,677 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:48,679 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 308 transitions. [2023-01-28 10:03:48,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 27 transitions, 125 flow [2023-01-28 10:03:48,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 27 transitions, 111 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 10:03:48,683 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2023-01-28 10:03:48,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, 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=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2023-01-28 10:03:48,687 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-01-28 10:03:48,688 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2023-01-28 10:03:48,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:48,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:03:48,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:03:48,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 10:03:48,689 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:03:48,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:03:48,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1272507108, now seen corresponding path program 1 times [2023-01-28 10:03:48,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:03:48,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636594717] [2023-01-28 10:03:48,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:03:48,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:03:48,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:03:48,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:03:48,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:03:48,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636594717] [2023-01-28 10:03:48,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636594717] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:03:48,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:03:48,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 10:03:48,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174571321] [2023-01-28 10:03:48,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:03:48,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 10:03:48,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:03:48,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 10:03:48,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 10:03:48,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-28 10:03:48,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 5 states, 5 states have (on average 77.8) internal successors, (389), 5 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:48,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:03:48,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-28 10:03:48,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:03:49,018 INFO L130 PetriNetUnfolder]: 113/217 cut-off events. [2023-01-28 10:03:49,019 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2023-01-28 10:03:49,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 217 events. 113/217 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 819 event pairs, 48 based on Foata normal form. 12/227 useless extension candidates. Maximal degree in co-relation 168. Up to 122 conditions per place. [2023-01-28 10:03:49,021 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 35 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2023-01-28 10:03:49,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 194 flow [2023-01-28 10:03:49,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 10:03:49,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 10:03:49,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 411 transitions. [2023-01-28 10:03:49,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3990291262135922 [2023-01-28 10:03:49,024 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 411 transitions. [2023-01-28 10:03:49,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 411 transitions. [2023-01-28 10:03:49,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:03:49,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 411 transitions. [2023-01-28 10:03:49,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.2) internal successors, (411), 5 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:49,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:49,029 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:49,029 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 5 states and 411 transitions. [2023-01-28 10:03:49,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 194 flow [2023-01-28 10:03:49,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 10:03:49,031 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 84 flow [2023-01-28 10:03:49,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=84, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-01-28 10:03:49,032 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-01-28 10:03:49,032 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 84 flow [2023-01-28 10:03:49,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 77.8) internal successors, (389), 5 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:49,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:03:49,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:03:49,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 10:03:49,033 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:03:49,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:03:49,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1514912191, now seen corresponding path program 1 times [2023-01-28 10:03:49,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:03:49,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747596227] [2023-01-28 10:03:49,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:03:49,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:03:49,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:03:49,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:03:49,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:03:49,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747596227] [2023-01-28 10:03:49,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747596227] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:03:49,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:03:49,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 10:03:49,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775512130] [2023-01-28 10:03:49,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:03:49,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 10:03:49,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:03:49,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 10:03:49,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 10:03:49,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-28 10:03:49,130 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 77.8) internal successors, (389), 5 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:49,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:03:49,131 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-28 10:03:49,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:03:49,233 INFO L130 PetriNetUnfolder]: 79/161 cut-off events. [2023-01-28 10:03:49,233 INFO L131 PetriNetUnfolder]: For 65/70 co-relation queries the response was YES. [2023-01-28 10:03:49,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402 conditions, 161 events. 79/161 cut-off events. For 65/70 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 542 event pairs, 40 based on Foata normal form. 11/170 useless extension candidates. Maximal degree in co-relation 300. Up to 116 conditions per place. [2023-01-28 10:03:49,235 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 17 selfloop transitions, 2 changer transitions 16/36 dead transitions. [2023-01-28 10:03:49,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 36 transitions, 185 flow [2023-01-28 10:03:49,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 10:03:49,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 10:03:49,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 408 transitions. [2023-01-28 10:03:49,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39611650485436894 [2023-01-28 10:03:49,237 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 408 transitions. [2023-01-28 10:03:49,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 408 transitions. [2023-01-28 10:03:49,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:03:49,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 408 transitions. [2023-01-28 10:03:49,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 81.6) internal successors, (408), 5 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:49,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:49,241 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:49,241 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 84 flow. Second operand 5 states and 408 transitions. [2023-01-28 10:03:49,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 36 transitions, 185 flow [2023-01-28 10:03:49,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 36 transitions, 179 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-01-28 10:03:49,243 INFO L231 Difference]: Finished difference. Result has 31 places, 20 transitions, 74 flow [2023-01-28 10:03:49,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=78, 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=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=74, PETRI_PLACES=31, PETRI_TRANSITIONS=20} [2023-01-28 10:03:49,244 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-01-28 10:03:49,244 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 20 transitions, 74 flow [2023-01-28 10:03:49,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 77.8) internal successors, (389), 5 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:49,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:03:49,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:03:49,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 10:03:49,245 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:03:49,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:03:49,246 INFO L85 PathProgramCache]: Analyzing trace with hash 818882596, now seen corresponding path program 1 times [2023-01-28 10:03:49,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:03:49,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287605416] [2023-01-28 10:03:49,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:03:49,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:03:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:03:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:03:49,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:03:49,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287605416] [2023-01-28 10:03:49,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287605416] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:03:49,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820136021] [2023-01-28 10:03:49,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:03:49,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:03:49,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:03:49,387 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:03:49,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 10:03:49,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:03:49,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:03:49,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:03:49,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:03:49,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:03:49,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:03:49,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820136021] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 10:03:49,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 10:03:49,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-01-28 10:03:49,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21960966] [2023-01-28 10:03:49,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:03:49,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 10:03:49,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:03:49,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 10:03:49,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-01-28 10:03:49,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-28 10:03:49,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 20 transitions, 74 flow. Second operand has 5 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:49,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:03:49,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-28 10:03:49,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:03:49,640 INFO L130 PetriNetUnfolder]: 68/122 cut-off events. [2023-01-28 10:03:49,641 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2023-01-28 10:03:49,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 122 events. 68/122 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 350 event pairs, 23 based on Foata normal form. 12/133 useless extension candidates. Maximal degree in co-relation 312. Up to 92 conditions per place. [2023-01-28 10:03:49,642 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 21 selfloop transitions, 5 changer transitions 0/27 dead transitions. [2023-01-28 10:03:49,642 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 149 flow [2023-01-28 10:03:49,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 10:03:49,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 10:03:49,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 399 transitions. [2023-01-28 10:03:49,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38737864077669903 [2023-01-28 10:03:49,655 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 399 transitions. [2023-01-28 10:03:49,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 399 transitions. [2023-01-28 10:03:49,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:03:49,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 399 transitions. [2023-01-28 10:03:49,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 79.8) internal successors, (399), 5 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:49,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:49,659 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:49,659 INFO L175 Difference]: Start difference. First operand has 31 places, 20 transitions, 74 flow. Second operand 5 states and 399 transitions. [2023-01-28 10:03:49,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 149 flow [2023-01-28 10:03:49,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 27 transitions, 133 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-01-28 10:03:49,661 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 81 flow [2023-01-28 10:03:49,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=81, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2023-01-28 10:03:49,661 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-01-28 10:03:49,661 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 81 flow [2023-01-28 10:03:49,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:49,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:03:49,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:03:49,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 10:03:49,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:03:49,878 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:03:49,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:03:49,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1062328821, now seen corresponding path program 1 times [2023-01-28 10:03:49,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:03:49,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003740047] [2023-01-28 10:03:49,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:03:49,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:03:49,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:03:49,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:03:49,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:03:49,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003740047] [2023-01-28 10:03:49,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003740047] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:03:49,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817346684] [2023-01-28 10:03:49,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:03:49,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:03:49,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:03:49,977 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:03:50,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 10:03:50,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:03:50,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:03:50,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:03:50,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:03:50,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:03:50,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:03:50,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817346684] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 10:03:50,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 10:03:50,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-01-28 10:03:50,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452146345] [2023-01-28 10:03:50,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:03:50,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 10:03:50,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:03:50,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 10:03:50,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-01-28 10:03:50,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-28 10:03:50,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 81 flow. Second operand has 5 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:50,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:03:50,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-28 10:03:50,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:03:50,197 INFO L130 PetriNetUnfolder]: 52/97 cut-off events. [2023-01-28 10:03:50,197 INFO L131 PetriNetUnfolder]: For 59/66 co-relation queries the response was YES. [2023-01-28 10:03:50,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 97 events. 52/97 cut-off events. For 59/66 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 220 event pairs, 20 based on Foata normal form. 15/108 useless extension candidates. Maximal degree in co-relation 267. Up to 75 conditions per place. [2023-01-28 10:03:50,200 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 22 selfloop transitions, 5 changer transitions 0/28 dead transitions. [2023-01-28 10:03:50,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 28 transitions, 163 flow [2023-01-28 10:03:50,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 10:03:50,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 10:03:50,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 399 transitions. [2023-01-28 10:03:50,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38737864077669903 [2023-01-28 10:03:50,202 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 399 transitions. [2023-01-28 10:03:50,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 399 transitions. [2023-01-28 10:03:50,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:03:50,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 399 transitions. [2023-01-28 10:03:50,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 79.8) internal successors, (399), 5 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:50,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:50,207 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:50,207 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 81 flow. Second operand 5 states and 399 transitions. [2023-01-28 10:03:50,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 28 transitions, 163 flow [2023-01-28 10:03:50,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 28 transitions, 149 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-01-28 10:03:50,210 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 91 flow [2023-01-28 10:03:50,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-01-28 10:03:50,212 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2023-01-28 10:03:50,214 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 91 flow [2023-01-28 10:03:50,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:50,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:03:50,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:03:50,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 10:03:50,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:03:50,422 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:03:50,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:03:50,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1690720491, now seen corresponding path program 1 times [2023-01-28 10:03:50,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:03:50,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339150608] [2023-01-28 10:03:50,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:03:50,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:03:50,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:03:50,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:03:50,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:03:50,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339150608] [2023-01-28 10:03:50,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339150608] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:03:50,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605626545] [2023-01-28 10:03:50,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:03:50,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:03:50,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:03:50,893 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:03:50,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 10:03:51,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:03:51,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 54 conjunts are in the unsatisfiable core [2023-01-28 10:03:51,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:03:51,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 10:03:51,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 10:03:51,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:03:51,186 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 [2023-01-28 10:03:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:03:51,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:03:51,314 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_133 (Array Int Int))) (<= c_~counter~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset))) (forall ((v_ArrVal_133 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset) (+ c_~counter~0 1)))) is different from false [2023-01-28 10:03:51,341 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))))) (and (forall ((v_ArrVal_133 (Array Int Int))) (<= (+ .cse0 c_~counter~0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset))) (forall ((v_ArrVal_133 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset) (+ .cse0 c_~counter~0 1))))) is different from false [2023-01-28 10:03:51,353 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset))) (and (forall ((v_ArrVal_133 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset) (+ .cse0 c_~counter~0 1))) (forall ((v_ArrVal_133 (Array Int Int))) (<= (+ .cse0 c_~counter~0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset))))) is different from false [2023-01-28 10:03:51,372 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_133 (Array Int Int)) (v_ArrVal_132 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_132))) (<= (+ c_~counter~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (forall ((v_ArrVal_133 (Array Int Int)) (v_ArrVal_132 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_132))) (< (select (select (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (+ c_~counter~0 (select (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 1))))) is different from false [2023-01-28 10:03:51,385 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:03:51,386 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 46 treesize of output 35 [2023-01-28 10:03:51,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 286 treesize of output 254 [2023-01-28 10:03:51,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2023-01-28 10:03:51,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-01-28 10:03:51,446 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:03:51,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-01-28 10:03:51,449 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:03:51,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 64 treesize of output 56 [2023-01-28 10:03:51,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-01-28 10:03:51,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605626545] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:03:51,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:03:51,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2023-01-28 10:03:51,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274400182] [2023-01-28 10:03:51,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:03:51,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 10:03:51,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:03:51,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 10:03:51,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=217, Unknown=4, NotChecked=132, Total=420 [2023-01-28 10:03:51,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 10:03:51,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 91 flow. Second operand has 21 states, 21 states have (on average 61.61904761904762) internal successors, (1294), 21 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:51,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:03:51,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 10:03:51,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:03:51,763 INFO L130 PetriNetUnfolder]: 110/198 cut-off events. [2023-01-28 10:03:51,766 INFO L131 PetriNetUnfolder]: For 98/98 co-relation queries the response was YES. [2023-01-28 10:03:51,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 198 events. 110/198 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 606 event pairs, 1 based on Foata normal form. 1/198 useless extension candidates. Maximal degree in co-relation 587. Up to 115 conditions per place. [2023-01-28 10:03:51,768 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 41 selfloop transitions, 13 changer transitions 1/55 dead transitions. [2023-01-28 10:03:51,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 55 transitions, 313 flow [2023-01-28 10:03:51,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 10:03:51,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 10:03:51,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 534 transitions. [2023-01-28 10:03:51,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32402912621359226 [2023-01-28 10:03:51,771 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 534 transitions. [2023-01-28 10:03:51,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 534 transitions. [2023-01-28 10:03:51,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:03:51,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 534 transitions. [2023-01-28 10:03:51,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 66.75) internal successors, (534), 8 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:51,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:51,775 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:51,775 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 91 flow. Second operand 8 states and 534 transitions. [2023-01-28 10:03:51,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 55 transitions, 313 flow [2023-01-28 10:03:51,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 55 transitions, 301 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-01-28 10:03:51,778 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 172 flow [2023-01-28 10:03:51,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=172, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-01-28 10:03:51,780 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-01-28 10:03:51,780 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 172 flow [2023-01-28 10:03:51,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 61.61904761904762) internal successors, (1294), 21 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:51,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:03:51,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:03:51,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-01-28 10:03:51,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:03:51,988 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:03:51,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:03:51,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1211991097, now seen corresponding path program 2 times [2023-01-28 10:03:51,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:03:51,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878899574] [2023-01-28 10:03:51,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:03:51,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:03:52,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:03:52,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:03:52,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:03:52,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878899574] [2023-01-28 10:03:52,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878899574] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:03:52,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882738926] [2023-01-28 10:03:52,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:03:52,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:03:52,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:03:52,337 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:03:52,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 10:03:52,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:03:52,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:03:52,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-28 10:03:52,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:03:52,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:03:52,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:03:52,576 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:03:52,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 15 [2023-01-28 10:03:52,588 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 10:03:52,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2023-01-28 10:03:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:03:52,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882738926] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:03:52,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:03:52,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-01-28 10:03:52,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006105693] [2023-01-28 10:03:52,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:03:52,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 10:03:52,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:03:52,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 10:03:52,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-01-28 10:03:52,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 206 [2023-01-28 10:03:52,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 172 flow. Second operand has 11 states, 11 states have (on average 74.81818181818181) internal successors, (823), 11 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:52,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:03:52,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 206 [2023-01-28 10:03:52,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:03:52,784 INFO L130 PetriNetUnfolder]: 137/246 cut-off events. [2023-01-28 10:03:52,784 INFO L131 PetriNetUnfolder]: For 273/273 co-relation queries the response was YES. [2023-01-28 10:03:52,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 892 conditions, 246 events. 137/246 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 779 event pairs, 25 based on Foata normal form. 1/246 useless extension candidates. Maximal degree in co-relation 868. Up to 190 conditions per place. [2023-01-28 10:03:52,787 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 41 selfloop transitions, 13 changer transitions 1/55 dead transitions. [2023-01-28 10:03:52,787 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 55 transitions, 387 flow [2023-01-28 10:03:52,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 10:03:52,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 10:03:52,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 549 transitions. [2023-01-28 10:03:52,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38072122052704577 [2023-01-28 10:03:52,789 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 549 transitions. [2023-01-28 10:03:52,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 549 transitions. [2023-01-28 10:03:52,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:03:52,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 549 transitions. [2023-01-28 10:03:52,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 78.42857142857143) internal successors, (549), 7 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:52,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:52,793 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:52,793 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 172 flow. Second operand 7 states and 549 transitions. [2023-01-28 10:03:52,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 55 transitions, 387 flow [2023-01-28 10:03:52,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 55 transitions, 362 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-01-28 10:03:52,798 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 266 flow [2023-01-28 10:03:52,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=266, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2023-01-28 10:03:52,798 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-01-28 10:03:52,798 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 266 flow [2023-01-28 10:03:52,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 74.81818181818181) internal successors, (823), 11 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:52,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:03:52,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:03:52,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 10:03:53,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:03:53,006 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:03:53,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:03:53,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1666552779, now seen corresponding path program 3 times [2023-01-28 10:03:53,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:03:53,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889588872] [2023-01-28 10:03:53,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:03:53,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:03:53,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:03:53,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:03:53,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:03:53,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889588872] [2023-01-28 10:03:53,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889588872] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:03:53,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629358919] [2023-01-28 10:03:53,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:03:53,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:03:53,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:03:53,279 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) [2023-01-28 10:03:53,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 10:03:53,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 10:03:53,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:03:53,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-28 10:03:53,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:03:53,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:03:53,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:03:53,477 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:03:53,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 15 [2023-01-28 10:03:53,487 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 10:03:53,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2023-01-28 10:03:53,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:03:53,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629358919] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:03:53,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:03:53,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-01-28 10:03:53,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993147765] [2023-01-28 10:03:53,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:03:53,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 10:03:53,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:03:53,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 10:03:53,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-01-28 10:03:53,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 206 [2023-01-28 10:03:53,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 266 flow. Second operand has 11 states, 11 states have (on average 74.63636363636364) internal successors, (821), 11 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:53,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:03:53,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 206 [2023-01-28 10:03:53,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:03:53,702 INFO L130 PetriNetUnfolder]: 159/285 cut-off events. [2023-01-28 10:03:53,702 INFO L131 PetriNetUnfolder]: For 481/481 co-relation queries the response was YES. [2023-01-28 10:03:53,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1115 conditions, 285 events. 159/285 cut-off events. For 481/481 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 962 event pairs, 33 based on Foata normal form. 1/285 useless extension candidates. Maximal degree in co-relation 1087. Up to 233 conditions per place. [2023-01-28 10:03:53,704 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 45 selfloop transitions, 14 changer transitions 1/60 dead transitions. [2023-01-28 10:03:53,704 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 60 transitions, 470 flow [2023-01-28 10:03:53,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 10:03:53,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 10:03:53,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 549 transitions. [2023-01-28 10:03:53,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38072122052704577 [2023-01-28 10:03:53,706 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 549 transitions. [2023-01-28 10:03:53,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 549 transitions. [2023-01-28 10:03:53,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:03:53,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 549 transitions. [2023-01-28 10:03:53,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 78.42857142857143) internal successors, (549), 7 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:53,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:53,710 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:53,710 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 266 flow. Second operand 7 states and 549 transitions. [2023-01-28 10:03:53,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 60 transitions, 470 flow [2023-01-28 10:03:53,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 60 transitions, 449 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-28 10:03:53,713 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 339 flow [2023-01-28 10:03:53,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=339, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2023-01-28 10:03:53,714 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 30 predicate places. [2023-01-28 10:03:53,714 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 339 flow [2023-01-28 10:03:53,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 74.63636363636364) internal successors, (821), 11 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:53,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:03:53,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:03:53,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 10:03:53,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:03:53,921 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:03:53,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:03:53,921 INFO L85 PathProgramCache]: Analyzing trace with hash -2131943909, now seen corresponding path program 4 times [2023-01-28 10:03:53,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:03:53,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078839024] [2023-01-28 10:03:53,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:03:53,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:03:53,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:03:54,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:03:54,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:03:54,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078839024] [2023-01-28 10:03:54,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078839024] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:03:54,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437784122] [2023-01-28 10:03:54,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:03:54,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:03:54,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:03:54,261 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) [2023-01-28 10:03:54,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 10:03:54,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:03:54,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:03:54,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-28 10:03:54,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:03:54,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:03:54,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:03:54,480 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:03:54,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 15 [2023-01-28 10:03:54,490 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 10:03:54,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2023-01-28 10:03:54,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:03:54,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437784122] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:03:54,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:03:54,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-01-28 10:03:54,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093179756] [2023-01-28 10:03:54,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:03:54,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 10:03:54,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:03:54,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 10:03:54,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-01-28 10:03:54,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 206 [2023-01-28 10:03:54,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 339 flow. Second operand has 11 states, 11 states have (on average 74.63636363636364) internal successors, (821), 11 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:54,537 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:03:54,537 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 206 [2023-01-28 10:03:54,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:03:54,686 INFO L130 PetriNetUnfolder]: 175/314 cut-off events. [2023-01-28 10:03:54,686 INFO L131 PetriNetUnfolder]: For 675/675 co-relation queries the response was YES. [2023-01-28 10:03:54,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1280 conditions, 314 events. 175/314 cut-off events. For 675/675 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1106 event pairs, 37 based on Foata normal form. 1/314 useless extension candidates. Maximal degree in co-relation 1248. Up to 258 conditions per place. [2023-01-28 10:03:54,689 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 50 selfloop transitions, 14 changer transitions 1/65 dead transitions. [2023-01-28 10:03:54,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 65 transitions, 547 flow [2023-01-28 10:03:54,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 10:03:54,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 10:03:54,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 551 transitions. [2023-01-28 10:03:54,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38210818307905686 [2023-01-28 10:03:54,691 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 551 transitions. [2023-01-28 10:03:54,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 551 transitions. [2023-01-28 10:03:54,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:03:54,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 551 transitions. [2023-01-28 10:03:54,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 78.71428571428571) internal successors, (551), 7 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:54,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:54,695 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:54,695 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 339 flow. Second operand 7 states and 551 transitions. [2023-01-28 10:03:54,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 65 transitions, 547 flow [2023-01-28 10:03:54,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 65 transitions, 516 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-01-28 10:03:54,698 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 383 flow [2023-01-28 10:03:54,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=383, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2023-01-28 10:03:54,699 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 36 predicate places. [2023-01-28 10:03:54,699 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 383 flow [2023-01-28 10:03:54,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 74.63636363636364) internal successors, (821), 11 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:54,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:03:54,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:03:54,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-28 10:03:54,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:03:54,905 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:03:54,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:03:54,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1053559879, now seen corresponding path program 5 times [2023-01-28 10:03:54,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:03:54,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223092646] [2023-01-28 10:03:54,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:03:54,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:03:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:03:55,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:03:55,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:03:55,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223092646] [2023-01-28 10:03:55,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223092646] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:03:55,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314617043] [2023-01-28 10:03:55,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:03:55,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:03:55,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:03:55,169 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) [2023-01-28 10:03:55,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-28 10:03:55,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:03:55,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:03:55,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-28 10:03:55,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:03:55,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:03:55,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:03:55,369 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:03:55,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 15 [2023-01-28 10:03:55,380 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 10:03:55,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2023-01-28 10:03:55,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:03:55,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314617043] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:03:55,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:03:55,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-01-28 10:03:55,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633575706] [2023-01-28 10:03:55,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:03:55,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 10:03:55,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:03:55,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 10:03:55,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-01-28 10:03:55,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 206 [2023-01-28 10:03:55,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 383 flow. Second operand has 11 states, 11 states have (on average 74.63636363636364) internal successors, (821), 11 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:55,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:03:55,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 206 [2023-01-28 10:03:55,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:03:55,595 INFO L130 PetriNetUnfolder]: 197/353 cut-off events. [2023-01-28 10:03:55,595 INFO L131 PetriNetUnfolder]: For 1017/1017 co-relation queries the response was YES. [2023-01-28 10:03:55,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1490 conditions, 353 events. 197/353 cut-off events. For 1017/1017 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1290 event pairs, 49 based on Foata normal form. 1/353 useless extension candidates. Maximal degree in co-relation 1455. Up to 301 conditions per place. [2023-01-28 10:03:55,598 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 50 selfloop transitions, 14 changer transitions 1/65 dead transitions. [2023-01-28 10:03:55,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 65 transitions, 596 flow [2023-01-28 10:03:55,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 10:03:55,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 10:03:55,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 547 transitions. [2023-01-28 10:03:55,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37933425797503467 [2023-01-28 10:03:55,600 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 547 transitions. [2023-01-28 10:03:55,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 547 transitions. [2023-01-28 10:03:55,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:03:55,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 547 transitions. [2023-01-28 10:03:55,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 78.14285714285714) internal successors, (547), 7 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:55,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:55,603 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:55,603 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 383 flow. Second operand 7 states and 547 transitions. [2023-01-28 10:03:55,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 65 transitions, 596 flow [2023-01-28 10:03:55,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 65 transitions, 554 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-01-28 10:03:55,607 INFO L231 Difference]: Finished difference. Result has 61 places, 52 transitions, 431 flow [2023-01-28 10:03:55,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=431, PETRI_PLACES=61, PETRI_TRANSITIONS=52} [2023-01-28 10:03:55,608 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 40 predicate places. [2023-01-28 10:03:55,608 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 52 transitions, 431 flow [2023-01-28 10:03:55,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 74.63636363636364) internal successors, (821), 11 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:55,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:03:55,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:03:55,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-28 10:03:55,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:03:55,814 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:03:55,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:03:55,814 INFO L85 PathProgramCache]: Analyzing trace with hash 448505845, now seen corresponding path program 6 times [2023-01-28 10:03:55,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:03:55,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650759477] [2023-01-28 10:03:55,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:03:55,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:03:55,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:03:56,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:03:56,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:03:56,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650759477] [2023-01-28 10:03:56,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650759477] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:03:56,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808457623] [2023-01-28 10:03:56,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:03:56,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:03:56,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:03:56,100 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) [2023-01-28 10:03:56,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-28 10:03:56,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 10:03:56,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:03:56,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-28 10:03:56,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:03:56,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:03:56,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:03:56,312 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:03:56,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2023-01-28 10:03:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:03:56,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808457623] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:03:56,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:03:56,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-01-28 10:03:56,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648395059] [2023-01-28 10:03:56,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:03:56,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 10:03:56,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:03:56,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 10:03:56,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-01-28 10:03:56,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 206 [2023-01-28 10:03:56,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 52 transitions, 431 flow. Second operand has 11 states, 11 states have (on average 74.63636363636364) internal successors, (821), 11 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:56,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:03:56,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 206 [2023-01-28 10:03:56,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:03:56,499 INFO L130 PetriNetUnfolder]: 225/402 cut-off events. [2023-01-28 10:03:56,499 INFO L131 PetriNetUnfolder]: For 1259/1259 co-relation queries the response was YES. [2023-01-28 10:03:56,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1719 conditions, 402 events. 225/402 cut-off events. For 1259/1259 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1530 event pairs, 43 based on Foata normal form. 1/402 useless extension candidates. Maximal degree in co-relation 1682. Up to 330 conditions per place. [2023-01-28 10:03:56,502 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 52 selfloop transitions, 19 changer transitions 1/72 dead transitions. [2023-01-28 10:03:56,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 72 transitions, 692 flow [2023-01-28 10:03:56,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 10:03:56,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 10:03:56,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 549 transitions. [2023-01-28 10:03:56,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38072122052704577 [2023-01-28 10:03:56,504 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 549 transitions. [2023-01-28 10:03:56,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 549 transitions. [2023-01-28 10:03:56,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:03:56,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 549 transitions. [2023-01-28 10:03:56,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 78.42857142857143) internal successors, (549), 7 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:56,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:56,509 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:56,509 INFO L175 Difference]: Start difference. First operand has 61 places, 52 transitions, 431 flow. Second operand 7 states and 549 transitions. [2023-01-28 10:03:56,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 72 transitions, 692 flow [2023-01-28 10:03:56,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 72 transitions, 645 flow, removed 17 selfloop flow, removed 3 redundant places. [2023-01-28 10:03:56,519 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 525 flow [2023-01-28 10:03:56,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=525, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2023-01-28 10:03:56,520 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 46 predicate places. [2023-01-28 10:03:56,520 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 525 flow [2023-01-28 10:03:56,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 74.63636363636364) internal successors, (821), 11 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:56,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:03:56,520 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:03:56,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-28 10:03:56,726 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,SelfDestructingSolverStorable10 [2023-01-28 10:03:56,726 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:03:56,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:03:56,727 INFO L85 PathProgramCache]: Analyzing trace with hash 2097028727, now seen corresponding path program 7 times [2023-01-28 10:03:56,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:03:56,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225143998] [2023-01-28 10:03:56,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:03:56,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:03:56,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:03:56,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:03:56,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:03:56,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225143998] [2023-01-28 10:03:56,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225143998] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:03:56,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465420148] [2023-01-28 10:03:56,814 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:03:56,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:03:56,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:03:56,815 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) [2023-01-28 10:03:56,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-28 10:03:56,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:03:56,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 10:03:56,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:03:56,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:03:56,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:03:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:03:57,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465420148] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:03:57,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:03:57,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-01-28 10:03:57,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975460250] [2023-01-28 10:03:57,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:03:57,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 10:03:57,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:03:57,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 10:03:57,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-01-28 10:03:57,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-28 10:03:57,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 525 flow. Second operand has 14 states, 14 states have (on average 77.42857142857143) internal successors, (1084), 14 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:57,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:03:57,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-28 10:03:57,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:03:57,252 INFO L130 PetriNetUnfolder]: 371/695 cut-off events. [2023-01-28 10:03:57,252 INFO L131 PetriNetUnfolder]: For 2683/2712 co-relation queries the response was YES. [2023-01-28 10:03:57,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2961 conditions, 695 events. 371/695 cut-off events. For 2683/2712 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3425 event pairs, 82 based on Foata normal form. 56/740 useless extension candidates. Maximal degree in co-relation 2560. Up to 275 conditions per place. [2023-01-28 10:03:57,256 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 103 selfloop transitions, 16 changer transitions 0/123 dead transitions. [2023-01-28 10:03:57,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 123 transitions, 1289 flow [2023-01-28 10:03:57,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 10:03:57,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 10:03:57,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 648 transitions. [2023-01-28 10:03:57,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932038834951456 [2023-01-28 10:03:57,259 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 648 transitions. [2023-01-28 10:03:57,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 648 transitions. [2023-01-28 10:03:57,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:03:57,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 648 transitions. [2023-01-28 10:03:57,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 81.0) internal successors, (648), 8 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:57,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:57,263 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:57,263 INFO L175 Difference]: Start difference. First operand has 67 places, 58 transitions, 525 flow. Second operand 8 states and 648 transitions. [2023-01-28 10:03:57,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 123 transitions, 1289 flow [2023-01-28 10:03:57,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 123 transitions, 1168 flow, removed 52 selfloop flow, removed 2 redundant places. [2023-01-28 10:03:57,271 INFO L231 Difference]: Finished difference. Result has 77 places, 72 transitions, 694 flow [2023-01-28 10:03:57,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=694, PETRI_PLACES=77, PETRI_TRANSITIONS=72} [2023-01-28 10:03:57,271 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 56 predicate places. [2023-01-28 10:03:57,271 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 72 transitions, 694 flow [2023-01-28 10:03:57,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 77.42857142857143) internal successors, (1084), 14 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:57,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:03:57,272 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:03:57,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-28 10:03:57,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:03:57,478 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:03:57,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:03:57,478 INFO L85 PathProgramCache]: Analyzing trace with hash 559731294, now seen corresponding path program 8 times [2023-01-28 10:03:57,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:03:57,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26835852] [2023-01-28 10:03:57,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:03:57,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:03:57,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:03:57,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:03:57,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:03:57,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26835852] [2023-01-28 10:03:57,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26835852] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:03:57,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231090542] [2023-01-28 10:03:57,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:03:57,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:03:57,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:03:57,559 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) [2023-01-28 10:03:57,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-28 10:03:57,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:03:57,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:03:57,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 10:03:57,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:03:57,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:03:57,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:03:57,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:03:57,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231090542] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:03:57,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:03:57,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-01-28 10:03:57,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162228962] [2023-01-28 10:03:57,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:03:57,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 10:03:57,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:03:57,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 10:03:57,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-01-28 10:03:57,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-28 10:03:57,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 72 transitions, 694 flow. Second operand has 14 states, 14 states have (on average 77.14285714285714) internal successors, (1080), 14 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:57,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:03:57,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-28 10:03:57,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:03:57,947 INFO L130 PetriNetUnfolder]: 305/609 cut-off events. [2023-01-28 10:03:57,947 INFO L131 PetriNetUnfolder]: For 1817/1840 co-relation queries the response was YES. [2023-01-28 10:03:57,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2620 conditions, 609 events. 305/609 cut-off events. For 1817/1840 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3096 event pairs, 89 based on Foata normal form. 53/656 useless extension candidates. Maximal degree in co-relation 2322. Up to 251 conditions per place. [2023-01-28 10:03:57,951 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 66 selfloop transitions, 4 changer transitions 36/110 dead transitions. [2023-01-28 10:03:57,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 110 transitions, 1137 flow [2023-01-28 10:03:57,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 10:03:57,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 10:03:57,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 647 transitions. [2023-01-28 10:03:57,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3925970873786408 [2023-01-28 10:03:57,954 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 647 transitions. [2023-01-28 10:03:57,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 647 transitions. [2023-01-28 10:03:57,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:03:57,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 647 transitions. [2023-01-28 10:03:57,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 80.875) internal successors, (647), 8 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:57,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:57,958 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:57,959 INFO L175 Difference]: Start difference. First operand has 77 places, 72 transitions, 694 flow. Second operand 8 states and 647 transitions. [2023-01-28 10:03:57,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 110 transitions, 1137 flow [2023-01-28 10:03:57,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 110 transitions, 1129 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-01-28 10:03:57,967 INFO L231 Difference]: Finished difference. Result has 86 places, 59 transitions, 567 flow [2023-01-28 10:03:57,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=567, PETRI_PLACES=86, PETRI_TRANSITIONS=59} [2023-01-28 10:03:57,968 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 65 predicate places. [2023-01-28 10:03:57,968 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 59 transitions, 567 flow [2023-01-28 10:03:57,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 77.14285714285714) internal successors, (1080), 14 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:57,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:03:57,969 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:03:57,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-28 10:03:58,174 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,SelfDestructingSolverStorable12 [2023-01-28 10:03:58,175 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:03:58,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:03:58,175 INFO L85 PathProgramCache]: Analyzing trace with hash 650633796, now seen corresponding path program 9 times [2023-01-28 10:03:58,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:03:58,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060888580] [2023-01-28 10:03:58,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:03:58,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:03:58,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:03:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:03:58,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:03:58,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060888580] [2023-01-28 10:03:58,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060888580] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:03:58,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002828437] [2023-01-28 10:03:58,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:03:58,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:03:58,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:03:58,259 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) [2023-01-28 10:03:58,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-28 10:03:58,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 10:03:58,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:03:58,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 10:03:58,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:03:58,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:03:58,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:03:58,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:03:58,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002828437] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:03:58,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:03:58,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-01-28 10:03:58,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521066112] [2023-01-28 10:03:58,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:03:58,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 10:03:58,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:03:58,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 10:03:58,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-01-28 10:03:58,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-28 10:03:58,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 59 transitions, 567 flow. Second operand has 14 states, 14 states have (on average 77.14285714285714) internal successors, (1080), 14 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:58,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:03:58,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-28 10:03:58,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:03:58,592 INFO L130 PetriNetUnfolder]: 165/296 cut-off events. [2023-01-28 10:03:58,593 INFO L131 PetriNetUnfolder]: For 1576/1583 co-relation queries the response was YES. [2023-01-28 10:03:58,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1606 conditions, 296 events. 165/296 cut-off events. For 1576/1583 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1036 event pairs, 28 based on Foata normal form. 51/346 useless extension candidates. Maximal degree in co-relation 1547. Up to 139 conditions per place. [2023-01-28 10:03:58,595 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 41 selfloop transitions, 25 changer transitions 0/70 dead transitions. [2023-01-28 10:03:58,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 70 transitions, 785 flow [2023-01-28 10:03:58,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 10:03:58,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 10:03:58,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 556 transitions. [2023-01-28 10:03:58,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3855755894590846 [2023-01-28 10:03:58,598 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 556 transitions. [2023-01-28 10:03:58,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 556 transitions. [2023-01-28 10:03:58,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:03:58,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 556 transitions. [2023-01-28 10:03:58,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.42857142857143) internal successors, (556), 7 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:58,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:58,602 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:58,602 INFO L175 Difference]: Start difference. First operand has 86 places, 59 transitions, 567 flow. Second operand 7 states and 556 transitions. [2023-01-28 10:03:58,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 70 transitions, 785 flow [2023-01-28 10:03:58,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 70 transitions, 630 flow, removed 69 selfloop flow, removed 11 redundant places. [2023-01-28 10:03:58,609 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 510 flow [2023-01-28 10:03:58,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=510, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-01-28 10:03:58,610 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 55 predicate places. [2023-01-28 10:03:58,610 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 510 flow [2023-01-28 10:03:58,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 77.14285714285714) internal successors, (1080), 14 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:58,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:03:58,611 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:03:58,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-28 10:03:58,816 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,SelfDestructingSolverStorable13 [2023-01-28 10:03:58,816 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:03:58,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:03:58,817 INFO L85 PathProgramCache]: Analyzing trace with hash -937838569, now seen corresponding path program 10 times [2023-01-28 10:03:58,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:03:58,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884138532] [2023-01-28 10:03:58,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:03:58,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:03:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:03:58,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:03:58,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:03:58,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884138532] [2023-01-28 10:03:58,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884138532] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:03:58,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314519674] [2023-01-28 10:03:58,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:03:58,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:03:58,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:03:58,900 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) [2023-01-28 10:03:58,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-28 10:03:58,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:03:58,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:03:58,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 10:03:58,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:03:59,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:03:59,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:03:59,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:03:59,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314519674] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:03:59,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:03:59,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-01-28 10:03:59,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992043609] [2023-01-28 10:03:59,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:03:59,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 10:03:59,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:03:59,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 10:03:59,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-01-28 10:03:59,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-28 10:03:59,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 60 transitions, 510 flow. Second operand has 14 states, 14 states have (on average 77.14285714285714) internal successors, (1080), 14 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:59,102 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:03:59,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-28 10:03:59,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:03:59,220 INFO L130 PetriNetUnfolder]: 120/214 cut-off events. [2023-01-28 10:03:59,221 INFO L131 PetriNetUnfolder]: For 1323/1332 co-relation queries the response was YES. [2023-01-28 10:03:59,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1218 conditions, 214 events. 120/214 cut-off events. For 1323/1332 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 650 event pairs, 27 based on Foata normal form. 31/242 useless extension candidates. Maximal degree in co-relation 1167. Up to 118 conditions per place. [2023-01-28 10:03:59,223 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 42 selfloop transitions, 25 changer transitions 0/71 dead transitions. [2023-01-28 10:03:59,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 71 transitions, 730 flow [2023-01-28 10:03:59,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 10:03:59,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 10:03:59,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 556 transitions. [2023-01-28 10:03:59,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3855755894590846 [2023-01-28 10:03:59,225 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 556 transitions. [2023-01-28 10:03:59,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 556 transitions. [2023-01-28 10:03:59,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:03:59,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 556 transitions. [2023-01-28 10:03:59,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.42857142857143) internal successors, (556), 7 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:59,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:59,228 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 206.0) internal successors, (1648), 8 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:59,228 INFO L175 Difference]: Start difference. First operand has 76 places, 60 transitions, 510 flow. Second operand 7 states and 556 transitions. [2023-01-28 10:03:59,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 71 transitions, 730 flow [2023-01-28 10:03:59,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 71 transitions, 648 flow, removed 25 selfloop flow, removed 5 redundant places. [2023-01-28 10:03:59,233 INFO L231 Difference]: Finished difference. Result has 78 places, 61 transitions, 522 flow [2023-01-28 10:03:59,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=522, PETRI_PLACES=78, PETRI_TRANSITIONS=61} [2023-01-28 10:03:59,234 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 57 predicate places. [2023-01-28 10:03:59,234 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 61 transitions, 522 flow [2023-01-28 10:03:59,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 77.14285714285714) internal successors, (1080), 14 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:03:59,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:03:59,234 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:03:59,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-28 10:03:59,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-28 10:03:59,440 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:03:59,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:03:59,441 INFO L85 PathProgramCache]: Analyzing trace with hash -603236243, now seen corresponding path program 11 times [2023-01-28 10:03:59,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:03:59,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698173439] [2023-01-28 10:03:59,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:03:59,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:03:59,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:04:00,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:04:00,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:04:00,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698173439] [2023-01-28 10:04:00,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698173439] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:04:00,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488006779] [2023-01-28 10:04:00,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:04:00,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:00,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:04:00,265 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) [2023-01-28 10:04:00,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-28 10:04:00,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:04:00,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:04:00,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 78 conjunts are in the unsatisfiable core [2023-01-28 10:04:00,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:04:00,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:04:00,536 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 [2023-01-28 10:04:00,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:04:00,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:04:00,754 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_446 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_446) c_~A~0.base))) (+ (select .cse0 .cse1) (select .cse0 c_~A~0.offset))) (+ c_~counter~0 1))) (forall ((v_ArrVal_446 (Array Int Int))) (<= c_~counter~0 (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_446) c_~A~0.base))) (+ (select .cse2 .cse1) (select .cse2 c_~A~0.offset))))))) is different from false [2023-01-28 10:04:00,849 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:00,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 68 [2023-01-28 10:04:00,856 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:00,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 13 [2023-01-28 10:04:00,911 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:04:01,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:04:01,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488006779] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:04:01,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:04:01,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 29 [2023-01-28 10:04:01,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634085915] [2023-01-28 10:04:01,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:04:01,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 10:04:01,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:04:01,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 10:04:01,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=761, Unknown=7, NotChecked=56, Total=930 [2023-01-28 10:04:01,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 10:04:01,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 61 transitions, 522 flow. Second operand has 31 states, 31 states have (on average 54.645161290322584) internal successors, (1694), 31 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:01,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:04:01,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 10:04:01,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:04:01,870 INFO L130 PetriNetUnfolder]: 182/321 cut-off events. [2023-01-28 10:04:01,870 INFO L131 PetriNetUnfolder]: For 1842/1842 co-relation queries the response was YES. [2023-01-28 10:04:01,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1810 conditions, 321 events. 182/321 cut-off events. For 1842/1842 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1065 event pairs, 11 based on Foata normal form. 1/321 useless extension candidates. Maximal degree in co-relation 1758. Up to 187 conditions per place. [2023-01-28 10:04:01,873 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 65 selfloop transitions, 40 changer transitions 1/106 dead transitions. [2023-01-28 10:04:01,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 106 transitions, 991 flow [2023-01-28 10:04:01,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 10:04:01,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 10:04:01,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 930 transitions. [2023-01-28 10:04:01,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2821601941747573 [2023-01-28 10:04:01,878 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 930 transitions. [2023-01-28 10:04:01,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 930 transitions. [2023-01-28 10:04:01,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:04:01,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 930 transitions. [2023-01-28 10:04:01,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 58.125) internal successors, (930), 16 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:01,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:01,886 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:01,887 INFO L175 Difference]: Start difference. First operand has 78 places, 61 transitions, 522 flow. Second operand 16 states and 930 transitions. [2023-01-28 10:04:01,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 106 transitions, 991 flow [2023-01-28 10:04:01,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 106 transitions, 924 flow, removed 17 selfloop flow, removed 5 redundant places. [2023-01-28 10:04:01,895 INFO L231 Difference]: Finished difference. Result has 92 places, 73 transitions, 726 flow [2023-01-28 10:04:01,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=726, PETRI_PLACES=92, PETRI_TRANSITIONS=73} [2023-01-28 10:04:01,895 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 71 predicate places. [2023-01-28 10:04:01,895 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 73 transitions, 726 flow [2023-01-28 10:04:01,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 54.645161290322584) internal successors, (1694), 31 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:01,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:04:01,896 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:04:01,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-28 10:04:02,102 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,SelfDestructingSolverStorable15 [2023-01-28 10:04:02,103 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:04:02,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:04:02,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1564132795, now seen corresponding path program 12 times [2023-01-28 10:04:02,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:04:02,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144759543] [2023-01-28 10:04:02,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:04:02,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:04:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:04:02,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:04:02,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:04:02,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144759543] [2023-01-28 10:04:02,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144759543] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:04:02,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100591612] [2023-01-28 10:04:02,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:04:02,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:02,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:04:02,601 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) [2023-01-28 10:04:02,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-28 10:04:02,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 10:04:02,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:04:02,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-01-28 10:04:02,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:04:02,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:04:02,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:04:02,977 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:02,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 44 [2023-01-28 10:04:03,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:04:03,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100591612] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:04:03,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:04:03,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 13 [2023-01-28 10:04:03,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909015379] [2023-01-28 10:04:03,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:04:03,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 10:04:03,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:04:03,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 10:04:03,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-01-28 10:04:03,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 206 [2023-01-28 10:04:03,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 73 transitions, 726 flow. Second operand has 15 states, 15 states have (on average 74.2) internal successors, (1113), 15 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:03,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:04:03,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 206 [2023-01-28 10:04:03,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:04:03,408 INFO L130 PetriNetUnfolder]: 270/480 cut-off events. [2023-01-28 10:04:03,408 INFO L131 PetriNetUnfolder]: For 2965/2965 co-relation queries the response was YES. [2023-01-28 10:04:03,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2826 conditions, 480 events. 270/480 cut-off events. For 2965/2965 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1789 event pairs, 29 based on Foata normal form. 2/481 useless extension candidates. Maximal degree in co-relation 2770. Up to 317 conditions per place. [2023-01-28 10:04:03,413 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 95 selfloop transitions, 39 changer transitions 2/136 dead transitions. [2023-01-28 10:04:03,413 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 136 transitions, 1436 flow [2023-01-28 10:04:03,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 10:04:03,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 10:04:03,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1098 transitions. [2023-01-28 10:04:03,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38072122052704577 [2023-01-28 10:04:03,438 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1098 transitions. [2023-01-28 10:04:03,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1098 transitions. [2023-01-28 10:04:03,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:04:03,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1098 transitions. [2023-01-28 10:04:03,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 78.42857142857143) internal successors, (1098), 14 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:03,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 206.0) internal successors, (3090), 15 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:03,452 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 206.0) internal successors, (3090), 15 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:03,452 INFO L175 Difference]: Start difference. First operand has 92 places, 73 transitions, 726 flow. Second operand 14 states and 1098 transitions. [2023-01-28 10:04:03,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 136 transitions, 1436 flow [2023-01-28 10:04:03,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 136 transitions, 1295 flow, removed 41 selfloop flow, removed 10 redundant places. [2023-01-28 10:04:03,462 INFO L231 Difference]: Finished difference. Result has 102 places, 93 transitions, 1004 flow [2023-01-28 10:04:03,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1004, PETRI_PLACES=102, PETRI_TRANSITIONS=93} [2023-01-28 10:04:03,463 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 81 predicate places. [2023-01-28 10:04:03,463 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 93 transitions, 1004 flow [2023-01-28 10:04:03,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 74.2) internal successors, (1113), 15 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:03,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:04:03,464 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:04:03,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-28 10:04:03,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:03,670 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:04:03,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:04:03,671 INFO L85 PathProgramCache]: Analyzing trace with hash -701418181, now seen corresponding path program 13 times [2023-01-28 10:04:03,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:04:03,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458935187] [2023-01-28 10:04:03,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:04:03,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:04:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:04:04,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:04:04,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:04:04,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458935187] [2023-01-28 10:04:04,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458935187] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:04:04,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071269399] [2023-01-28 10:04:04,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:04:04,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:04,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:04:04,439 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) [2023-01-28 10:04:04,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-28 10:04:04,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:04:04,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-28 10:04:04,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:04:04,680 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:04:04,682 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:04,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2023-01-28 10:04:04,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:04:04,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:04:04,826 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:04,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 44 [2023-01-28 10:04:04,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:04:04,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071269399] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:04:04,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:04:04,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 18 [2023-01-28 10:04:04,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305028562] [2023-01-28 10:04:04,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:04:04,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 10:04:04,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:04:04,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 10:04:04,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-01-28 10:04:04,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 10:04:04,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 93 transitions, 1004 flow. Second operand has 20 states, 20 states have (on average 62.1) internal successors, (1242), 20 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:04,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:04:04,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 10:04:04,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:04:05,436 INFO L130 PetriNetUnfolder]: 302/538 cut-off events. [2023-01-28 10:04:05,437 INFO L131 PetriNetUnfolder]: For 3587/3587 co-relation queries the response was YES. [2023-01-28 10:04:05,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3205 conditions, 538 events. 302/538 cut-off events. For 3587/3587 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2088 event pairs, 47 based on Foata normal form. 2/539 useless extension candidates. Maximal degree in co-relation 3144. Up to 408 conditions per place. [2023-01-28 10:04:05,442 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 96 selfloop transitions, 35 changer transitions 2/133 dead transitions. [2023-01-28 10:04:05,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 133 transitions, 1484 flow [2023-01-28 10:04:05,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 10:04:05,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 10:04:05,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1045 transitions. [2023-01-28 10:04:05,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3170509708737864 [2023-01-28 10:04:05,445 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1045 transitions. [2023-01-28 10:04:05,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1045 transitions. [2023-01-28 10:04:05,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:04:05,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1045 transitions. [2023-01-28 10:04:05,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 65.3125) internal successors, (1045), 16 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:05,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:05,454 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:05,454 INFO L175 Difference]: Start difference. First operand has 102 places, 93 transitions, 1004 flow. Second operand 16 states and 1045 transitions. [2023-01-28 10:04:05,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 133 transitions, 1484 flow [2023-01-28 10:04:05,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 133 transitions, 1329 flow, removed 71 selfloop flow, removed 3 redundant places. [2023-01-28 10:04:05,469 INFO L231 Difference]: Finished difference. Result has 116 places, 97 transitions, 1013 flow [2023-01-28 10:04:05,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1013, PETRI_PLACES=116, PETRI_TRANSITIONS=97} [2023-01-28 10:04:05,470 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 95 predicate places. [2023-01-28 10:04:05,470 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 97 transitions, 1013 flow [2023-01-28 10:04:05,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 62.1) internal successors, (1242), 20 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:05,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:04:05,470 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:04:05,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-28 10:04:05,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-28 10:04:05,677 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:04:05,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:04:05,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1056177927, now seen corresponding path program 14 times [2023-01-28 10:04:05,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:04:05,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763488938] [2023-01-28 10:04:05,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:04:05,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:04:05,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:04:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:04:06,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:04:06,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763488938] [2023-01-28 10:04:06,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763488938] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:04:06,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885120686] [2023-01-28 10:04:06,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:04:06,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:06,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:04:06,249 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) [2023-01-28 10:04:06,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-28 10:04:06,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:04:06,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:04:06,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-01-28 10:04:06,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:04:06,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:04:06,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:04:06,597 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:06,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-01-28 10:04:06,644 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-28 10:04:06,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-01-28 10:04:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:04:06,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885120686] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:04:06,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:04:06,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 17 [2023-01-28 10:04:06,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844669467] [2023-01-28 10:04:06,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:04:06,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 10:04:06,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:04:06,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 10:04:06,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-01-28 10:04:06,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 10:04:06,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 97 transitions, 1013 flow. Second operand has 19 states, 19 states have (on average 62.05263157894737) internal successors, (1179), 19 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:06,698 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:04:06,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 10:04:06,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:04:07,114 INFO L130 PetriNetUnfolder]: 374/666 cut-off events. [2023-01-28 10:04:07,115 INFO L131 PetriNetUnfolder]: For 4600/4600 co-relation queries the response was YES. [2023-01-28 10:04:07,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3907 conditions, 666 events. 374/666 cut-off events. For 4600/4600 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2769 event pairs, 71 based on Foata normal form. 2/667 useless extension candidates. Maximal degree in co-relation 3841. Up to 536 conditions per place. [2023-01-28 10:04:07,121 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 115 selfloop transitions, 30 changer transitions 2/147 dead transitions. [2023-01-28 10:04:07,121 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 147 transitions, 1749 flow [2023-01-28 10:04:07,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 10:04:07,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 10:04:07,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1043 transitions. [2023-01-28 10:04:07,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31644417475728154 [2023-01-28 10:04:07,124 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1043 transitions. [2023-01-28 10:04:07,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1043 transitions. [2023-01-28 10:04:07,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:04:07,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1043 transitions. [2023-01-28 10:04:07,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 65.1875) internal successors, (1043), 16 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:07,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:07,129 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:07,129 INFO L175 Difference]: Start difference. First operand has 116 places, 97 transitions, 1013 flow. Second operand 16 states and 1043 transitions. [2023-01-28 10:04:07,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 147 transitions, 1749 flow [2023-01-28 10:04:07,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 147 transitions, 1647 flow, removed 27 selfloop flow, removed 12 redundant places. [2023-01-28 10:04:07,144 INFO L231 Difference]: Finished difference. Result has 122 places, 111 transitions, 1287 flow [2023-01-28 10:04:07,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1287, PETRI_PLACES=122, PETRI_TRANSITIONS=111} [2023-01-28 10:04:07,144 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 101 predicate places. [2023-01-28 10:04:07,144 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 111 transitions, 1287 flow [2023-01-28 10:04:07,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.05263157894737) internal successors, (1179), 19 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:07,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:04:07,145 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:04:07,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-28 10:04:07,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:07,351 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:04:07,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:04:07,351 INFO L85 PathProgramCache]: Analyzing trace with hash -425348409, now seen corresponding path program 15 times [2023-01-28 10:04:07,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:04:07,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221357530] [2023-01-28 10:04:07,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:04:07,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:04:07,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:04:07,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:04:07,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:04:07,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221357530] [2023-01-28 10:04:07,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221357530] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:04:07,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781571919] [2023-01-28 10:04:07,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:04:07,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:07,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:04:07,937 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) [2023-01-28 10:04:07,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-28 10:04:08,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 10:04:08,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:04:08,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-28 10:04:08,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:04:08,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:04:08,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:04:08,443 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:08,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-01-28 10:04:08,497 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-28 10:04:08,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-01-28 10:04:08,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:04:08,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781571919] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:04:08,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:04:08,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2023-01-28 10:04:08,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567224022] [2023-01-28 10:04:08,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:04:08,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-28 10:04:08,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:04:08,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-28 10:04:08,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2023-01-28 10:04:08,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 10:04:08,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 111 transitions, 1287 flow. Second operand has 26 states, 26 states have (on average 61.88461538461539) internal successors, (1609), 26 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:08,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:04:08,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 10:04:08,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:04:09,233 INFO L130 PetriNetUnfolder]: 460/822 cut-off events. [2023-01-28 10:04:09,233 INFO L131 PetriNetUnfolder]: For 6438/6438 co-relation queries the response was YES. [2023-01-28 10:04:09,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4953 conditions, 822 events. 460/822 cut-off events. For 6438/6438 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3679 event pairs, 94 based on Foata normal form. 2/823 useless extension candidates. Maximal degree in co-relation 4883. Up to 663 conditions per place. [2023-01-28 10:04:09,240 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 134 selfloop transitions, 37 changer transitions 2/173 dead transitions. [2023-01-28 10:04:09,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 173 transitions, 2127 flow [2023-01-28 10:04:09,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 10:04:09,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 10:04:09,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1241 transitions. [2023-01-28 10:04:09,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3170669391926418 [2023-01-28 10:04:09,243 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1241 transitions. [2023-01-28 10:04:09,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1241 transitions. [2023-01-28 10:04:09,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:04:09,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1241 transitions. [2023-01-28 10:04:09,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 65.3157894736842) internal successors, (1241), 19 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:09,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 206.0) internal successors, (4120), 20 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:09,249 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 206.0) internal successors, (4120), 20 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:09,249 INFO L175 Difference]: Start difference. First operand has 122 places, 111 transitions, 1287 flow. Second operand 19 states and 1241 transitions. [2023-01-28 10:04:09,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 173 transitions, 2127 flow [2023-01-28 10:04:09,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 173 transitions, 1875 flow, removed 113 selfloop flow, removed 8 redundant places. [2023-01-28 10:04:09,270 INFO L231 Difference]: Finished difference. Result has 137 places, 125 transitions, 1438 flow [2023-01-28 10:04:09,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1438, PETRI_PLACES=137, PETRI_TRANSITIONS=125} [2023-01-28 10:04:09,270 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 116 predicate places. [2023-01-28 10:04:09,270 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 125 transitions, 1438 flow [2023-01-28 10:04:09,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 61.88461538461539) internal successors, (1609), 26 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:09,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:04:09,271 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:04:09,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-28 10:04:09,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:09,477 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:04:09,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:04:09,477 INFO L85 PathProgramCache]: Analyzing trace with hash -2097113607, now seen corresponding path program 16 times [2023-01-28 10:04:09,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:04:09,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179274404] [2023-01-28 10:04:09,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:04:09,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:04:09,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:04:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:04:10,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:04:10,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179274404] [2023-01-28 10:04:10,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179274404] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:04:10,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884971489] [2023-01-28 10:04:10,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:04:10,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:10,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:04:10,028 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) [2023-01-28 10:04:10,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-28 10:04:10,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:04:10,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:04:10,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-28 10:04:10,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:04:10,409 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:04:10,413 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:10,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2023-01-28 10:04:10,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:04:10,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:04:10,542 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:10,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-01-28 10:04:10,601 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-28 10:04:10,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-01-28 10:04:10,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:04:10,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884971489] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:04:10,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:04:10,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 23 [2023-01-28 10:04:10,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468783489] [2023-01-28 10:04:10,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:04:10,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 10:04:10,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:04:10,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 10:04:10,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2023-01-28 10:04:10,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 10:04:10,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 125 transitions, 1438 flow. Second operand has 25 states, 25 states have (on average 61.96) internal successors, (1549), 25 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:10,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:04:10,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 10:04:10,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:04:11,201 INFO L130 PetriNetUnfolder]: 532/953 cut-off events. [2023-01-28 10:04:11,202 INFO L131 PetriNetUnfolder]: For 7050/7050 co-relation queries the response was YES. [2023-01-28 10:04:11,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5601 conditions, 953 events. 532/953 cut-off events. For 7050/7050 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4488 event pairs, 127 based on Foata normal form. 2/954 useless extension candidates. Maximal degree in co-relation 5526. Up to 806 conditions per place. [2023-01-28 10:04:11,211 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 140 selfloop transitions, 32 changer transitions 3/175 dead transitions. [2023-01-28 10:04:11,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 175 transitions, 2175 flow [2023-01-28 10:04:11,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 10:04:11,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 10:04:11,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 985 transitions. [2023-01-28 10:04:11,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3187702265372168 [2023-01-28 10:04:11,214 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 985 transitions. [2023-01-28 10:04:11,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 985 transitions. [2023-01-28 10:04:11,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:04:11,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 985 transitions. [2023-01-28 10:04:11,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 65.66666666666667) internal successors, (985), 15 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:11,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:11,220 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:11,220 INFO L175 Difference]: Start difference. First operand has 137 places, 125 transitions, 1438 flow. Second operand 15 states and 985 transitions. [2023-01-28 10:04:11,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 175 transitions, 2175 flow [2023-01-28 10:04:11,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 175 transitions, 1910 flow, removed 109 selfloop flow, removed 12 redundant places. [2023-01-28 10:04:11,243 INFO L231 Difference]: Finished difference. Result has 143 places, 135 transitions, 1486 flow [2023-01-28 10:04:11,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1486, PETRI_PLACES=143, PETRI_TRANSITIONS=135} [2023-01-28 10:04:11,244 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 122 predicate places. [2023-01-28 10:04:11,244 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 135 transitions, 1486 flow [2023-01-28 10:04:11,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 61.96) internal successors, (1549), 25 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:11,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:04:11,244 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:04:11,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-28 10:04:11,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:11,450 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:04:11,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:04:11,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1659998111, now seen corresponding path program 17 times [2023-01-28 10:04:11,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:04:11,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145728900] [2023-01-28 10:04:11,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:04:11,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:04:11,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:04:11,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:04:11,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:04:11,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145728900] [2023-01-28 10:04:11,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145728900] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:04:11,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211934929] [2023-01-28 10:04:11,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:04:11,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:11,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:04:11,991 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) [2023-01-28 10:04:11,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-28 10:04:12,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:04:12,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:04:12,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-28 10:04:12,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:04:12,268 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:04:12,270 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:12,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2023-01-28 10:04:12,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:04:12,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:04:12,411 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:12,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-01-28 10:04:12,465 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-28 10:04:12,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-01-28 10:04:12,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:04:12,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211934929] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:04:12,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:04:12,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 23 [2023-01-28 10:04:12,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893849798] [2023-01-28 10:04:12,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:04:12,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 10:04:12,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:04:12,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 10:04:12,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2023-01-28 10:04:12,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 10:04:12,534 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 135 transitions, 1486 flow. Second operand has 25 states, 25 states have (on average 61.96) internal successors, (1549), 25 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:12,534 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:04:12,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 10:04:12,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:04:13,068 INFO L130 PetriNetUnfolder]: 564/1011 cut-off events. [2023-01-28 10:04:13,068 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-01-28 10:04:13,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5706 conditions, 1011 events. 564/1011 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4841 event pairs, 135 based on Foata normal form. 2/1012 useless extension candidates. Maximal degree in co-relation 5628. Up to 896 conditions per place. [2023-01-28 10:04:13,079 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 144 selfloop transitions, 26 changer transitions 2/172 dead transitions. [2023-01-28 10:04:13,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 172 transitions, 2082 flow [2023-01-28 10:04:13,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 10:04:13,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 10:04:13,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 916 transitions. [2023-01-28 10:04:13,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31761442441054094 [2023-01-28 10:04:13,081 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 916 transitions. [2023-01-28 10:04:13,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 916 transitions. [2023-01-28 10:04:13,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:04:13,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 916 transitions. [2023-01-28 10:04:13,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 65.42857142857143) internal successors, (916), 14 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:13,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 206.0) internal successors, (3090), 15 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:13,086 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 206.0) internal successors, (3090), 15 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:13,086 INFO L175 Difference]: Start difference. First operand has 143 places, 135 transitions, 1486 flow. Second operand 14 states and 916 transitions. [2023-01-28 10:04:13,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 172 transitions, 2082 flow [2023-01-28 10:04:13,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 172 transitions, 1928 flow, removed 64 selfloop flow, removed 8 redundant places. [2023-01-28 10:04:13,111 INFO L231 Difference]: Finished difference. Result has 150 places, 139 transitions, 1510 flow [2023-01-28 10:04:13,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1332, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1510, PETRI_PLACES=150, PETRI_TRANSITIONS=139} [2023-01-28 10:04:13,111 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 129 predicate places. [2023-01-28 10:04:13,111 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 139 transitions, 1510 flow [2023-01-28 10:04:13,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 61.96) internal successors, (1549), 25 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:13,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:04:13,112 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:04:13,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-28 10:04:13,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:13,318 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:04:13,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:04:13,318 INFO L85 PathProgramCache]: Analyzing trace with hash -2101988531, now seen corresponding path program 18 times [2023-01-28 10:04:13,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:04:13,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741582641] [2023-01-28 10:04:13,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:04:13,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:04:13,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:04:13,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:04:13,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:04:13,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741582641] [2023-01-28 10:04:13,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741582641] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:04:13,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614904701] [2023-01-28 10:04:13,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:04:13,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:13,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:04:13,860 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:04:13,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-28 10:04:13,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 10:04:13,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:04:13,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-01-28 10:04:13,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:04:14,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:04:14,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:04:14,175 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:14,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-01-28 10:04:14,225 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-28 10:04:14,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-01-28 10:04:14,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:04:14,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614904701] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:04:14,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:04:14,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 23 [2023-01-28 10:04:14,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560372024] [2023-01-28 10:04:14,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:04:14,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 10:04:14,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:04:14,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 10:04:14,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2023-01-28 10:04:14,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 10:04:14,276 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 139 transitions, 1510 flow. Second operand has 25 states, 25 states have (on average 61.92) internal successors, (1548), 25 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:14,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:04:14,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 10:04:14,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:04:14,800 INFO L130 PetriNetUnfolder]: 626/1123 cut-off events. [2023-01-28 10:04:14,800 INFO L131 PetriNetUnfolder]: For 8749/8749 co-relation queries the response was YES. [2023-01-28 10:04:14,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6436 conditions, 1123 events. 626/1123 cut-off events. For 8749/8749 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5529 event pairs, 163 based on Foata normal form. 2/1124 useless extension candidates. Maximal degree in co-relation 6355. Up to 995 conditions per place. [2023-01-28 10:04:14,811 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 145 selfloop transitions, 34 changer transitions 2/181 dead transitions. [2023-01-28 10:04:14,811 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 181 transitions, 2298 flow [2023-01-28 10:04:14,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 10:04:14,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 10:04:14,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 916 transitions. [2023-01-28 10:04:14,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31761442441054094 [2023-01-28 10:04:14,813 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 916 transitions. [2023-01-28 10:04:14,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 916 transitions. [2023-01-28 10:04:14,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:04:14,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 916 transitions. [2023-01-28 10:04:14,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 65.42857142857143) internal successors, (916), 14 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:14,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 206.0) internal successors, (3090), 15 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:14,818 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 206.0) internal successors, (3090), 15 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:14,818 INFO L175 Difference]: Start difference. First operand has 150 places, 139 transitions, 1510 flow. Second operand 14 states and 916 transitions. [2023-01-28 10:04:14,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 181 transitions, 2298 flow [2023-01-28 10:04:14,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 181 transitions, 2180 flow, removed 43 selfloop flow, removed 10 redundant places. [2023-01-28 10:04:14,848 INFO L231 Difference]: Finished difference. Result has 157 places, 149 transitions, 1780 flow [2023-01-28 10:04:14,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1392, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1780, PETRI_PLACES=157, PETRI_TRANSITIONS=149} [2023-01-28 10:04:14,849 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 136 predicate places. [2023-01-28 10:04:14,849 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 149 transitions, 1780 flow [2023-01-28 10:04:14,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 61.92) internal successors, (1548), 25 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:14,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:04:14,850 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:04:14,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-28 10:04:15,055 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,SelfDestructingSolverStorable22 [2023-01-28 10:04:15,056 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:04:15,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:04:15,056 INFO L85 PathProgramCache]: Analyzing trace with hash 556637051, now seen corresponding path program 19 times [2023-01-28 10:04:15,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:04:15,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045789985] [2023-01-28 10:04:15,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:04:15,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:04:15,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:04:15,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:04:15,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:04:15,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045789985] [2023-01-28 10:04:15,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045789985] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:04:15,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520582735] [2023-01-28 10:04:15,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:04:15,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:15,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:04:15,749 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) [2023-01-28 10:04:15,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-28 10:04:15,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:04:15,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-28 10:04:15,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:04:16,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:04:16,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:04:16,159 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:16,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-01-28 10:04:16,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:04:16,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520582735] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:04:16,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:04:16,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 6] total 25 [2023-01-28 10:04:16,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463609919] [2023-01-28 10:04:16,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:04:16,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 10:04:16,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:04:16,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 10:04:16,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2023-01-28 10:04:16,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 10:04:16,230 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 149 transitions, 1780 flow. Second operand has 27 states, 27 states have (on average 54.81481481481482) internal successors, (1480), 27 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:16,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:04:16,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 10:04:16,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:04:16,909 INFO L130 PetriNetUnfolder]: 688/1235 cut-off events. [2023-01-28 10:04:16,910 INFO L131 PetriNetUnfolder]: For 11490/11490 co-relation queries the response was YES. [2023-01-28 10:04:16,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7358 conditions, 1235 events. 688/1235 cut-off events. For 11490/11490 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6265 event pairs, 165 based on Foata normal form. 2/1236 useless extension candidates. Maximal degree in co-relation 7272. Up to 993 conditions per place. [2023-01-28 10:04:16,928 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 135 selfloop transitions, 57 changer transitions 2/194 dead transitions. [2023-01-28 10:04:16,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 194 transitions, 2631 flow [2023-01-28 10:04:16,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 10:04:16,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 10:04:16,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 983 transitions. [2023-01-28 10:04:16,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2806967447173044 [2023-01-28 10:04:16,933 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 983 transitions. [2023-01-28 10:04:16,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 983 transitions. [2023-01-28 10:04:16,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:04:16,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 983 transitions. [2023-01-28 10:04:16,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 57.8235294117647) internal successors, (983), 17 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:16,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 206.0) internal successors, (3708), 18 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:16,942 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 206.0) internal successors, (3708), 18 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:16,942 INFO L175 Difference]: Start difference. First operand has 157 places, 149 transitions, 1780 flow. Second operand 17 states and 983 transitions. [2023-01-28 10:04:16,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 194 transitions, 2631 flow [2023-01-28 10:04:16,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 194 transitions, 2398 flow, removed 105 selfloop flow, removed 7 redundant places. [2023-01-28 10:04:16,984 INFO L231 Difference]: Finished difference. Result has 170 places, 160 transitions, 2024 flow [2023-01-28 10:04:16,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1547, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2024, PETRI_PLACES=170, PETRI_TRANSITIONS=160} [2023-01-28 10:04:16,984 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 149 predicate places. [2023-01-28 10:04:16,985 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 160 transitions, 2024 flow [2023-01-28 10:04:16,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 54.81481481481482) internal successors, (1480), 27 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:16,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:04:16,985 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:04:16,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-01-28 10:04:17,190 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,SelfDestructingSolverStorable23 [2023-01-28 10:04:17,190 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:04:17,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:04:17,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1024293669, now seen corresponding path program 20 times [2023-01-28 10:04:17,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:04:17,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397158461] [2023-01-28 10:04:17,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:04:17,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:04:17,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:04:17,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:04:17,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:04:17,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397158461] [2023-01-28 10:04:17,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397158461] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:04:17,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474473778] [2023-01-28 10:04:17,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:04:17,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:17,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:04:17,622 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) [2023-01-28 10:04:17,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-28 10:04:17,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:04:17,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:04:17,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-01-28 10:04:17,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:04:17,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:04:17,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:04:17,935 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:17,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-01-28 10:04:17,980 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-28 10:04:17,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-01-28 10:04:18,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:04:18,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474473778] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:04:18,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:04:18,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 21 [2023-01-28 10:04:18,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702154606] [2023-01-28 10:04:18,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:04:18,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 10:04:18,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:04:18,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 10:04:18,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2023-01-28 10:04:18,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 10:04:18,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 160 transitions, 2024 flow. Second operand has 23 states, 23 states have (on average 62.0) internal successors, (1426), 23 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:18,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:04:18,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 10:04:18,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:04:18,585 INFO L130 PetriNetUnfolder]: 754/1353 cut-off events. [2023-01-28 10:04:18,585 INFO L131 PetriNetUnfolder]: For 14228/14228 co-relation queries the response was YES. [2023-01-28 10:04:18,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8245 conditions, 1353 events. 754/1353 cut-off events. For 14228/14228 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7022 event pairs, 201 based on Foata normal form. 2/1355 useless extension candidates. Maximal degree in co-relation 8153. Up to 1204 conditions per place. [2023-01-28 10:04:18,596 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 172 selfloop transitions, 32 changer transitions 2/206 dead transitions. [2023-01-28 10:04:18,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 206 transitions, 2973 flow [2023-01-28 10:04:18,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 10:04:18,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 10:04:18,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1041 transitions. [2023-01-28 10:04:18,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3158373786407767 [2023-01-28 10:04:18,599 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1041 transitions. [2023-01-28 10:04:18,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1041 transitions. [2023-01-28 10:04:18,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:04:18,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1041 transitions. [2023-01-28 10:04:18,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 65.0625) internal successors, (1041), 16 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:18,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:18,604 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:18,604 INFO L175 Difference]: Start difference. First operand has 170 places, 160 transitions, 2024 flow. Second operand 16 states and 1041 transitions. [2023-01-28 10:04:18,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 206 transitions, 2973 flow [2023-01-28 10:04:18,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 206 transitions, 2665 flow, removed 129 selfloop flow, removed 11 redundant places. [2023-01-28 10:04:18,652 INFO L231 Difference]: Finished difference. Result has 177 places, 172 transitions, 2182 flow [2023-01-28 10:04:18,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1742, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2182, PETRI_PLACES=177, PETRI_TRANSITIONS=172} [2023-01-28 10:04:18,652 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 156 predicate places. [2023-01-28 10:04:18,652 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 172 transitions, 2182 flow [2023-01-28 10:04:18,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 62.0) internal successors, (1426), 23 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:18,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:04:18,653 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:04:18,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-28 10:04:18,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:18,858 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:04:18,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:04:18,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1652983725, now seen corresponding path program 21 times [2023-01-28 10:04:18,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:04:18,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569230937] [2023-01-28 10:04:18,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:04:18,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:04:18,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:04:19,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:04:19,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:04:19,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569230937] [2023-01-28 10:04:19,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569230937] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:04:19,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852793613] [2023-01-28 10:04:19,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:04:19,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:19,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:04:19,242 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) [2023-01-28 10:04:19,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-28 10:04:19,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 10:04:19,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:04:19,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-28 10:04:19,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:04:19,444 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:04:19,445 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:19,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2023-01-28 10:04:19,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:04:19,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:04:19,548 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:19,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-01-28 10:04:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:04:19,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852793613] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:04:19,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:04:19,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 6] total 14 [2023-01-28 10:04:19,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856580219] [2023-01-28 10:04:19,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:04:19,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 10:04:19,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:04:19,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 10:04:19,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-01-28 10:04:19,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 206 [2023-01-28 10:04:19,601 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 172 transitions, 2182 flow. Second operand has 16 states, 16 states have (on average 69.25) internal successors, (1108), 16 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:19,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:04:19,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 206 [2023-01-28 10:04:19,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:04:20,040 INFO L130 PetriNetUnfolder]: 802/1441 cut-off events. [2023-01-28 10:04:20,040 INFO L131 PetriNetUnfolder]: For 13951/13951 co-relation queries the response was YES. [2023-01-28 10:04:20,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8558 conditions, 1441 events. 802/1441 cut-off events. For 13951/13951 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 7649 event pairs, 217 based on Foata normal form. 2/1443 useless extension candidates. Maximal degree in co-relation 8464. Up to 1285 conditions per place. [2023-01-28 10:04:20,050 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 177 selfloop transitions, 37 changer transitions 3/217 dead transitions. [2023-01-28 10:04:20,050 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 217 transitions, 2996 flow [2023-01-28 10:04:20,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 10:04:20,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 10:04:20,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1091 transitions. [2023-01-28 10:04:20,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35307443365695795 [2023-01-28 10:04:20,053 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1091 transitions. [2023-01-28 10:04:20,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1091 transitions. [2023-01-28 10:04:20,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:04:20,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1091 transitions. [2023-01-28 10:04:20,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 72.73333333333333) internal successors, (1091), 15 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:20,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:20,059 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:20,059 INFO L175 Difference]: Start difference. First operand has 177 places, 172 transitions, 2182 flow. Second operand 15 states and 1091 transitions. [2023-01-28 10:04:20,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 217 transitions, 2996 flow [2023-01-28 10:04:20,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 217 transitions, 2681 flow, removed 143 selfloop flow, removed 9 redundant places. [2023-01-28 10:04:20,112 INFO L231 Difference]: Finished difference. Result has 184 places, 178 transitions, 2162 flow [2023-01-28 10:04:20,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1867, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2162, PETRI_PLACES=184, PETRI_TRANSITIONS=178} [2023-01-28 10:04:20,113 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 163 predicate places. [2023-01-28 10:04:20,113 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 178 transitions, 2162 flow [2023-01-28 10:04:20,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 69.25) internal successors, (1108), 16 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:20,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:04:20,113 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:04:20,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-01-28 10:04:20,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:20,318 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:04:20,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:04:20,319 INFO L85 PathProgramCache]: Analyzing trace with hash 2106113381, now seen corresponding path program 22 times [2023-01-28 10:04:20,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:04:20,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301658139] [2023-01-28 10:04:20,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:04:20,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:04:20,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:04:20,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:04:20,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:04:20,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301658139] [2023-01-28 10:04:20,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301658139] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:04:20,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313661634] [2023-01-28 10:04:20,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:04:20,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:20,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:04:20,662 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) [2023-01-28 10:04:20,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-28 10:04:20,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:04:20,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:04:20,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-01-28 10:04:20,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:04:20,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:04:20,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:04:20,982 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:20,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-01-28 10:04:21,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:04:21,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313661634] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:04:21,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:04:21,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 13 [2023-01-28 10:04:21,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284419263] [2023-01-28 10:04:21,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:04:21,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 10:04:21,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:04:21,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 10:04:21,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-01-28 10:04:21,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 206 [2023-01-28 10:04:21,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 178 transitions, 2162 flow. Second operand has 15 states, 15 states have (on average 74.2) internal successors, (1113), 15 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:21,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:04:21,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 206 [2023-01-28 10:04:21,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:04:21,417 INFO L130 PetriNetUnfolder]: 842/1510 cut-off events. [2023-01-28 10:04:21,417 INFO L131 PetriNetUnfolder]: For 13580/13580 co-relation queries the response was YES. [2023-01-28 10:04:21,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8763 conditions, 1510 events. 842/1510 cut-off events. For 13580/13580 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8091 event pairs, 223 based on Foata normal form. 1/1511 useless extension candidates. Maximal degree in co-relation 8668. Up to 1408 conditions per place. [2023-01-28 10:04:21,427 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 172 selfloop transitions, 32 changer transitions 1/205 dead transitions. [2023-01-28 10:04:21,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 205 transitions, 2888 flow [2023-01-28 10:04:21,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 10:04:21,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 10:04:21,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 776 transitions. [2023-01-28 10:04:21,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3766990291262136 [2023-01-28 10:04:21,429 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 776 transitions. [2023-01-28 10:04:21,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 776 transitions. [2023-01-28 10:04:21,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:04:21,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 776 transitions. [2023-01-28 10:04:21,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 77.6) internal successors, (776), 10 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:21,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 206.0) internal successors, (2266), 11 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:21,433 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 206.0) internal successors, (2266), 11 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:21,433 INFO L175 Difference]: Start difference. First operand has 184 places, 178 transitions, 2162 flow. Second operand 10 states and 776 transitions. [2023-01-28 10:04:21,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 205 transitions, 2888 flow [2023-01-28 10:04:21,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 205 transitions, 2671 flow, removed 86 selfloop flow, removed 10 redundant places. [2023-01-28 10:04:21,490 INFO L231 Difference]: Finished difference. Result has 186 places, 187 transitions, 2289 flow [2023-01-28 10:04:21,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1945, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2289, PETRI_PLACES=186, PETRI_TRANSITIONS=187} [2023-01-28 10:04:21,491 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 165 predicate places. [2023-01-28 10:04:21,491 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 187 transitions, 2289 flow [2023-01-28 10:04:21,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 74.2) internal successors, (1113), 15 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:21,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:04:21,492 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:04:21,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-01-28 10:04:21,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-01-28 10:04:21,698 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:04:21,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:04:21,698 INFO L85 PathProgramCache]: Analyzing trace with hash -612048045, now seen corresponding path program 23 times [2023-01-28 10:04:21,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:04:21,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502918800] [2023-01-28 10:04:21,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:04:21,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:04:21,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:04:22,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:04:22,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:04:22,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502918800] [2023-01-28 10:04:22,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502918800] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:04:22,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669350503] [2023-01-28 10:04:22,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:04:22,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:22,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:04:22,070 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) [2023-01-28 10:04:22,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-28 10:04:22,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:04:22,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:04:22,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-28 10:04:22,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:04:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:04:22,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:04:22,367 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:22,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-01-28 10:04:22,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:04:22,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669350503] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:04:22,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:04:22,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 6] total 14 [2023-01-28 10:04:22,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037709599] [2023-01-28 10:04:22,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:04:22,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 10:04:22,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:04:22,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 10:04:22,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-01-28 10:04:22,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 206 [2023-01-28 10:04:22,438 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 187 transitions, 2289 flow. Second operand has 16 states, 16 states have (on average 69.1875) internal successors, (1107), 16 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:22,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:04:22,438 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 206 [2023-01-28 10:04:22,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:04:22,800 INFO L130 PetriNetUnfolder]: 864/1549 cut-off events. [2023-01-28 10:04:22,800 INFO L131 PetriNetUnfolder]: For 13315/13315 co-relation queries the response was YES. [2023-01-28 10:04:22,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8872 conditions, 1549 events. 864/1549 cut-off events. For 13315/13315 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 8374 event pairs, 257 based on Foata normal form. 1/1550 useless extension candidates. Maximal degree in co-relation 8775. Up to 1473 conditions per place. [2023-01-28 10:04:22,810 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 181 selfloop transitions, 26 changer transitions 1/208 dead transitions. [2023-01-28 10:04:22,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 208 transitions, 2945 flow [2023-01-28 10:04:22,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 10:04:22,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 10:04:22,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 722 transitions. [2023-01-28 10:04:22,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3504854368932039 [2023-01-28 10:04:22,818 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 722 transitions. [2023-01-28 10:04:22,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 722 transitions. [2023-01-28 10:04:22,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:04:22,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 722 transitions. [2023-01-28 10:04:22,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 72.2) internal successors, (722), 10 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:22,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 206.0) internal successors, (2266), 11 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:22,825 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 206.0) internal successors, (2266), 11 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:22,825 INFO L175 Difference]: Start difference. First operand has 186 places, 187 transitions, 2289 flow. Second operand 10 states and 722 transitions. [2023-01-28 10:04:22,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 208 transitions, 2945 flow [2023-01-28 10:04:22,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 208 transitions, 2689 flow, removed 112 selfloop flow, removed 7 redundant places. [2023-01-28 10:04:22,887 INFO L231 Difference]: Finished difference. Result has 191 places, 192 transitions, 2288 flow [2023-01-28 10:04:22,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=2061, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2288, PETRI_PLACES=191, PETRI_TRANSITIONS=192} [2023-01-28 10:04:22,892 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 170 predicate places. [2023-01-28 10:04:22,892 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 192 transitions, 2288 flow [2023-01-28 10:04:22,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 69.1875) internal successors, (1107), 16 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:22,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:04:22,893 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:04:22,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-01-28 10:04:23,097 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,SelfDestructingSolverStorable27 [2023-01-28 10:04:23,098 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:04:23,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:04:23,098 INFO L85 PathProgramCache]: Analyzing trace with hash -554497589, now seen corresponding path program 24 times [2023-01-28 10:04:23,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:04:23,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533577229] [2023-01-28 10:04:23,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:04:23,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:04:23,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:04:23,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:04:23,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:04:23,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533577229] [2023-01-28 10:04:23,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533577229] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:04:23,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949960655] [2023-01-28 10:04:23,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:04:23,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:23,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:04:23,540 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) [2023-01-28 10:04:23,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-28 10:04:23,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 10:04:23,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:04:23,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-01-28 10:04:23,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:04:23,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:04:23,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:04:23,851 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:23,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-01-28 10:04:23,900 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-28 10:04:23,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-01-28 10:04:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:04:23,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949960655] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:04:23,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:04:23,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 23 [2023-01-28 10:04:23,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484996046] [2023-01-28 10:04:23,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:04:23,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 10:04:23,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:04:23,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 10:04:23,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2023-01-28 10:04:23,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 10:04:23,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 192 transitions, 2288 flow. Second operand has 25 states, 25 states have (on average 62.0) internal successors, (1550), 25 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:23,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:04:23,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 10:04:23,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:04:24,509 INFO L130 PetriNetUnfolder]: 933/1673 cut-off events. [2023-01-28 10:04:24,509 INFO L131 PetriNetUnfolder]: For 16706/16706 co-relation queries the response was YES. [2023-01-28 10:04:24,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9864 conditions, 1673 events. 933/1673 cut-off events. For 16706/16706 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9218 event pairs, 268 based on Foata normal form. 2/1675 useless extension candidates. Maximal degree in co-relation 9765. Up to 1542 conditions per place. [2023-01-28 10:04:24,521 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 203 selfloop transitions, 39 changer transitions 2/244 dead transitions. [2023-01-28 10:04:24,521 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 244 transitions, 3420 flow [2023-01-28 10:04:24,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 10:04:24,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 10:04:24,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1045 transitions. [2023-01-28 10:04:24,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3170509708737864 [2023-01-28 10:04:24,531 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1045 transitions. [2023-01-28 10:04:24,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1045 transitions. [2023-01-28 10:04:24,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:04:24,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1045 transitions. [2023-01-28 10:04:24,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 65.3125) internal successors, (1045), 16 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:24,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:24,536 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:24,536 INFO L175 Difference]: Start difference. First operand has 191 places, 192 transitions, 2288 flow. Second operand 16 states and 1045 transitions. [2023-01-28 10:04:24,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 244 transitions, 3420 flow [2023-01-28 10:04:24,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 244 transitions, 3271 flow, removed 57 selfloop flow, removed 7 redundant places. [2023-01-28 10:04:24,595 INFO L231 Difference]: Finished difference. Result has 205 places, 211 transitions, 2754 flow [2023-01-28 10:04:24,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=2143, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2754, PETRI_PLACES=205, PETRI_TRANSITIONS=211} [2023-01-28 10:04:24,597 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 184 predicate places. [2023-01-28 10:04:24,597 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 211 transitions, 2754 flow [2023-01-28 10:04:24,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 62.0) internal successors, (1550), 25 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:24,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:04:24,598 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:04:24,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-01-28 10:04:24,803 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,SelfDestructingSolverStorable28 [2023-01-28 10:04:24,804 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:04:24,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:04:24,804 INFO L85 PathProgramCache]: Analyzing trace with hash -16642011, now seen corresponding path program 25 times [2023-01-28 10:04:24,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:04:24,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755880998] [2023-01-28 10:04:24,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:04:24,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:04:24,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:04:25,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:04:25,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:04:25,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755880998] [2023-01-28 10:04:25,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755880998] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:04:25,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102093779] [2023-01-28 10:04:25,268 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:04:25,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:25,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:04:25,270 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) [2023-01-28 10:04:25,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-28 10:04:25,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:04:25,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-01-28 10:04:25,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:04:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:04:25,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:04:25,594 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:25,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-01-28 10:04:25,635 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-28 10:04:25,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-01-28 10:04:25,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:04:25,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102093779] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:04:25,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:04:25,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 23 [2023-01-28 10:04:25,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486085993] [2023-01-28 10:04:25,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:04:25,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 10:04:25,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:04:25,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 10:04:25,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2023-01-28 10:04:25,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 10:04:25,696 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 211 transitions, 2754 flow. Second operand has 25 states, 25 states have (on average 62.0) internal successors, (1550), 25 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:25,696 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:04:25,696 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 10:04:25,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:04:26,416 INFO L130 PetriNetUnfolder]: 981/1761 cut-off events. [2023-01-28 10:04:26,416 INFO L131 PetriNetUnfolder]: For 20633/20633 co-relation queries the response was YES. [2023-01-28 10:04:26,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10753 conditions, 1761 events. 981/1761 cut-off events. For 20633/20633 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 9804 event pairs, 278 based on Foata normal form. 2/1763 useless extension candidates. Maximal degree in co-relation 10648. Up to 1598 conditions per place. [2023-01-28 10:04:26,429 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 212 selfloop transitions, 45 changer transitions 3/260 dead transitions. [2023-01-28 10:04:26,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 260 transitions, 3733 flow [2023-01-28 10:04:26,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 10:04:26,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 10:04:26,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1303 transitions. [2023-01-28 10:04:26,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3162621359223301 [2023-01-28 10:04:26,438 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1303 transitions. [2023-01-28 10:04:26,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1303 transitions. [2023-01-28 10:04:26,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:04:26,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1303 transitions. [2023-01-28 10:04:26,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 65.15) internal successors, (1303), 20 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:26,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 206.0) internal successors, (4326), 21 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:26,443 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 206.0) internal successors, (4326), 21 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:26,443 INFO L175 Difference]: Start difference. First operand has 205 places, 211 transitions, 2754 flow. Second operand 20 states and 1303 transitions. [2023-01-28 10:04:26,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 260 transitions, 3733 flow [2023-01-28 10:04:26,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 260 transitions, 3411 flow, removed 151 selfloop flow, removed 6 redundant places. [2023-01-28 10:04:26,523 INFO L231 Difference]: Finished difference. Result has 220 places, 217 transitions, 2788 flow [2023-01-28 10:04:26,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=2432, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2788, PETRI_PLACES=220, PETRI_TRANSITIONS=217} [2023-01-28 10:04:26,524 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 199 predicate places. [2023-01-28 10:04:26,524 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 217 transitions, 2788 flow [2023-01-28 10:04:26,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 62.0) internal successors, (1550), 25 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:26,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:04:26,524 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:04:26,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-01-28 10:04:26,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:26,730 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:04:26,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:04:26,730 INFO L85 PathProgramCache]: Analyzing trace with hash 687923611, now seen corresponding path program 26 times [2023-01-28 10:04:26,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:04:26,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247230476] [2023-01-28 10:04:26,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:04:26,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:04:26,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:04:27,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:04:27,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:04:27,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247230476] [2023-01-28 10:04:27,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247230476] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:04:27,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045517304] [2023-01-28 10:04:27,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:04:27,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:27,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:04:27,205 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) [2023-01-28 10:04:27,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-28 10:04:27,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:04:27,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:04:27,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-01-28 10:04:27,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:04:27,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:04:27,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:04:27,560 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:27,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-01-28 10:04:27,595 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-28 10:04:27,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-01-28 10:04:27,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:04:27,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045517304] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:04:27,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:04:27,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 22 [2023-01-28 10:04:27,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370264816] [2023-01-28 10:04:27,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:04:27,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 10:04:27,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:04:27,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 10:04:27,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2023-01-28 10:04:27,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 10:04:27,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 217 transitions, 2788 flow. Second operand has 24 states, 24 states have (on average 62.083333333333336) internal successors, (1490), 24 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:27,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:04:27,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 10:04:27,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:04:28,246 INFO L130 PetriNetUnfolder]: 1045/1877 cut-off events. [2023-01-28 10:04:28,246 INFO L131 PetriNetUnfolder]: For 23742/23742 co-relation queries the response was YES. [2023-01-28 10:04:28,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11497 conditions, 1877 events. 1045/1877 cut-off events. For 23742/23742 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 10628 event pairs, 303 based on Foata normal form. 2/1879 useless extension candidates. Maximal degree in co-relation 11388. Up to 1706 conditions per place. [2023-01-28 10:04:28,256 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 237 selfloop transitions, 35 changer transitions 3/275 dead transitions. [2023-01-28 10:04:28,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 275 transitions, 3975 flow [2023-01-28 10:04:28,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 10:04:28,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 10:04:28,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1117 transitions. [2023-01-28 10:04:28,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3189605939463164 [2023-01-28 10:04:28,258 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1117 transitions. [2023-01-28 10:04:28,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1117 transitions. [2023-01-28 10:04:28,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:04:28,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1117 transitions. [2023-01-28 10:04:28,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 65.70588235294117) internal successors, (1117), 17 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:28,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 206.0) internal successors, (3708), 18 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:28,262 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 206.0) internal successors, (3708), 18 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:28,262 INFO L175 Difference]: Start difference. First operand has 220 places, 217 transitions, 2788 flow. Second operand 17 states and 1117 transitions. [2023-01-28 10:04:28,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 275 transitions, 3975 flow [2023-01-28 10:04:28,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 275 transitions, 3693 flow, removed 110 selfloop flow, removed 14 redundant places. [2023-01-28 10:04:28,326 INFO L231 Difference]: Finished difference. Result has 224 places, 227 transitions, 3000 flow [2023-01-28 10:04:28,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=2506, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3000, PETRI_PLACES=224, PETRI_TRANSITIONS=227} [2023-01-28 10:04:28,327 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 203 predicate places. [2023-01-28 10:04:28,327 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 227 transitions, 3000 flow [2023-01-28 10:04:28,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 62.083333333333336) internal successors, (1490), 24 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:28,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:04:28,327 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:04:28,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-01-28 10:04:28,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:28,529 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:04:28,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:04:28,529 INFO L85 PathProgramCache]: Analyzing trace with hash -296912589, now seen corresponding path program 27 times [2023-01-28 10:04:28,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:04:28,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908873262] [2023-01-28 10:04:28,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:04:28,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:04:28,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:04:29,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:04:29,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:04:29,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908873262] [2023-01-28 10:04:29,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908873262] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:04:29,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397538619] [2023-01-28 10:04:29,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:04:29,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:29,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:04:29,132 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:04:29,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-01-28 10:04:29,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 10:04:29,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:04:29,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 78 conjunts are in the unsatisfiable core [2023-01-28 10:04:29,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:04:29,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:04:29,397 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 [2023-01-28 10:04:29,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:04:29,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:04:29,710 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:29,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 73 [2023-01-28 10:04:29,722 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:29,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 31 [2023-01-28 10:04:29,773 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:04:29,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:04:29,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397538619] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:04:29,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:04:29,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 28 [2023-01-28 10:04:29,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965969793] [2023-01-28 10:04:29,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:04:29,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-28 10:04:29,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:04:29,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-28 10:04:29,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=757, Unknown=7, NotChecked=0, Total=870 [2023-01-28 10:04:29,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 10:04:29,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 227 transitions, 3000 flow. Second operand has 30 states, 30 states have (on average 54.6) internal successors, (1638), 30 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:29,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:04:29,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 10:04:29,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:04:30,839 INFO L130 PetriNetUnfolder]: 1107/1990 cut-off events. [2023-01-28 10:04:30,840 INFO L131 PetriNetUnfolder]: For 27625/27625 co-relation queries the response was YES. [2023-01-28 10:04:30,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12380 conditions, 1990 events. 1107/1990 cut-off events. For 27625/27625 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 11464 event pairs, 309 based on Foata normal form. 1/1991 useless extension candidates. Maximal degree in co-relation 12268. Up to 1716 conditions per place. [2023-01-28 10:04:30,852 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 208 selfloop transitions, 62 changer transitions 1/271 dead transitions. [2023-01-28 10:04:30,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 271 transitions, 4204 flow [2023-01-28 10:04:30,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 10:04:30,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 10:04:30,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 878 transitions. [2023-01-28 10:04:30,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2841423948220065 [2023-01-28 10:04:30,854 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 878 transitions. [2023-01-28 10:04:30,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 878 transitions. [2023-01-28 10:04:30,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:04:30,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 878 transitions. [2023-01-28 10:04:30,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 58.53333333333333) internal successors, (878), 15 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:30,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:30,857 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:30,857 INFO L175 Difference]: Start difference. First operand has 224 places, 227 transitions, 3000 flow. Second operand 15 states and 878 transitions. [2023-01-28 10:04:30,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 271 transitions, 4204 flow [2023-01-28 10:04:30,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 271 transitions, 3814 flow, removed 177 selfloop flow, removed 10 redundant places. [2023-01-28 10:04:30,942 INFO L231 Difference]: Finished difference. Result has 231 places, 237 transitions, 3197 flow [2023-01-28 10:04:30,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=2612, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3197, PETRI_PLACES=231, PETRI_TRANSITIONS=237} [2023-01-28 10:04:30,942 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 210 predicate places. [2023-01-28 10:04:30,942 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 237 transitions, 3197 flow [2023-01-28 10:04:30,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 54.6) internal successors, (1638), 30 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:30,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:04:30,943 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:04:30,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-01-28 10:04:31,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:31,144 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:04:31,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:04:31,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1732503731, now seen corresponding path program 28 times [2023-01-28 10:04:31,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:04:31,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505175883] [2023-01-28 10:04:31,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:04:31,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:04:31,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:04:31,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:04:31,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:04:31,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505175883] [2023-01-28 10:04:31,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505175883] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:04:31,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545816261] [2023-01-28 10:04:31,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:04:31,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:31,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:04:31,679 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:04:31,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-01-28 10:04:31,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:04:31,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:04:31,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 92 conjunts are in the unsatisfiable core [2023-01-28 10:04:31,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:04:31,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 10:04:31,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 10:04:31,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:04:31,950 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 [2023-01-28 10:04:32,090 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:32,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-01-28 10:04:32,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:04:32,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:04:33,460 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (and (forall ((v_ArrVal_1029 (Array Int Int)) (v_subst_1 Int)) (or (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1029) c_~A~0.base))) (<= (+ (select .cse0 .cse1) c_~counter~0) (+ (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset (* 4 v_subst_1)))))) (<= c_~N~0 v_subst_1) (< (+ v_subst_1 1) c_~N~0))) (forall ((v_ArrVal_1029 (Array Int Int)) (v_subst_2 Int)) (or (< (+ v_subst_2 1) c_~N~0) (<= c_~N~0 v_subst_2) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1029) c_~A~0.base))) (< (+ (select .cse2 c_~A~0.offset) (select .cse2 (+ c_~A~0.offset (* 4 v_subst_2)))) (+ (select .cse2 .cse1) c_~counter~0 1))))))) is different from false [2023-01-28 10:04:33,485 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse1 (+ c_~A~0.offset .cse4 4)) (.cse2 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse4)))) (and (forall ((v_ArrVal_1029 (Array Int Int)) (v_subst_2 Int)) (or (< (+ v_subst_2 1) c_~N~0) (<= c_~N~0 v_subst_2) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1029) c_~A~0.base))) (< (+ (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset (* 4 v_subst_2)))) (+ (select .cse0 .cse1) .cse2 c_~counter~0 1))))) (forall ((v_ArrVal_1029 (Array Int Int)) (v_subst_1 Int)) (or (<= c_~N~0 v_subst_1) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1029) c_~A~0.base))) (<= (+ (select .cse3 .cse1) .cse2 c_~counter~0) (+ (select .cse3 c_~A~0.offset) (select .cse3 (+ c_~A~0.offset (* 4 v_subst_1)))))) (< (+ v_subst_1 1) c_~N~0)))))) is different from false [2023-01-28 10:04:33,556 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset)) (.cse2 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_1029 (Array Int Int)) (v_subst_1 Int)) (or (<= c_~N~0 v_subst_1) (< (+ v_subst_1 1) c_~N~0) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1029) c_~A~0.base))) (<= (+ .cse0 (select .cse1 .cse2) c_~counter~0) (+ (select .cse1 c_~A~0.offset) (select .cse1 (+ c_~A~0.offset (* 4 v_subst_1)))))))) (forall ((v_ArrVal_1029 (Array Int Int)) (v_subst_2 Int)) (or (< (+ v_subst_2 1) c_~N~0) (<= c_~N~0 v_subst_2) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1029) c_~A~0.base))) (< (+ (select .cse3 c_~A~0.offset) (select .cse3 (+ c_~A~0.offset (* 4 v_subst_2)))) (+ .cse0 (select .cse3 .cse2) c_~counter~0 1))))))) is different from false [2023-01-28 10:04:33,854 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:33,855 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 99 treesize of output 64 [2023-01-28 10:04:33,866 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:33,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 506 treesize of output 434 [2023-01-28 10:04:33,881 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:33,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 96 [2023-01-28 10:04:33,892 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:33,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 47 [2023-01-28 10:04:33,991 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:33,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 65 [2023-01-28 10:04:33,993 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:04:34,001 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2023-01-28 10:04:34,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 120 treesize of output 88 [2023-01-28 10:04:34,008 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 10:04:34,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 15 [2023-01-28 10:04:34,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-01-28 10:04:34,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545816261] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:04:34,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:04:34,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-01-28 10:04:34,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617153979] [2023-01-28 10:04:34,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:04:34,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-01-28 10:04:34,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:04:34,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-01-28 10:04:34,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=936, Unknown=3, NotChecked=192, Total=1260 [2023-01-28 10:04:34,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 10:04:34,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 237 transitions, 3197 flow. Second operand has 36 states, 36 states have (on average 54.55555555555556) internal successors, (1964), 36 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:34,087 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:04:34,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 10:04:34,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:04:40,026 INFO L130 PetriNetUnfolder]: 1239/2231 cut-off events. [2023-01-28 10:04:40,027 INFO L131 PetriNetUnfolder]: For 30310/30310 co-relation queries the response was YES. [2023-01-28 10:04:40,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13876 conditions, 2231 events. 1239/2231 cut-off events. For 30310/30310 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 13059 event pairs, 338 based on Foata normal form. 2/2233 useless extension candidates. Maximal degree in co-relation 13398. Up to 1941 conditions per place. [2023-01-28 10:04:40,043 INFO L137 encePairwiseOnDemand]: 194/206 looper letters, 230 selfloop transitions, 112 changer transitions 3/345 dead transitions. [2023-01-28 10:04:40,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 345 transitions, 5143 flow [2023-01-28 10:04:40,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-28 10:04:40,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-28 10:04:40,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1609 transitions. [2023-01-28 10:04:40,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2789528432732316 [2023-01-28 10:04:40,045 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1609 transitions. [2023-01-28 10:04:40,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1609 transitions. [2023-01-28 10:04:40,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:04:40,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1609 transitions. [2023-01-28 10:04:40,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 57.464285714285715) internal successors, (1609), 28 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:40,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 206.0) internal successors, (5974), 29 states have internal predecessors, (5974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:40,052 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 206.0) internal successors, (5974), 29 states have internal predecessors, (5974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:40,052 INFO L175 Difference]: Start difference. First operand has 231 places, 237 transitions, 3197 flow. Second operand 28 states and 1609 transitions. [2023-01-28 10:04:40,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 345 transitions, 5143 flow [2023-01-28 10:04:40,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 345 transitions, 4545 flow, removed 242 selfloop flow, removed 10 redundant places. [2023-01-28 10:04:40,153 INFO L231 Difference]: Finished difference. Result has 257 places, 299 transitions, 4029 flow [2023-01-28 10:04:40,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=2839, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=4029, PETRI_PLACES=257, PETRI_TRANSITIONS=299} [2023-01-28 10:04:40,154 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 236 predicate places. [2023-01-28 10:04:40,154 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 299 transitions, 4029 flow [2023-01-28 10:04:40,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 54.55555555555556) internal successors, (1964), 36 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:40,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:04:40,154 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:04:40,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-01-28 10:04:40,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-01-28 10:04:40,355 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:04:40,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:04:40,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1655123187, now seen corresponding path program 29 times [2023-01-28 10:04:40,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:04:40,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774648139] [2023-01-28 10:04:40,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:04:40,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:04:40,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:04:40,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:04:40,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:04:40,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774648139] [2023-01-28 10:04:40,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774648139] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:04:40,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785261751] [2023-01-28 10:04:40,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:04:40,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:40,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:04:40,967 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:04:40,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-01-28 10:04:41,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 10:04:41,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:04:41,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-28 10:04:41,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:04:41,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:04:41,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:04:41,329 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:41,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-01-28 10:04:41,371 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-28 10:04:41,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-01-28 10:04:41,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:04:41,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785261751] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:04:41,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:04:41,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 6] total 24 [2023-01-28 10:04:41,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715384257] [2023-01-28 10:04:41,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:04:41,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-28 10:04:41,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:04:41,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-28 10:04:41,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2023-01-28 10:04:41,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 10:04:41,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 299 transitions, 4029 flow. Second operand has 26 states, 26 states have (on average 54.84615384615385) internal successors, (1426), 26 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:41,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:04:41,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 10:04:41,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:04:42,260 INFO L130 PetriNetUnfolder]: 1287/2319 cut-off events. [2023-01-28 10:04:42,260 INFO L131 PetriNetUnfolder]: For 26591/26591 co-relation queries the response was YES. [2023-01-28 10:04:42,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14804 conditions, 2319 events. 1287/2319 cut-off events. For 26591/26591 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 13672 event pairs, 393 based on Foata normal form. 2/2321 useless extension candidates. Maximal degree in co-relation 14494. Up to 2129 conditions per place. [2023-01-28 10:04:42,274 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 285 selfloop transitions, 55 changer transitions 3/343 dead transitions. [2023-01-28 10:04:42,275 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 343 transitions, 5237 flow [2023-01-28 10:04:42,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 10:04:42,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 10:04:42,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 931 transitions. [2023-01-28 10:04:42,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2824635922330097 [2023-01-28 10:04:42,276 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 931 transitions. [2023-01-28 10:04:42,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 931 transitions. [2023-01-28 10:04:42,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:04:42,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 931 transitions. [2023-01-28 10:04:42,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 58.1875) internal successors, (931), 16 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:42,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:42,280 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 206.0) internal successors, (3502), 17 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:42,280 INFO L175 Difference]: Start difference. First operand has 257 places, 299 transitions, 4029 flow. Second operand 16 states and 931 transitions. [2023-01-28 10:04:42,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 343 transitions, 5237 flow [2023-01-28 10:04:42,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 343 transitions, 5162 flow, removed 16 selfloop flow, removed 6 redundant places. [2023-01-28 10:04:42,376 INFO L231 Difference]: Finished difference. Result has 268 places, 305 transitions, 4369 flow [2023-01-28 10:04:42,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=3954, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4369, PETRI_PLACES=268, PETRI_TRANSITIONS=305} [2023-01-28 10:04:42,376 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 247 predicate places. [2023-01-28 10:04:42,376 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 305 transitions, 4369 flow [2023-01-28 10:04:42,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 54.84615384615385) internal successors, (1426), 26 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:42,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:04:42,377 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:04:42,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-01-28 10:04:42,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:42,577 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:04:42,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:04:42,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1065444320, now seen corresponding path program 30 times [2023-01-28 10:04:42,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:04:42,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640224916] [2023-01-28 10:04:42,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:04:42,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:04:42,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:04:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:04:42,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:04:42,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640224916] [2023-01-28 10:04:42,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640224916] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:04:42,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149173876] [2023-01-28 10:04:42,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:04:42,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:42,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:04:42,661 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:04:42,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-01-28 10:04:42,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 10:04:42,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:04:42,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 10:04:42,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:04:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:04:42,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:04:42,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:04:42,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149173876] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:04:42,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:04:42,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-28 10:04:42,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981143126] [2023-01-28 10:04:42,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:04:42,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 10:04:42,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:04:42,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 10:04:42,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-01-28 10:04:42,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-28 10:04:42,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 305 transitions, 4369 flow. Second operand has 19 states, 19 states have (on average 77.05263157894737) internal successors, (1464), 19 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:42,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:04:42,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-28 10:04:42,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:04:43,883 INFO L130 PetriNetUnfolder]: 1964/3502 cut-off events. [2023-01-28 10:04:43,883 INFO L131 PetriNetUnfolder]: For 50367/50390 co-relation queries the response was YES. [2023-01-28 10:04:43,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22566 conditions, 3502 events. 1964/3502 cut-off events. For 50367/50390 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 22460 event pairs, 910 based on Foata normal form. 159/3646 useless extension candidates. Maximal degree in co-relation 22251. Up to 2048 conditions per place. [2023-01-28 10:04:43,925 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 389 selfloop transitions, 94 changer transitions 0/500 dead transitions. [2023-01-28 10:04:43,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 500 transitions, 7980 flow [2023-01-28 10:04:43,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 10:04:43,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 10:04:43,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 727 transitions. [2023-01-28 10:04:43,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39212513484358147 [2023-01-28 10:04:43,926 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 727 transitions. [2023-01-28 10:04:43,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 727 transitions. [2023-01-28 10:04:43,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:04:43,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 727 transitions. [2023-01-28 10:04:43,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 80.77777777777777) internal successors, (727), 9 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:43,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 206.0) internal successors, (2060), 10 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:43,929 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 206.0) internal successors, (2060), 10 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:43,929 INFO L175 Difference]: Start difference. First operand has 268 places, 305 transitions, 4369 flow. Second operand 9 states and 727 transitions. [2023-01-28 10:04:43,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 500 transitions, 7980 flow [2023-01-28 10:04:44,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 500 transitions, 7454 flow, removed 229 selfloop flow, removed 11 redundant places. [2023-01-28 10:04:44,141 INFO L231 Difference]: Finished difference. Result has 267 places, 366 transitions, 5281 flow [2023-01-28 10:04:44,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=4014, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5281, PETRI_PLACES=267, PETRI_TRANSITIONS=366} [2023-01-28 10:04:44,142 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 246 predicate places. [2023-01-28 10:04:44,142 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 366 transitions, 5281 flow [2023-01-28 10:04:44,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 77.05263157894737) internal successors, (1464), 19 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:44,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:04:44,142 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:04:44,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-01-28 10:04:44,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:44,347 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:04:44,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:04:44,347 INFO L85 PathProgramCache]: Analyzing trace with hash -204995997, now seen corresponding path program 31 times [2023-01-28 10:04:44,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:04:44,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682100296] [2023-01-28 10:04:44,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:04:44,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:04:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:04:44,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:04:44,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:04:44,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682100296] [2023-01-28 10:04:44,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682100296] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:04:44,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693512582] [2023-01-28 10:04:44,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:04:44,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:44,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:04:44,437 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:04:44,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-01-28 10:04:44,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:04:44,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 10:04:44,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:04:44,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:04:44,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:04:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:04:44,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693512582] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:04:44,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:04:44,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-28 10:04:44,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263169347] [2023-01-28 10:04:44,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:04:44,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 10:04:44,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:04:44,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 10:04:44,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-01-28 10:04:44,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-28 10:04:44,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 366 transitions, 5281 flow. Second operand has 19 states, 19 states have (on average 76.89473684210526) internal successors, (1461), 19 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:44,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:04:44,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-28 10:04:44,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:04:45,231 INFO L130 PetriNetUnfolder]: 1451/2682 cut-off events. [2023-01-28 10:04:45,231 INFO L131 PetriNetUnfolder]: For 34806/34824 co-relation queries the response was YES. [2023-01-28 10:04:45,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17585 conditions, 2682 events. 1451/2682 cut-off events. For 34806/34824 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 17010 event pairs, 390 based on Foata normal form. 154/2820 useless extension candidates. Maximal degree in co-relation 17284. Up to 1037 conditions per place. [2023-01-28 10:04:45,256 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 368 selfloop transitions, 55 changer transitions 0/440 dead transitions. [2023-01-28 10:04:45,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 440 transitions, 7045 flow [2023-01-28 10:04:45,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 10:04:45,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 10:04:45,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 805 transitions. [2023-01-28 10:04:45,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3907766990291262 [2023-01-28 10:04:45,258 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 805 transitions. [2023-01-28 10:04:45,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 805 transitions. [2023-01-28 10:04:45,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:04:45,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 805 transitions. [2023-01-28 10:04:45,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 80.5) internal successors, (805), 10 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:45,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 206.0) internal successors, (2266), 11 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:45,261 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 206.0) internal successors, (2266), 11 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:45,261 INFO L175 Difference]: Start difference. First operand has 267 places, 366 transitions, 5281 flow. Second operand 10 states and 805 transitions. [2023-01-28 10:04:45,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 440 transitions, 7045 flow [2023-01-28 10:04:45,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 440 transitions, 6788 flow, removed 125 selfloop flow, removed 4 redundant places. [2023-01-28 10:04:45,404 INFO L231 Difference]: Finished difference. Result has 274 places, 326 transitions, 4627 flow [2023-01-28 10:04:45,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=4467, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4627, PETRI_PLACES=274, PETRI_TRANSITIONS=326} [2023-01-28 10:04:45,404 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 253 predicate places. [2023-01-28 10:04:45,404 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 326 transitions, 4627 flow [2023-01-28 10:04:45,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 76.89473684210526) internal successors, (1461), 19 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:45,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:04:45,405 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:04:45,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-01-28 10:04:45,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-01-28 10:04:45,605 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:04:45,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:04:45,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1422006612, now seen corresponding path program 32 times [2023-01-28 10:04:45,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:04:45,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695276235] [2023-01-28 10:04:45,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:04:45,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:04:45,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:04:45,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:04:45,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:04:45,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695276235] [2023-01-28 10:04:45,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695276235] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:04:45,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832364092] [2023-01-28 10:04:45,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:04:45,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:45,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:04:45,697 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:04:45,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-01-28 10:04:45,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:04:45,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:04:45,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 10:04:45,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:04:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:04:45,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:04:45,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:04:45,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832364092] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:04:45,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:04:45,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-28 10:04:45,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241522121] [2023-01-28 10:04:45,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:04:45,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 10:04:45,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:04:45,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 10:04:45,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-01-28 10:04:45,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-28 10:04:45,944 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 326 transitions, 4627 flow. Second operand has 19 states, 19 states have (on average 76.89473684210526) internal successors, (1461), 19 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:45,944 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:04:45,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-28 10:04:45,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:04:46,476 INFO L130 PetriNetUnfolder]: 1170/2263 cut-off events. [2023-01-28 10:04:46,476 INFO L131 PetriNetUnfolder]: For 24607/24618 co-relation queries the response was YES. [2023-01-28 10:04:46,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14586 conditions, 2263 events. 1170/2263 cut-off events. For 24607/24618 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14439 event pairs, 266 based on Foata normal form. 163/2426 useless extension candidates. Maximal degree in co-relation 14260. Up to 835 conditions per place. [2023-01-28 10:04:46,494 INFO L137 encePairwiseOnDemand]: 200/206 looper letters, 311 selfloop transitions, 5 changer transitions 113/434 dead transitions. [2023-01-28 10:04:46,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 434 transitions, 6584 flow [2023-01-28 10:04:46,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 10:04:46,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 10:04:46,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 804 transitions. [2023-01-28 10:04:46,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39029126213592236 [2023-01-28 10:04:46,495 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 804 transitions. [2023-01-28 10:04:46,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 804 transitions. [2023-01-28 10:04:46,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:04:46,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 804 transitions. [2023-01-28 10:04:46,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 80.4) internal successors, (804), 10 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:46,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 206.0) internal successors, (2266), 11 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:46,497 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 206.0) internal successors, (2266), 11 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:46,497 INFO L175 Difference]: Start difference. First operand has 274 places, 326 transitions, 4627 flow. Second operand 10 states and 804 transitions. [2023-01-28 10:04:46,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 434 transitions, 6584 flow [2023-01-28 10:04:46,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 434 transitions, 6187 flow, removed 43 selfloop flow, removed 8 redundant places. [2023-01-28 10:04:46,596 INFO L231 Difference]: Finished difference. Result has 279 places, 246 transitions, 3205 flow [2023-01-28 10:04:46,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=4214, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3205, PETRI_PLACES=279, PETRI_TRANSITIONS=246} [2023-01-28 10:04:46,597 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 258 predicate places. [2023-01-28 10:04:46,597 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 246 transitions, 3205 flow [2023-01-28 10:04:46,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 76.89473684210526) internal successors, (1461), 19 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:46,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:04:46,598 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:04:46,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-01-28 10:04:46,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-01-28 10:04:46,798 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:04:46,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:04:46,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1517944512, now seen corresponding path program 33 times [2023-01-28 10:04:46,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:04:46,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457162279] [2023-01-28 10:04:46,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:04:46,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:04:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:04:46,897 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:04:46,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:04:46,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457162279] [2023-01-28 10:04:46,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457162279] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:04:46,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406334283] [2023-01-28 10:04:46,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:04:46,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:46,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:04:46,899 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:04:46,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-01-28 10:04:47,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 10:04:47,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:04:47,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 10:04:47,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:04:47,096 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:04:47,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:04:47,161 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:04:47,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406334283] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:04:47,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:04:47,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-28 10:04:47,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444731848] [2023-01-28 10:04:47,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:04:47,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 10:04:47,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:04:47,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 10:04:47,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-01-28 10:04:47,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 206 [2023-01-28 10:04:47,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 246 transitions, 3205 flow. Second operand has 19 states, 19 states have (on average 76.84210526315789) internal successors, (1460), 19 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:47,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:04:47,164 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 206 [2023-01-28 10:04:47,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:04:47,423 INFO L130 PetriNetUnfolder]: 668/1171 cut-off events. [2023-01-28 10:04:47,423 INFO L131 PetriNetUnfolder]: For 15837/15840 co-relation queries the response was YES. [2023-01-28 10:04:47,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8475 conditions, 1171 events. 668/1171 cut-off events. For 15837/15840 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5539 event pairs, 191 based on Foata normal form. 121/1292 useless extension candidates. Maximal degree in co-relation 8353. Up to 780 conditions per place. [2023-01-28 10:04:47,433 INFO L137 encePairwiseOnDemand]: 201/206 looper letters, 168 selfloop transitions, 90 changer transitions 0/263 dead transitions. [2023-01-28 10:04:47,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 263 transitions, 4019 flow [2023-01-28 10:04:47,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 10:04:47,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 10:04:47,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 713 transitions. [2023-01-28 10:04:47,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38457389428263217 [2023-01-28 10:04:47,442 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 713 transitions. [2023-01-28 10:04:47,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 713 transitions. [2023-01-28 10:04:47,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:04:47,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 713 transitions. [2023-01-28 10:04:47,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 79.22222222222223) internal successors, (713), 9 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:47,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 206.0) internal successors, (2060), 10 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:47,444 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 206.0) internal successors, (2060), 10 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:47,444 INFO L175 Difference]: Start difference. First operand has 279 places, 246 transitions, 3205 flow. Second operand 9 states and 713 transitions. [2023-01-28 10:04:47,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 263 transitions, 4019 flow [2023-01-28 10:04:47,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 263 transitions, 3373 flow, removed 226 selfloop flow, removed 35 redundant places. [2023-01-28 10:04:47,518 INFO L231 Difference]: Finished difference. Result has 234 places, 248 transitions, 2902 flow [2023-01-28 10:04:47,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=2579, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2902, PETRI_PLACES=234, PETRI_TRANSITIONS=248} [2023-01-28 10:04:47,518 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 213 predicate places. [2023-01-28 10:04:47,518 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 248 transitions, 2902 flow [2023-01-28 10:04:47,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 76.84210526315789) internal successors, (1460), 19 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:47,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:04:47,519 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:04:47,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-01-28 10:04:47,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-01-28 10:04:47,719 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:04:47,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:04:47,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1248224389, now seen corresponding path program 34 times [2023-01-28 10:04:47,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:04:47,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099318473] [2023-01-28 10:04:47,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:04:47,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:04:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:04:48,536 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:04:48,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:04:48,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099318473] [2023-01-28 10:04:48,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099318473] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:04:48,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332685901] [2023-01-28 10:04:48,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:04:48,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:48,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:04:48,537 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:04:48,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-01-28 10:04:48,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:04:48,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:04:48,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 116 conjunts are in the unsatisfiable core [2023-01-28 10:04:48,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:04:48,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:04:48,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-01-28 10:04:49,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:04:49,096 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:49,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-01-28 10:04:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:04:49,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:04:49,707 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (and (forall ((v_ArrVal_1246 (Array Int Int)) (v_subst_3 Int)) (or (<= c_~N~0 (+ v_subst_3 1)) (< (+ 2 v_subst_3) c_~N~0) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1246) c_~A~0.base))) (<= (+ (select .cse0 .cse1) c_~counter~0) (let ((.cse2 (* 4 v_subst_3))) (+ (select .cse0 (+ c_~A~0.offset .cse2)) (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset .cse2 4)))))))) (forall ((v_ArrVal_1246 (Array Int Int)) (v_subst_4 Int)) (or (<= c_~N~0 (+ v_subst_4 1)) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1246) c_~A~0.base))) (< (let ((.cse4 (* 4 v_subst_4))) (+ (select .cse3 (+ c_~A~0.offset .cse4)) (select .cse3 (+ c_~A~0.offset .cse4 4)) (select .cse3 c_~A~0.offset))) (+ (select .cse3 .cse1) c_~counter~0 1))) (< (+ 2 v_subst_4) c_~N~0))))) is different from false [2023-01-28 10:04:49,737 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse6))) (.cse2 (+ c_~A~0.offset .cse6 4))) (and (forall ((v_ArrVal_1246 (Array Int Int)) (v_subst_3 Int)) (or (<= c_~N~0 (+ v_subst_3 1)) (< (+ 2 v_subst_3) c_~N~0) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1246) c_~A~0.base))) (<= (+ .cse0 c_~counter~0 (select .cse1 .cse2)) (let ((.cse3 (* 4 v_subst_3))) (+ (select .cse1 (+ c_~A~0.offset .cse3)) (select .cse1 c_~A~0.offset) (select .cse1 (+ c_~A~0.offset .cse3 4)))))))) (forall ((v_ArrVal_1246 (Array Int Int)) (v_subst_4 Int)) (or (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1246) c_~A~0.base))) (< (let ((.cse5 (* 4 v_subst_4))) (+ (select .cse4 (+ c_~A~0.offset .cse5)) (select .cse4 (+ c_~A~0.offset .cse5 4)) (select .cse4 c_~A~0.offset))) (+ .cse0 c_~counter~0 (select .cse4 .cse2) 1))) (<= c_~N~0 (+ v_subst_4 1)) (< (+ 2 v_subst_4) c_~N~0)))))) is different from false [2023-01-28 10:04:49,791 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:49,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 116 treesize of output 154 [2023-01-28 10:04:49,827 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:49,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 63 [2023-01-28 10:04:50,697 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:04:50,756 INFO L321 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-01-28 10:04:50,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 66 [2023-01-28 10:04:51,089 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-01-28 10:04:51,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332685901] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:04:51,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:04:51,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-01-28 10:04:51,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013128040] [2023-01-28 10:04:51,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:04:51,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-01-28 10:04:51,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:04:51,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-01-28 10:04:51,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1639, Unknown=2, NotChecked=166, Total=1980 [2023-01-28 10:04:51,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 206 [2023-01-28 10:04:51,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 248 transitions, 2902 flow. Second operand has 45 states, 45 states have (on average 57.355555555555554) internal successors, (2581), 45 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:51,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:04:51,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 206 [2023-01-28 10:04:51,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:04:53,402 INFO L130 PetriNetUnfolder]: 924/1680 cut-off events. [2023-01-28 10:04:53,402 INFO L131 PetriNetUnfolder]: For 25949/25949 co-relation queries the response was YES. [2023-01-28 10:04:53,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12552 conditions, 1680 events. 924/1680 cut-off events. For 25949/25949 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9015 event pairs, 36 based on Foata normal form. 2/1682 useless extension candidates. Maximal degree in co-relation 12262. Up to 965 conditions per place. [2023-01-28 10:04:53,416 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 267 selfloop transitions, 197 changer transitions 9/473 dead transitions. [2023-01-28 10:04:53,416 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 473 transitions, 6648 flow [2023-01-28 10:04:53,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-01-28 10:04:53,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-01-28 10:04:53,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2669 transitions. [2023-01-28 10:04:53,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2944616063548102 [2023-01-28 10:04:53,451 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2669 transitions. [2023-01-28 10:04:53,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2669 transitions. [2023-01-28 10:04:53,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:04:53,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2669 transitions. [2023-01-28 10:04:53,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 60.65909090909091) internal successors, (2669), 44 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:53,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 206.0) internal successors, (9270), 45 states have internal predecessors, (9270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:53,460 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 206.0) internal successors, (9270), 45 states have internal predecessors, (9270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:53,461 INFO L175 Difference]: Start difference. First operand has 234 places, 248 transitions, 2902 flow. Second operand 44 states and 2669 transitions. [2023-01-28 10:04:53,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 473 transitions, 6648 flow [2023-01-28 10:04:53,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 473 transitions, 6386 flow, removed 37 selfloop flow, removed 7 redundant places. [2023-01-28 10:04:53,546 INFO L231 Difference]: Finished difference. Result has 278 places, 371 transitions, 5578 flow [2023-01-28 10:04:53,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=2754, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=5578, PETRI_PLACES=278, PETRI_TRANSITIONS=371} [2023-01-28 10:04:53,548 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 257 predicate places. [2023-01-28 10:04:53,548 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 371 transitions, 5578 flow [2023-01-28 10:04:53,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 57.355555555555554) internal successors, (2581), 45 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:53,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:04:53,549 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:04:53,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-01-28 10:04:53,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-01-28 10:04:53,753 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:04:53,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:04:53,753 INFO L85 PathProgramCache]: Analyzing trace with hash -564186213, now seen corresponding path program 35 times [2023-01-28 10:04:53,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:04:53,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130601298] [2023-01-28 10:04:53,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:04:53,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:04:53,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:04:54,601 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:04:54,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:04:54,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130601298] [2023-01-28 10:04:54,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130601298] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:04:54,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966229741] [2023-01-28 10:04:54,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:04:54,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:54,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:04:54,602 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:04:54,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-01-28 10:04:54,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 10:04:54,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:04:54,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-01-28 10:04:54,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:04:54,950 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:04:54,951 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:04:54,954 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:54,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 23 [2023-01-28 10:04:54,971 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:04:54,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:04:55,184 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:55,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-01-28 10:04:55,381 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:04:55,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966229741] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:04:55,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:04:55,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 29 [2023-01-28 10:04:55,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026208657] [2023-01-28 10:04:55,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:04:55,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 10:04:55,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:04:55,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 10:04:55,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2023-01-28 10:04:55,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 10:04:55,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 371 transitions, 5578 flow. Second operand has 31 states, 31 states have (on average 54.806451612903224) internal successors, (1699), 31 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:55,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:04:55,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 10:04:55,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:04:56,517 INFO L130 PetriNetUnfolder]: 1004/1816 cut-off events. [2023-01-28 10:04:56,517 INFO L131 PetriNetUnfolder]: For 32473/32473 co-relation queries the response was YES. [2023-01-28 10:04:56,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14495 conditions, 1816 events. 1004/1816 cut-off events. For 32473/32473 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9859 event pairs, 168 based on Foata normal form. 1/1817 useless extension candidates. Maximal degree in co-relation 14367. Up to 1500 conditions per place. [2023-01-28 10:04:56,531 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 304 selfloop transitions, 138 changer transitions 1/443 dead transitions. [2023-01-28 10:04:56,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 443 transitions, 7344 flow [2023-01-28 10:04:56,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-01-28 10:04:56,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-01-28 10:04:56,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1431 transitions. [2023-01-28 10:04:56,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2778640776699029 [2023-01-28 10:04:56,534 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1431 transitions. [2023-01-28 10:04:56,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1431 transitions. [2023-01-28 10:04:56,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:04:56,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1431 transitions. [2023-01-28 10:04:56,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 57.24) internal successors, (1431), 25 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:56,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 206.0) internal successors, (5356), 26 states have internal predecessors, (5356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:56,540 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 206.0) internal successors, (5356), 26 states have internal predecessors, (5356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:56,540 INFO L175 Difference]: Start difference. First operand has 278 places, 371 transitions, 5578 flow. Second operand 25 states and 1431 transitions. [2023-01-28 10:04:56,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 443 transitions, 7344 flow [2023-01-28 10:04:56,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 443 transitions, 6309 flow, removed 462 selfloop flow, removed 15 redundant places. [2023-01-28 10:04:56,660 INFO L231 Difference]: Finished difference. Result has 294 places, 406 transitions, 5650 flow [2023-01-28 10:04:56,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=4649, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5650, PETRI_PLACES=294, PETRI_TRANSITIONS=406} [2023-01-28 10:04:56,660 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 273 predicate places. [2023-01-28 10:04:56,660 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 406 transitions, 5650 flow [2023-01-28 10:04:56,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 54.806451612903224) internal successors, (1699), 31 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:56,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:04:56,661 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:04:56,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-01-28 10:04:56,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-01-28 10:04:56,867 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:04:56,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:04:56,867 INFO L85 PathProgramCache]: Analyzing trace with hash 966993389, now seen corresponding path program 36 times [2023-01-28 10:04:56,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:04:56,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206117115] [2023-01-28 10:04:56,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:04:56,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:04:56,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:04:57,653 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:04:57,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:04:57,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206117115] [2023-01-28 10:04:57,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206117115] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:04:57,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509819041] [2023-01-28 10:04:57,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:04:57,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:04:57,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:04:57,655 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:04:57,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-01-28 10:04:57,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 10:04:57,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:04:57,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-01-28 10:04:57,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:04:58,012 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:04:58,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:04:58,013 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:04:58,016 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:58,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 23 [2023-01-28 10:04:58,031 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:04:58,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:04:58,231 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:04:58,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-01-28 10:04:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:04:58,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509819041] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:04:58,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:04:58,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 29 [2023-01-28 10:04:58,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252038448] [2023-01-28 10:04:58,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:04:58,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 10:04:58,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:04:58,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 10:04:58,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2023-01-28 10:04:58,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 10:04:58,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 406 transitions, 5650 flow. Second operand has 31 states, 31 states have (on average 61.87096774193548) internal successors, (1918), 31 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:58,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:04:58,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 10:04:58,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:04:59,637 INFO L130 PetriNetUnfolder]: 1087/1965 cut-off events. [2023-01-28 10:04:59,637 INFO L131 PetriNetUnfolder]: For 27325/27325 co-relation queries the response was YES. [2023-01-28 10:04:59,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14919 conditions, 1965 events. 1087/1965 cut-off events. For 27325/27325 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10921 event pairs, 168 based on Foata normal form. 2/1967 useless extension candidates. Maximal degree in co-relation 14797. Up to 1595 conditions per place. [2023-01-28 10:04:59,652 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 327 selfloop transitions, 154 changer transitions 2/483 dead transitions. [2023-01-28 10:04:59,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 483 transitions, 7729 flow [2023-01-28 10:04:59,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-28 10:04:59,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-28 10:04:59,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1936 transitions. [2023-01-28 10:04:59,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3132686084142395 [2023-01-28 10:04:59,654 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1936 transitions. [2023-01-28 10:04:59,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1936 transitions. [2023-01-28 10:04:59,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:04:59,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1936 transitions. [2023-01-28 10:04:59,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 64.53333333333333) internal successors, (1936), 30 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:59,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 206.0) internal successors, (6386), 31 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:59,661 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 206.0) internal successors, (6386), 31 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:59,661 INFO L175 Difference]: Start difference. First operand has 294 places, 406 transitions, 5650 flow. Second operand 30 states and 1936 transitions. [2023-01-28 10:04:59,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 483 transitions, 7729 flow [2023-01-28 10:04:59,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 483 transitions, 7275 flow, removed 169 selfloop flow, removed 12 redundant places. [2023-01-28 10:04:59,762 INFO L231 Difference]: Finished difference. Result has 316 places, 431 transitions, 6443 flow [2023-01-28 10:04:59,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=5196, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=6443, PETRI_PLACES=316, PETRI_TRANSITIONS=431} [2023-01-28 10:04:59,763 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 295 predicate places. [2023-01-28 10:04:59,764 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 431 transitions, 6443 flow [2023-01-28 10:04:59,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 61.87096774193548) internal successors, (1918), 31 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:04:59,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:04:59,764 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:04:59,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-01-28 10:04:59,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-01-28 10:04:59,964 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:04:59,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:04:59,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1143816677, now seen corresponding path program 37 times [2023-01-28 10:04:59,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:04:59,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650369800] [2023-01-28 10:04:59,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:04:59,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:04:59,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:05:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:05:00,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:05:00,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650369800] [2023-01-28 10:05:00,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650369800] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:05:00,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828836187] [2023-01-28 10:05:00,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:05:00,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:05:00,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:05:00,666 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:05:00,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-01-28 10:05:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:05:00,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-01-28 10:05:00,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:05:00,995 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:05:00,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:05:01,200 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:05:01,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-01-28 10:05:01,361 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:05:01,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828836187] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:05:01,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:05:01,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 30 [2023-01-28 10:05:01,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968341745] [2023-01-28 10:05:01,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:05:01,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 10:05:01,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:05:01,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 10:05:01,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2023-01-28 10:05:01,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 10:05:01,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 431 transitions, 6443 flow. Second operand has 32 states, 32 states have (on average 61.84375) internal successors, (1979), 32 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:01,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:05:01,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 10:05:01,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:05:02,712 INFO L130 PetriNetUnfolder]: 1211/2202 cut-off events. [2023-01-28 10:05:02,712 INFO L131 PetriNetUnfolder]: For 40025/40025 co-relation queries the response was YES. [2023-01-28 10:05:02,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17834 conditions, 2202 events. 1211/2202 cut-off events. For 40025/40025 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12532 event pairs, 197 based on Foata normal form. 3/2205 useless extension candidates. Maximal degree in co-relation 17707. Up to 1636 conditions per place. [2023-01-28 10:05:02,730 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 335 selfloop transitions, 192 changer transitions 4/531 dead transitions. [2023-01-28 10:05:02,730 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 531 transitions, 9164 flow [2023-01-28 10:05:02,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-28 10:05:02,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-28 10:05:02,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1894 transitions. [2023-01-28 10:05:02,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3170405088717777 [2023-01-28 10:05:02,734 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1894 transitions. [2023-01-28 10:05:02,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1894 transitions. [2023-01-28 10:05:02,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:05:02,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1894 transitions. [2023-01-28 10:05:02,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 65.3103448275862) internal successors, (1894), 29 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) [2023-01-28 10:05:02,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 206.0) internal successors, (6180), 30 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:02,740 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 206.0) internal successors, (6180), 30 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:02,741 INFO L175 Difference]: Start difference. First operand has 316 places, 431 transitions, 6443 flow. Second operand 29 states and 1894 transitions. [2023-01-28 10:05:02,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 531 transitions, 9164 flow [2023-01-28 10:05:02,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 531 transitions, 8352 flow, removed 321 selfloop flow, removed 17 redundant places. [2023-01-28 10:05:02,864 INFO L231 Difference]: Finished difference. Result has 333 places, 462 transitions, 7408 flow [2023-01-28 10:05:02,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=5631, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=7408, PETRI_PLACES=333, PETRI_TRANSITIONS=462} [2023-01-28 10:05:02,865 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 312 predicate places. [2023-01-28 10:05:02,865 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 462 transitions, 7408 flow [2023-01-28 10:05:02,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 61.84375) internal successors, (1979), 32 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:02,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:05:02,865 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:05:02,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-01-28 10:05:03,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-01-28 10:05:03,066 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:05:03,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:05:03,066 INFO L85 PathProgramCache]: Analyzing trace with hash 289376107, now seen corresponding path program 38 times [2023-01-28 10:05:03,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:05:03,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42196467] [2023-01-28 10:05:03,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:05:03,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:05:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:05:03,902 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:05:03,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:05:03,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42196467] [2023-01-28 10:05:03,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42196467] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:05:03,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885190063] [2023-01-28 10:05:03,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:05:03,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:05:03,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:05:03,904 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:05:03,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-01-28 10:05:04,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:05:04,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:05:04,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 107 conjunts are in the unsatisfiable core [2023-01-28 10:05:04,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:05:04,276 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:05:04,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2023-01-28 10:05:04,324 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:05:04,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:05:04,690 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:05:04,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 104 [2023-01-28 10:05:05,142 INFO L321 Elim1Store]: treesize reduction 80, result has 14.0 percent of original size [2023-01-28 10:05:05,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 23 [2023-01-28 10:05:05,357 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:05:05,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885190063] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:05:05,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:05:05,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2023-01-28 10:05:05,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269087989] [2023-01-28 10:05:05,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:05:05,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-28 10:05:05,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:05:05,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-28 10:05:05,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2023-01-28 10:05:05,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 10:05:05,360 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 462 transitions, 7408 flow. Second operand has 34 states, 34 states have (on average 61.411764705882355) internal successors, (2088), 34 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:05,360 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:05:05,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 10:05:05,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:05:06,652 INFO L130 PetriNetUnfolder]: 1253/2280 cut-off events. [2023-01-28 10:05:06,652 INFO L131 PetriNetUnfolder]: For 41516/41516 co-relation queries the response was YES. [2023-01-28 10:05:06,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18203 conditions, 2280 events. 1253/2280 cut-off events. For 41516/41516 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13073 event pairs, 231 based on Foata normal form. 2/2282 useless extension candidates. Maximal degree in co-relation 18070. Up to 1846 conditions per place. [2023-01-28 10:05:06,668 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 315 selfloop transitions, 193 changer transitions 2/510 dead transitions. [2023-01-28 10:05:06,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 510 transitions, 9143 flow [2023-01-28 10:05:06,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-01-28 10:05:06,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-01-28 10:05:06,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1604 transitions. [2023-01-28 10:05:06,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31145631067961166 [2023-01-28 10:05:06,671 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1604 transitions. [2023-01-28 10:05:06,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1604 transitions. [2023-01-28 10:05:06,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:05:06,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1604 transitions. [2023-01-28 10:05:06,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 64.16) internal successors, (1604), 25 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:06,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 206.0) internal successors, (5356), 26 states have internal predecessors, (5356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:06,676 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 206.0) internal successors, (5356), 26 states have internal predecessors, (5356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:06,676 INFO L175 Difference]: Start difference. First operand has 333 places, 462 transitions, 7408 flow. Second operand 25 states and 1604 transitions. [2023-01-28 10:05:06,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 510 transitions, 9143 flow [2023-01-28 10:05:06,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 510 transitions, 8167 flow, removed 400 selfloop flow, removed 20 redundant places. [2023-01-28 10:05:06,815 INFO L231 Difference]: Finished difference. Result has 339 places, 478 transitions, 7393 flow [2023-01-28 10:05:06,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=6474, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=7393, PETRI_PLACES=339, PETRI_TRANSITIONS=478} [2023-01-28 10:05:06,816 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 318 predicate places. [2023-01-28 10:05:06,816 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 478 transitions, 7393 flow [2023-01-28 10:05:06,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 61.411764705882355) internal successors, (2088), 34 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:06,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:05:06,817 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:05:06,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-01-28 10:05:07,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-01-28 10:05:07,018 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:05:07,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:05:07,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1083728057, now seen corresponding path program 39 times [2023-01-28 10:05:07,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:05:07,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704198551] [2023-01-28 10:05:07,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:05:07,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:05:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:05:07,971 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:05:07,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:05:07,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704198551] [2023-01-28 10:05:07,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704198551] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:05:07,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498792599] [2023-01-28 10:05:07,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:05:07,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:05:07,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:05:07,973 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:05:07,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-01-28 10:05:08,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 10:05:08,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:05:08,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 106 conjunts are in the unsatisfiable core [2023-01-28 10:05:08,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:05:08,561 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:05:08,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2023-01-28 10:05:08,617 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:05:08,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:05:09,475 INFO L321 Elim1Store]: treesize reduction 38, result has 65.8 percent of original size [2023-01-28 10:05:09,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 83 [2023-01-28 10:05:09,566 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 10:05:09,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 11 [2023-01-28 10:05:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:05:09,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498792599] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:05:09,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:05:09,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 37 [2023-01-28 10:05:09,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318594232] [2023-01-28 10:05:09,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:05:09,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-01-28 10:05:09,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:05:09,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-01-28 10:05:09,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1347, Unknown=0, NotChecked=0, Total=1482 [2023-01-28 10:05:09,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 10:05:09,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 478 transitions, 7393 flow. Second operand has 39 states, 39 states have (on average 54.61538461538461) internal successors, (2130), 39 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) [2023-01-28 10:05:09,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:05:09,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 10:05:09,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:05:13,014 INFO L130 PetriNetUnfolder]: 1328/2430 cut-off events. [2023-01-28 10:05:13,014 INFO L131 PetriNetUnfolder]: For 43014/43014 co-relation queries the response was YES. [2023-01-28 10:05:13,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19039 conditions, 2430 events. 1328/2430 cut-off events. For 43014/43014 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14268 event pairs, 216 based on Foata normal form. 2/2432 useless extension candidates. Maximal degree in co-relation 18904. Up to 1958 conditions per place. [2023-01-28 10:05:13,033 INFO L137 encePairwiseOnDemand]: 194/206 looper letters, 366 selfloop transitions, 184 changer transitions 6/556 dead transitions. [2023-01-28 10:05:13,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 556 transitions, 9584 flow [2023-01-28 10:05:13,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-28 10:05:13,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-28 10:05:13,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1996 transitions. [2023-01-28 10:05:13,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2768377253814147 [2023-01-28 10:05:13,036 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1996 transitions. [2023-01-28 10:05:13,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1996 transitions. [2023-01-28 10:05:13,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:05:13,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1996 transitions. [2023-01-28 10:05:13,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 57.02857142857143) internal successors, (1996), 35 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:13,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 206.0) internal successors, (7416), 36 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:13,044 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 206.0) internal successors, (7416), 36 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:13,044 INFO L175 Difference]: Start difference. First operand has 339 places, 478 transitions, 7393 flow. Second operand 35 states and 1996 transitions. [2023-01-28 10:05:13,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 556 transitions, 9584 flow [2023-01-28 10:05:13,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 556 transitions, 8982 flow, removed 190 selfloop flow, removed 19 redundant places. [2023-01-28 10:05:13,176 INFO L231 Difference]: Finished difference. Result has 360 places, 501 transitions, 8067 flow [2023-01-28 10:05:13,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=6793, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=8067, PETRI_PLACES=360, PETRI_TRANSITIONS=501} [2023-01-28 10:05:13,176 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 339 predicate places. [2023-01-28 10:05:13,176 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 501 transitions, 8067 flow [2023-01-28 10:05:13,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 54.61538461538461) internal successors, (2130), 39 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) [2023-01-28 10:05:13,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:05:13,177 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:05:13,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-01-28 10:05:13,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:05:13,377 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:05:13,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:05:13,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1010617733, now seen corresponding path program 40 times [2023-01-28 10:05:13,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:05:13,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869873545] [2023-01-28 10:05:13,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:05:13,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:05:13,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:05:14,133 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:05:14,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:05:14,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869873545] [2023-01-28 10:05:14,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869873545] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:05:14,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174228501] [2023-01-28 10:05:14,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:05:14,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:05:14,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:05:14,134 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:05:14,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-01-28 10:05:14,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:05:14,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:05:14,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-01-28 10:05:14,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:05:14,575 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:05:14,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-01-28 10:05:14,644 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:05:14,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:05:15,127 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:05:15,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 104 [2023-01-28 10:05:15,452 INFO L321 Elim1Store]: treesize reduction 44, result has 52.7 percent of original size [2023-01-28 10:05:15,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 59 [2023-01-28 10:05:15,769 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:05:15,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174228501] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:05:15,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:05:15,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2023-01-28 10:05:15,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666585519] [2023-01-28 10:05:15,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:05:15,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-01-28 10:05:15,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:05:15,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-01-28 10:05:15,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1445, Unknown=0, NotChecked=0, Total=1640 [2023-01-28 10:05:15,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 10:05:15,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 501 transitions, 8067 flow. Second operand has 41 states, 41 states have (on average 61.41463414634146) internal successors, (2518), 41 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:15,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:05:15,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 10:05:15,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:05:17,291 INFO L130 PetriNetUnfolder]: 1481/2703 cut-off events. [2023-01-28 10:05:17,292 INFO L131 PetriNetUnfolder]: For 52388/52388 co-relation queries the response was YES. [2023-01-28 10:05:17,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22669 conditions, 2703 events. 1481/2703 cut-off events. For 52388/52388 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 16375 event pairs, 254 based on Foata normal form. 4/2707 useless extension candidates. Maximal degree in co-relation 22528. Up to 2220 conditions per place. [2023-01-28 10:05:17,317 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 402 selfloop transitions, 223 changer transitions 4/629 dead transitions. [2023-01-28 10:05:17,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 629 transitions, 11551 flow [2023-01-28 10:05:17,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-28 10:05:17,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-28 10:05:17,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2063 transitions. [2023-01-28 10:05:17,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3129550970873786 [2023-01-28 10:05:17,320 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2063 transitions. [2023-01-28 10:05:17,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2063 transitions. [2023-01-28 10:05:17,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:05:17,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2063 transitions. [2023-01-28 10:05:17,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 64.46875) internal successors, (2063), 32 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:17,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 206.0) internal successors, (6798), 33 states have internal predecessors, (6798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:17,325 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 206.0) internal successors, (6798), 33 states have internal predecessors, (6798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:17,325 INFO L175 Difference]: Start difference. First operand has 360 places, 501 transitions, 8067 flow. Second operand 32 states and 2063 transitions. [2023-01-28 10:05:17,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 629 transitions, 11551 flow [2023-01-28 10:05:17,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 629 transitions, 10632 flow, removed 323 selfloop flow, removed 27 redundant places. [2023-01-28 10:05:17,561 INFO L231 Difference]: Finished difference. Result has 365 places, 574 transitions, 9506 flow [2023-01-28 10:05:17,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=7182, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=9506, PETRI_PLACES=365, PETRI_TRANSITIONS=574} [2023-01-28 10:05:17,562 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 344 predicate places. [2023-01-28 10:05:17,562 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 574 transitions, 9506 flow [2023-01-28 10:05:17,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 61.41463414634146) internal successors, (2518), 41 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:17,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:05:17,562 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:05:17,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-01-28 10:05:17,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:05:17,763 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:05:17,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:05:17,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1638284751, now seen corresponding path program 41 times [2023-01-28 10:05:17,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:05:17,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528256772] [2023-01-28 10:05:17,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:05:17,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:05:17,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:05:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:05:18,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:05:18,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528256772] [2023-01-28 10:05:18,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528256772] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:05:18,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028472334] [2023-01-28 10:05:18,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:05:18,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:05:18,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:05:18,698 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:05:18,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-01-28 10:05:18,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 10:05:18,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:05:18,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-01-28 10:05:18,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:05:19,082 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:05:19,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:05:19,291 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:05:19,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-01-28 10:05:19,459 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:05:19,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028472334] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:05:19,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:05:19,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-01-28 10:05:19,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511131370] [2023-01-28 10:05:19,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:05:19,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-28 10:05:19,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:05:19,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-28 10:05:19,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2023-01-28 10:05:19,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 10:05:19,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 574 transitions, 9506 flow. Second operand has 35 states, 35 states have (on average 54.74285714285714) internal successors, (1916), 35 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:19,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:05:19,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 10:05:19,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:05:21,378 INFO L130 PetriNetUnfolder]: 1579/2895 cut-off events. [2023-01-28 10:05:21,378 INFO L131 PetriNetUnfolder]: For 64997/64997 co-relation queries the response was YES. [2023-01-28 10:05:21,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25125 conditions, 2895 events. 1579/2895 cut-off events. For 64997/64997 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 17933 event pairs, 289 based on Foata normal form. 2/2897 useless extension candidates. Maximal degree in co-relation 24985. Up to 2350 conditions per place. [2023-01-28 10:05:21,403 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 442 selfloop transitions, 212 changer transitions 2/656 dead transitions. [2023-01-28 10:05:21,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 656 transitions, 12492 flow [2023-01-28 10:05:21,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-28 10:05:21,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-28 10:05:21,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1843 transitions. [2023-01-28 10:05:21,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27958131067961167 [2023-01-28 10:05:21,405 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1843 transitions. [2023-01-28 10:05:21,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1843 transitions. [2023-01-28 10:05:21,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:05:21,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1843 transitions. [2023-01-28 10:05:21,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 57.59375) internal successors, (1843), 32 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:21,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 206.0) internal successors, (6798), 33 states have internal predecessors, (6798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:21,411 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 206.0) internal successors, (6798), 33 states have internal predecessors, (6798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:21,411 INFO L175 Difference]: Start difference. First operand has 365 places, 574 transitions, 9506 flow. Second operand 32 states and 1843 transitions. [2023-01-28 10:05:21,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 656 transitions, 12492 flow [2023-01-28 10:05:21,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 656 transitions, 12013 flow, removed 204 selfloop flow, removed 14 redundant places. [2023-01-28 10:05:21,612 INFO L231 Difference]: Finished difference. Result has 386 places, 594 transitions, 10656 flow [2023-01-28 10:05:21,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=9027, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=10656, PETRI_PLACES=386, PETRI_TRANSITIONS=594} [2023-01-28 10:05:21,613 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 365 predicate places. [2023-01-28 10:05:21,613 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 594 transitions, 10656 flow [2023-01-28 10:05:21,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 54.74285714285714) internal successors, (1916), 35 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:21,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:05:21,614 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:05:21,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-01-28 10:05:21,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-01-28 10:05:21,814 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:05:21,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:05:21,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1223489761, now seen corresponding path program 42 times [2023-01-28 10:05:21,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:05:21,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146607553] [2023-01-28 10:05:21,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:05:21,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:05:21,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:05:22,773 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:05:22,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:05:22,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146607553] [2023-01-28 10:05:22,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146607553] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:05:22,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235053418] [2023-01-28 10:05:22,774 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:05:22,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:05:22,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:05:22,775 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:05:22,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-01-28 10:05:22,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 10:05:22,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:05:22,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-01-28 10:05:22,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:05:23,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:05:23,261 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:05:23,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-01-28 10:05:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:05:23,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:05:23,807 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:05:23,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 103 [2023-01-28 10:05:24,221 INFO L321 Elim1Store]: treesize reduction 44, result has 52.7 percent of original size [2023-01-28 10:05:24,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 60 [2023-01-28 10:05:24,541 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:05:24,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235053418] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:05:24,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:05:24,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2023-01-28 10:05:24,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764155189] [2023-01-28 10:05:24,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:05:24,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-01-28 10:05:24,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:05:24,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-01-28 10:05:24,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1527, Unknown=0, NotChecked=0, Total=1722 [2023-01-28 10:05:24,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 10:05:24,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 594 transitions, 10656 flow. Second operand has 42 states, 42 states have (on average 54.38095238095238) internal successors, (2284), 42 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:24,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:05:24,544 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 10:05:24,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:05:26,943 INFO L130 PetriNetUnfolder]: 1879/3601 cut-off events. [2023-01-28 10:05:26,944 INFO L131 PetriNetUnfolder]: For 83662/83662 co-relation queries the response was YES. [2023-01-28 10:05:26,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30501 conditions, 3601 events. 1879/3601 cut-off events. For 83662/83662 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 24637 event pairs, 15 based on Foata normal form. 4/3605 useless extension candidates. Maximal degree in co-relation 30356. Up to 1671 conditions per place. [2023-01-28 10:05:26,974 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 421 selfloop transitions, 365 changer transitions 6/792 dead transitions. [2023-01-28 10:05:26,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 792 transitions, 15469 flow [2023-01-28 10:05:26,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-28 10:05:26,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-28 10:05:26,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1963 transitions. [2023-01-28 10:05:26,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2802684180468304 [2023-01-28 10:05:26,976 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1963 transitions. [2023-01-28 10:05:26,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1963 transitions. [2023-01-28 10:05:26,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:05:26,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1963 transitions. [2023-01-28 10:05:26,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 57.73529411764706) internal successors, (1963), 34 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:26,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 206.0) internal successors, (7210), 35 states have internal predecessors, (7210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:26,981 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 206.0) internal successors, (7210), 35 states have internal predecessors, (7210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:26,981 INFO L175 Difference]: Start difference. First operand has 386 places, 594 transitions, 10656 flow. Second operand 34 states and 1963 transitions. [2023-01-28 10:05:26,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 792 transitions, 15469 flow [2023-01-28 10:05:27,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 792 transitions, 13410 flow, removed 940 selfloop flow, removed 21 redundant places. [2023-01-28 10:05:27,227 INFO L231 Difference]: Finished difference. Result has 401 places, 722 transitions, 12249 flow [2023-01-28 10:05:27,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=9534, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=12249, PETRI_PLACES=401, PETRI_TRANSITIONS=722} [2023-01-28 10:05:27,228 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 380 predicate places. [2023-01-28 10:05:27,228 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 722 transitions, 12249 flow [2023-01-28 10:05:27,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 54.38095238095238) internal successors, (2284), 42 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:27,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:05:27,229 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:05:27,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-01-28 10:05:27,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-01-28 10:05:27,429 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:05:27,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:05:27,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1882185715, now seen corresponding path program 43 times [2023-01-28 10:05:27,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:05:27,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194931947] [2023-01-28 10:05:27,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:05:27,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:05:27,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:05:28,158 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:05:28,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:05:28,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194931947] [2023-01-28 10:05:28,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194931947] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:05:28,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349030794] [2023-01-28 10:05:28,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:05:28,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:05:28,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:05:28,163 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:05:28,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-01-28 10:05:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:05:28,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-01-28 10:05:28,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:05:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:05:28,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:05:28,770 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:05:28,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-01-28 10:05:28,910 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-01-28 10:05:28,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-01-28 10:05:28,971 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:05:28,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349030794] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:05:28,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:05:28,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 8] total 32 [2023-01-28 10:05:28,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674147058] [2023-01-28 10:05:28,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:05:28,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-28 10:05:28,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:05:28,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-28 10:05:28,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2023-01-28 10:05:28,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 10:05:28,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 722 transitions, 12249 flow. Second operand has 34 states, 34 states have (on average 61.64705882352941) internal successors, (2096), 34 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:28,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:05:28,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 10:05:28,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:05:31,323 INFO L130 PetriNetUnfolder]: 2233/4306 cut-off events. [2023-01-28 10:05:31,323 INFO L131 PetriNetUnfolder]: For 127505/127505 co-relation queries the response was YES. [2023-01-28 10:05:31,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39066 conditions, 4306 events. 2233/4306 cut-off events. For 127505/127505 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 30575 event pairs, 383 based on Foata normal form. 7/4313 useless extension candidates. Maximal degree in co-relation 38917. Up to 3482 conditions per place. [2023-01-28 10:05:31,363 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 700 selfloop transitions, 217 changer transitions 11/928 dead transitions. [2023-01-28 10:05:31,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 928 transitions, 19470 flow [2023-01-28 10:05:31,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-28 10:05:31,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-28 10:05:31,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2291 transitions. [2023-01-28 10:05:31,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.317753120665742 [2023-01-28 10:05:31,365 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2291 transitions. [2023-01-28 10:05:31,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2291 transitions. [2023-01-28 10:05:31,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:05:31,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2291 transitions. [2023-01-28 10:05:31,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 65.45714285714286) internal successors, (2291), 35 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:31,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 206.0) internal successors, (7416), 36 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:31,372 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 206.0) internal successors, (7416), 36 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:31,372 INFO L175 Difference]: Start difference. First operand has 401 places, 722 transitions, 12249 flow. Second operand 35 states and 2291 transitions. [2023-01-28 10:05:31,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 928 transitions, 19470 flow [2023-01-28 10:05:31,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 928 transitions, 18660 flow, removed 368 selfloop flow, removed 17 redundant places. [2023-01-28 10:05:31,960 INFO L231 Difference]: Finished difference. Result has 427 places, 817 transitions, 16330 flow [2023-01-28 10:05:31,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=11881, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=16330, PETRI_PLACES=427, PETRI_TRANSITIONS=817} [2023-01-28 10:05:31,961 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 406 predicate places. [2023-01-28 10:05:31,961 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 817 transitions, 16330 flow [2023-01-28 10:05:31,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 61.64705882352941) internal successors, (2096), 34 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:31,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:05:31,963 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:05:31,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-01-28 10:05:32,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-01-28 10:05:32,169 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:05:32,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:05:32,169 INFO L85 PathProgramCache]: Analyzing trace with hash 379627409, now seen corresponding path program 44 times [2023-01-28 10:05:32,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:05:32,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975048368] [2023-01-28 10:05:32,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:05:32,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:05:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:05:33,019 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:05:33,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:05:33,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975048368] [2023-01-28 10:05:33,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975048368] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:05:33,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855533678] [2023-01-28 10:05:33,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:05:33,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:05:33,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:05:33,020 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:05:33,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-01-28 10:05:33,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:05:33,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:05:33,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 107 conjunts are in the unsatisfiable core [2023-01-28 10:05:33,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:05:33,450 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:05:33,452 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:05:33,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 9 [2023-01-28 10:05:33,472 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:05:33,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:05:33,908 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-01-28 10:05:33,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 95 [2023-01-28 10:05:34,138 INFO L321 Elim1Store]: treesize reduction 90, result has 12.6 percent of original size [2023-01-28 10:05:34,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 24 [2023-01-28 10:05:35,151 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:05:35,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855533678] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:05:35,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:05:35,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 39 [2023-01-28 10:05:35,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55075374] [2023-01-28 10:05:35,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:05:35,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-01-28 10:05:35,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:05:35,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-01-28 10:05:35,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1443, Unknown=1, NotChecked=0, Total=1640 [2023-01-28 10:05:35,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 10:05:35,154 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 817 transitions, 16330 flow. Second operand has 41 states, 41 states have (on average 54.41463414634146) internal successors, (2231), 41 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:35,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:05:35,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 10:05:35,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:05:55,073 INFO L130 PetriNetUnfolder]: 3219/5857 cut-off events. [2023-01-28 10:05:55,074 INFO L131 PetriNetUnfolder]: For 251151/251151 co-relation queries the response was YES. [2023-01-28 10:05:55,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64250 conditions, 5857 events. 3219/5857 cut-off events. For 251151/251151 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 41789 event pairs, 20 based on Foata normal form. 6/5863 useless extension candidates. Maximal degree in co-relation 64091. Up to 1805 conditions per place. [2023-01-28 10:05:55,135 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 597 selfloop transitions, 666 changer transitions 19/1282 dead transitions. [2023-01-28 10:05:55,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 1282 transitions, 32630 flow [2023-01-28 10:05:55,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-01-28 10:05:55,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-01-28 10:05:55,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3467 transitions. [2023-01-28 10:05:55,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28050161812297736 [2023-01-28 10:05:55,138 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3467 transitions. [2023-01-28 10:05:55,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3467 transitions. [2023-01-28 10:05:55,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:05:55,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3467 transitions. [2023-01-28 10:05:55,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 57.78333333333333) internal successors, (3467), 60 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:55,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 206.0) internal successors, (12566), 61 states have internal predecessors, (12566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:55,150 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 206.0) internal successors, (12566), 61 states have internal predecessors, (12566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:55,150 INFO L175 Difference]: Start difference. First operand has 427 places, 817 transitions, 16330 flow. Second operand 60 states and 3467 transitions. [2023-01-28 10:05:55,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 1282 transitions, 32630 flow [2023-01-28 10:05:56,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 1282 transitions, 28404 flow, removed 2055 selfloop flow, removed 19 redundant places. [2023-01-28 10:05:56,114 INFO L231 Difference]: Finished difference. Result has 487 places, 1147 transitions, 27152 flow [2023-01-28 10:05:56,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=14088, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=386, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=27152, PETRI_PLACES=487, PETRI_TRANSITIONS=1147} [2023-01-28 10:05:56,115 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 466 predicate places. [2023-01-28 10:05:56,115 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 1147 transitions, 27152 flow [2023-01-28 10:05:56,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 54.41463414634146) internal successors, (2231), 41 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:56,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:05:56,115 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:05:56,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-01-28 10:05:56,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:05:56,321 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:05:56,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:05:56,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1007294427, now seen corresponding path program 45 times [2023-01-28 10:05:56,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:05:56,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763748076] [2023-01-28 10:05:56,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:05:56,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:05:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:05:57,300 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:05:57,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:05:57,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763748076] [2023-01-28 10:05:57,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763748076] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:05:57,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234474257] [2023-01-28 10:05:57,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:05:57,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:05:57,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:05:57,302 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:05:57,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-01-28 10:05:57,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 10:05:57,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:05:57,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 112 conjunts are in the unsatisfiable core [2023-01-28 10:05:57,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:05:58,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:05:58,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:05:58,036 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:05:58,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 33 [2023-01-28 10:05:58,090 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:05:58,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:05:58,704 INFO L321 Elim1Store]: treesize reduction 42, result has 64.1 percent of original size [2023-01-28 10:05:58,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 86 [2023-01-28 10:05:58,846 INFO L321 Elim1Store]: treesize reduction 68, result has 41.9 percent of original size [2023-01-28 10:05:58,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 59 [2023-01-28 10:05:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:05:59,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234474257] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:05:59,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:05:59,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-01-28 10:05:59,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899287478] [2023-01-28 10:05:59,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:05:59,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-01-28 10:05:59,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:05:59,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-01-28 10:05:59,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1741, Unknown=0, NotChecked=0, Total=1980 [2023-01-28 10:05:59,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 10:05:59,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 1147 transitions, 27152 flow. Second operand has 45 states, 45 states have (on average 54.44444444444444) internal successors, (2450), 45 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:05:59,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:05:59,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 10:05:59,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:06:07,821 INFO L130 PetriNetUnfolder]: 3338/6153 cut-off events. [2023-01-28 10:06:07,821 INFO L131 PetriNetUnfolder]: For 246599/246599 co-relation queries the response was YES. [2023-01-28 10:06:07,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67061 conditions, 6153 events. 3338/6153 cut-off events. For 246599/246599 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 45167 event pairs, 154 based on Foata normal form. 3/6156 useless extension candidates. Maximal degree in co-relation 66881. Up to 3429 conditions per place. [2023-01-28 10:06:07,891 INFO L137 encePairwiseOnDemand]: 194/206 looper letters, 850 selfloop transitions, 532 changer transitions 42/1424 dead transitions. [2023-01-28 10:06:07,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 1424 transitions, 36072 flow [2023-01-28 10:06:07,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-01-28 10:06:07,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-01-28 10:06:07,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 3808 transitions. [2023-01-28 10:06:07,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2759020431821475 [2023-01-28 10:06:07,895 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 3808 transitions. [2023-01-28 10:06:07,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 3808 transitions. [2023-01-28 10:06:07,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:06:07,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 3808 transitions. [2023-01-28 10:06:07,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 56.83582089552239) internal successors, (3808), 67 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:06:07,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 206.0) internal successors, (14008), 68 states have internal predecessors, (14008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:06:07,905 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 206.0) internal successors, (14008), 68 states have internal predecessors, (14008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:06:07,905 INFO L175 Difference]: Start difference. First operand has 487 places, 1147 transitions, 27152 flow. Second operand 67 states and 3808 transitions. [2023-01-28 10:06:07,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 1424 transitions, 36072 flow [2023-01-28 10:06:09,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 1424 transitions, 28740 flow, removed 3601 selfloop flow, removed 18 redundant places. [2023-01-28 10:06:09,433 INFO L231 Difference]: Finished difference. Result has 547 places, 1269 transitions, 26162 flow [2023-01-28 10:06:09,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=21300, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=423, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=26162, PETRI_PLACES=547, PETRI_TRANSITIONS=1269} [2023-01-28 10:06:09,434 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 526 predicate places. [2023-01-28 10:06:09,434 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 1269 transitions, 26162 flow [2023-01-28 10:06:09,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 54.44444444444444) internal successors, (2450), 45 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:06:09,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:06:09,435 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:06:09,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-01-28 10:06:09,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-01-28 10:06:09,637 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:06:09,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:06:09,637 INFO L85 PathProgramCache]: Analyzing trace with hash -186725331, now seen corresponding path program 46 times [2023-01-28 10:06:09,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:06:09,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677902198] [2023-01-28 10:06:09,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:06:09,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:06:09,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:06:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:06:10,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:06:10,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677902198] [2023-01-28 10:06:10,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677902198] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:06:10,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140469763] [2023-01-28 10:06:10,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:06:10,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:06:10,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:06:10,370 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:06:10,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-01-28 10:06:10,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:06:10,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:06:10,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-01-28 10:06:10,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:06:10,811 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:06:10,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-01-28 10:06:10,876 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:06:10,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:06:11,313 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:06:11,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 113 [2023-01-28 10:06:11,820 INFO L321 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-01-28 10:06:11,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 66 [2023-01-28 10:06:12,177 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:06:12,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140469763] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:06:12,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:06:12,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-01-28 10:06:12,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135752244] [2023-01-28 10:06:12,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:06:12,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-01-28 10:06:12,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:06:12,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-01-28 10:06:12,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1570, Unknown=0, NotChecked=0, Total=1806 [2023-01-28 10:06:12,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 10:06:12,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 1269 transitions, 26162 flow. Second operand has 43 states, 43 states have (on average 54.51162790697674) internal successors, (2344), 43 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) [2023-01-28 10:06:12,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:06:12,181 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 10:06:12,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:06:16,295 INFO L130 PetriNetUnfolder]: 3339/6135 cut-off events. [2023-01-28 10:06:16,295 INFO L131 PetriNetUnfolder]: For 179133/179133 co-relation queries the response was YES. [2023-01-28 10:06:16,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59792 conditions, 6135 events. 3339/6135 cut-off events. For 179133/179133 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 44792 event pairs, 449 based on Foata normal form. 2/6137 useless extension candidates. Maximal degree in co-relation 59602. Up to 5541 conditions per place. [2023-01-28 10:06:16,354 INFO L137 encePairwiseOnDemand]: 194/206 looper letters, 1060 selfloop transitions, 274 changer transitions 6/1340 dead transitions. [2023-01-28 10:06:16,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 1340 transitions, 29792 flow [2023-01-28 10:06:16,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-28 10:06:16,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-28 10:06:16,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1950 transitions. [2023-01-28 10:06:16,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27841233580810965 [2023-01-28 10:06:16,357 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1950 transitions. [2023-01-28 10:06:16,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1950 transitions. [2023-01-28 10:06:16,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:06:16,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1950 transitions. [2023-01-28 10:06:16,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 57.35294117647059) internal successors, (1950), 34 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:06:16,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 206.0) internal successors, (7210), 35 states have internal predecessors, (7210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:06:16,364 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 206.0) internal successors, (7210), 35 states have internal predecessors, (7210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:06:16,364 INFO L175 Difference]: Start difference. First operand has 547 places, 1269 transitions, 26162 flow. Second operand 34 states and 1950 transitions. [2023-01-28 10:06:16,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 1340 transitions, 29792 flow [2023-01-28 10:06:17,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 1340 transitions, 28029 flow, removed 727 selfloop flow, removed 45 redundant places. [2023-01-28 10:06:17,810 INFO L231 Difference]: Finished difference. Result has 538 places, 1285 transitions, 25673 flow [2023-01-28 10:06:17,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=24465, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=997, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=25673, PETRI_PLACES=538, PETRI_TRANSITIONS=1285} [2023-01-28 10:06:17,811 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 517 predicate places. [2023-01-28 10:06:17,812 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 1285 transitions, 25673 flow [2023-01-28 10:06:17,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 54.51162790697674) internal successors, (2344), 43 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) [2023-01-28 10:06:17,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:06:17,812 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:06:17,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-01-28 10:06:18,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:06:18,012 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:06:18,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:06:18,013 INFO L85 PathProgramCache]: Analyzing trace with hash -399050777, now seen corresponding path program 47 times [2023-01-28 10:06:18,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:06:18,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216006324] [2023-01-28 10:06:18,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:06:18,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:06:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:06:18,764 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:06:18,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:06:18,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216006324] [2023-01-28 10:06:18,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216006324] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:06:18,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388952802] [2023-01-28 10:06:18,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:06:18,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:06:18,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:06:18,767 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:06:18,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-01-28 10:06:18,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 10:06:18,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:06:18,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-01-28 10:06:18,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:06:19,131 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:06:19,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:06:19,291 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:06:19,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-01-28 10:06:19,508 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-01-28 10:06:19,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-01-28 10:06:19,571 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:06:19,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388952802] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:06:19,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:06:19,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 8] total 32 [2023-01-28 10:06:19,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493457755] [2023-01-28 10:06:19,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:06:19,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-28 10:06:19,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:06:19,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-28 10:06:19,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2023-01-28 10:06:19,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 10:06:19,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 1285 transitions, 25673 flow. Second operand has 34 states, 34 states have (on average 61.64705882352941) internal successors, (2096), 34 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:06:19,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:06:19,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 10:06:19,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:06:23,000 INFO L130 PetriNetUnfolder]: 3478/6414 cut-off events. [2023-01-28 10:06:23,000 INFO L131 PetriNetUnfolder]: For 207016/207016 co-relation queries the response was YES. [2023-01-28 10:06:23,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63777 conditions, 6414 events. 3478/6414 cut-off events. For 207016/207016 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 47246 event pairs, 492 based on Foata normal form. 6/6420 useless extension candidates. Maximal degree in co-relation 63586. Up to 5814 conditions per place. [2023-01-28 10:06:23,068 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 1209 selfloop transitions, 190 changer transitions 3/1402 dead transitions. [2023-01-28 10:06:23,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 1402 transitions, 31904 flow [2023-01-28 10:06:23,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-28 10:06:23,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-28 10:06:23,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1561 transitions. [2023-01-28 10:06:23,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3157362459546926 [2023-01-28 10:06:23,071 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1561 transitions. [2023-01-28 10:06:23,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1561 transitions. [2023-01-28 10:06:23,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:06:23,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1561 transitions. [2023-01-28 10:06:23,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 65.04166666666667) internal successors, (1561), 24 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:06:23,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 206.0) internal successors, (5150), 25 states have internal predecessors, (5150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:06:23,076 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 206.0) internal successors, (5150), 25 states have internal predecessors, (5150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:06:23,076 INFO L175 Difference]: Start difference. First operand has 538 places, 1285 transitions, 25673 flow. Second operand 24 states and 1561 transitions. [2023-01-28 10:06:23,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 1402 transitions, 31904 flow [2023-01-28 10:06:24,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 1402 transitions, 31461 flow, removed 71 selfloop flow, removed 26 redundant places. [2023-01-28 10:06:24,560 INFO L231 Difference]: Finished difference. Result has 542 places, 1327 transitions, 28186 flow [2023-01-28 10:06:24,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=25230, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=28186, PETRI_PLACES=542, PETRI_TRANSITIONS=1327} [2023-01-28 10:06:24,561 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 521 predicate places. [2023-01-28 10:06:24,561 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 1327 transitions, 28186 flow [2023-01-28 10:06:24,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 61.64705882352941) internal successors, (2096), 34 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:06:24,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:06:24,562 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:06:24,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-01-28 10:06:24,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-01-28 10:06:24,767 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:06:24,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:06:24,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1441966515, now seen corresponding path program 48 times [2023-01-28 10:06:24,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:06:24,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333564551] [2023-01-28 10:06:24,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:06:24,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:06:24,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:06:25,606 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:06:25,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:06:25,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333564551] [2023-01-28 10:06:25,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333564551] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:06:25,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000318571] [2023-01-28 10:06:25,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:06:25,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:06:25,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:06:25,607 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:06:25,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-01-28 10:06:25,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 10:06:25,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:06:25,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 122 conjunts are in the unsatisfiable core [2023-01-28 10:06:25,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:06:25,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 10:06:25,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 10:06:25,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 10:06:26,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:06:26,139 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:06:26,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-01-28 10:06:26,199 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:06:26,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:06:27,715 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset 4)) (.cse3 (+ c_~A~0.offset 8))) (and (forall ((v_ArrVal_1782 (Array Int Int)) (v_subst_20 Int)) (or (< (+ 2 v_subst_20) c_~N~0) (<= c_~N~0 (+ v_subst_20 1)) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1782) c_~A~0.base))) (< (let ((.cse1 (* v_subst_20 4))) (+ (select .cse0 (+ c_~A~0.offset .cse1 4)) (select .cse0 (+ c_~A~0.offset .cse1)))) (+ c_~counter~0 (select .cse0 .cse2) (select .cse0 .cse3) 1))))) (forall ((v_subst_19 Int) (v_ArrVal_1782 (Array Int Int))) (or (< (+ 2 v_subst_19) c_~N~0) (<= c_~N~0 (+ v_subst_19 1)) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1782) c_~A~0.base))) (<= (+ c_~counter~0 (select .cse4 .cse2) (select .cse4 .cse3)) (let ((.cse5 (* v_subst_19 4))) (+ (select .cse4 (+ c_~A~0.offset 4 .cse5)) (select .cse4 (+ c_~A~0.offset .cse5)))))))))) is different from false [2023-01-28 10:06:27,848 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:06:27,848 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 109 treesize of output 74 [2023-01-28 10:06:27,865 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:06:27,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 318 treesize of output 292 [2023-01-28 10:06:27,889 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:06:27,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 52 treesize of output 64 [2023-01-28 10:06:27,909 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:06:27,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 63 [2023-01-28 10:06:28,133 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:06:28,134 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 110 treesize of output 75 [2023-01-28 10:06:28,152 INFO L321 Elim1Store]: treesize reduction 24, result has 27.3 percent of original size [2023-01-28 10:06:28,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 158 treesize of output 137 [2023-01-28 10:06:28,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:06:28,159 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:06:28,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:06:28,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 49 [2023-01-28 10:06:28,175 INFO L321 Elim1Store]: treesize reduction 24, result has 27.3 percent of original size [2023-01-28 10:06:28,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 66 [2023-01-28 10:06:28,320 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:06:28,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000318571] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:06:28,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:06:28,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2023-01-28 10:06:28,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281980419] [2023-01-28 10:06:28,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:06:28,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-01-28 10:06:28,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:06:28,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-01-28 10:06:28,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1603, Unknown=1, NotChecked=82, Total=1892 [2023-01-28 10:06:28,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 10:06:28,323 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 1327 transitions, 28186 flow. Second operand has 44 states, 44 states have (on average 54.31818181818182) internal successors, (2390), 44 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:06:28,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:06:28,324 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 10:06:28,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:06:35,309 INFO L130 PetriNetUnfolder]: 3741/6911 cut-off events. [2023-01-28 10:06:35,310 INFO L131 PetriNetUnfolder]: For 232221/232221 co-relation queries the response was YES. [2023-01-28 10:06:35,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70475 conditions, 6911 events. 3741/6911 cut-off events. For 232221/232221 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 52069 event pairs, 191 based on Foata normal form. 6/6917 useless extension candidates. Maximal degree in co-relation 70203. Up to 4844 conditions per place. [2023-01-28 10:06:35,387 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 1150 selfloop transitions, 393 changer transitions 21/1564 dead transitions. [2023-01-28 10:06:35,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 1564 transitions, 35990 flow [2023-01-28 10:06:35,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-01-28 10:06:35,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-01-28 10:06:35,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2805 transitions. [2023-01-28 10:06:35,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27788785417079453 [2023-01-28 10:06:35,390 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2805 transitions. [2023-01-28 10:06:35,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2805 transitions. [2023-01-28 10:06:35,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:06:35,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2805 transitions. [2023-01-28 10:06:35,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 57.244897959183675) internal successors, (2805), 49 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:06:35,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 206.0) internal successors, (10300), 50 states have internal predecessors, (10300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:06:35,399 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 206.0) internal successors, (10300), 50 states have internal predecessors, (10300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:06:35,399 INFO L175 Difference]: Start difference. First operand has 542 places, 1327 transitions, 28186 flow. Second operand 49 states and 2805 transitions. [2023-01-28 10:06:35,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 1564 transitions, 35990 flow [2023-01-28 10:06:37,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 577 places, 1564 transitions, 34590 flow, removed 651 selfloop flow, removed 13 redundant places. [2023-01-28 10:06:37,062 INFO L231 Difference]: Finished difference. Result has 585 places, 1431 transitions, 31139 flow [2023-01-28 10:06:37,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=26811, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1001, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=31139, PETRI_PLACES=585, PETRI_TRANSITIONS=1431} [2023-01-28 10:06:37,063 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 564 predicate places. [2023-01-28 10:06:37,063 INFO L495 AbstractCegarLoop]: Abstraction has has 585 places, 1431 transitions, 31139 flow [2023-01-28 10:06:37,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 54.31818181818182) internal successors, (2390), 44 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:06:37,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:06:37,063 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:06:37,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-01-28 10:06:37,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-01-28 10:06:37,264 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:06:37,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:06:37,264 INFO L85 PathProgramCache]: Analyzing trace with hash -970493305, now seen corresponding path program 49 times [2023-01-28 10:06:37,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:06:37,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147090195] [2023-01-28 10:06:37,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:06:37,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:06:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:06:38,154 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:06:38,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:06:38,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147090195] [2023-01-28 10:06:38,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147090195] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:06:38,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266927151] [2023-01-28 10:06:38,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:06:38,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:06:38,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:06:38,156 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:06:38,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-01-28 10:06:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:06:38,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-01-28 10:06:38,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:06:38,567 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:06:38,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:06:38,754 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:06:38,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-01-28 10:06:38,906 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-01-28 10:06:38,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-01-28 10:06:38,973 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:06:38,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266927151] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:06:38,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:06:38,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-01-28 10:06:38,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703411576] [2023-01-28 10:06:38,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:06:38,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-28 10:06:38,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:06:38,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-28 10:06:38,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2023-01-28 10:06:38,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 10:06:38,976 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 585 places, 1431 transitions, 31139 flow. Second operand has 35 states, 35 states have (on average 54.6) internal successors, (1911), 35 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:06:38,976 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:06:38,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 10:06:38,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:06:43,955 INFO L130 PetriNetUnfolder]: 3917/7265 cut-off events. [2023-01-28 10:06:43,956 INFO L131 PetriNetUnfolder]: For 268519/268519 co-relation queries the response was YES. [2023-01-28 10:06:44,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76501 conditions, 7265 events. 3917/7265 cut-off events. For 268519/268519 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 54792 event pairs, 570 based on Foata normal form. 4/7269 useless extension candidates. Maximal degree in co-relation 75946. Up to 6433 conditions per place. [2023-01-28 10:06:44,039 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 1252 selfloop transitions, 312 changer transitions 2/1566 dead transitions. [2023-01-28 10:06:44,039 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 616 places, 1566 transitions, 38372 flow [2023-01-28 10:06:44,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-28 10:06:44,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-28 10:06:44,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1844 transitions. [2023-01-28 10:06:44,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2797330097087379 [2023-01-28 10:06:44,041 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1844 transitions. [2023-01-28 10:06:44,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1844 transitions. [2023-01-28 10:06:44,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:06:44,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1844 transitions. [2023-01-28 10:06:44,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 57.625) internal successors, (1844), 32 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:06:44,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 206.0) internal successors, (6798), 33 states have internal predecessors, (6798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:06:44,046 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 206.0) internal successors, (6798), 33 states have internal predecessors, (6798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:06:44,046 INFO L175 Difference]: Start difference. First operand has 585 places, 1431 transitions, 31139 flow. Second operand 32 states and 1844 transitions. [2023-01-28 10:06:44,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 616 places, 1566 transitions, 38372 flow [2023-01-28 10:06:46,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 1566 transitions, 37711 flow, removed 277 selfloop flow, removed 23 redundant places. [2023-01-28 10:06:46,029 INFO L231 Difference]: Finished difference. Result has 601 places, 1493 transitions, 34392 flow [2023-01-28 10:06:46,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=30478, PETRI_DIFFERENCE_MINUEND_PLACES=562, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=34392, PETRI_PLACES=601, PETRI_TRANSITIONS=1493} [2023-01-28 10:06:46,031 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 580 predicate places. [2023-01-28 10:06:46,031 INFO L495 AbstractCegarLoop]: Abstraction has has 601 places, 1493 transitions, 34392 flow [2023-01-28 10:06:46,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 54.6) internal successors, (1911), 35 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:06:46,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:06:46,031 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:06:46,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-01-28 10:06:46,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:06:46,236 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:06:46,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:06:46,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1952573787, now seen corresponding path program 50 times [2023-01-28 10:06:46,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:06:46,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850076855] [2023-01-28 10:06:46,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:06:46,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:06:46,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:06:47,021 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:06:47,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:06:47,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850076855] [2023-01-28 10:06:47,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850076855] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:06:47,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398103026] [2023-01-28 10:06:47,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:06:47,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:06:47,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:06:47,022 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:06:47,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-01-28 10:06:47,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:06:47,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:06:47,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-01-28 10:06:47,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:06:47,565 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:06:47,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-01-28 10:06:47,613 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:06:47,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:06:48,078 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:06:48,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 114 [2023-01-28 10:06:48,596 INFO L321 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-01-28 10:06:48,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 65 [2023-01-28 10:06:48,988 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:06:48,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398103026] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:06:48,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:06:48,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-01-28 10:06:48,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804191733] [2023-01-28 10:06:48,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:06:48,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-01-28 10:06:48,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:06:48,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-01-28 10:06:48,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1586, Unknown=0, NotChecked=0, Total=1806 [2023-01-28 10:06:48,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 10:06:48,992 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 601 places, 1493 transitions, 34392 flow. Second operand has 43 states, 43 states have (on average 54.51162790697674) internal successors, (2344), 43 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) [2023-01-28 10:06:48,992 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:06:48,992 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 10:06:48,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:06:54,556 INFO L130 PetriNetUnfolder]: 3959/7348 cut-off events. [2023-01-28 10:06:54,557 INFO L131 PetriNetUnfolder]: For 276502/276502 co-relation queries the response was YES. [2023-01-28 10:06:54,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78197 conditions, 7348 events. 3959/7348 cut-off events. For 276502/276502 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 55516 event pairs, 620 based on Foata normal form. 3/7351 useless extension candidates. Maximal degree in co-relation 77980. Up to 7025 conditions per place. [2023-01-28 10:06:54,654 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 1402 selfloop transitions, 154 changer transitions 3/1559 dead transitions. [2023-01-28 10:06:54,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 634 places, 1559 transitions, 38657 flow [2023-01-28 10:06:54,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-28 10:06:54,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-28 10:06:54,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1942 transitions. [2023-01-28 10:06:54,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2772701313535123 [2023-01-28 10:06:54,657 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1942 transitions. [2023-01-28 10:06:54,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1942 transitions. [2023-01-28 10:06:54,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:06:54,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1942 transitions. [2023-01-28 10:06:54,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 57.11764705882353) internal successors, (1942), 34 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:06:54,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 206.0) internal successors, (7210), 35 states have internal predecessors, (7210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:06:54,664 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 206.0) internal successors, (7210), 35 states have internal predecessors, (7210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:06:54,664 INFO L175 Difference]: Start difference. First operand has 601 places, 1493 transitions, 34392 flow. Second operand 34 states and 1942 transitions. [2023-01-28 10:06:54,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 634 places, 1559 transitions, 38657 flow [2023-01-28 10:06:56,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 616 places, 1559 transitions, 36409 flow, removed 1048 selfloop flow, removed 18 redundant places. [2023-01-28 10:06:56,923 INFO L231 Difference]: Finished difference. Result has 619 places, 1506 transitions, 33323 flow [2023-01-28 10:06:56,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=32626, PETRI_DIFFERENCE_MINUEND_PLACES=583, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=33323, PETRI_PLACES=619, PETRI_TRANSITIONS=1506} [2023-01-28 10:06:56,925 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 598 predicate places. [2023-01-28 10:06:56,925 INFO L495 AbstractCegarLoop]: Abstraction has has 619 places, 1506 transitions, 33323 flow [2023-01-28 10:06:56,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 54.51162790697674) internal successors, (2344), 43 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) [2023-01-28 10:06:56,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:06:56,925 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:06:56,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-01-28 10:06:57,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-01-28 10:06:57,126 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:06:57,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:06:57,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1356416081, now seen corresponding path program 51 times [2023-01-28 10:06:57,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:06:57,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777280441] [2023-01-28 10:06:57,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:06:57,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:06:57,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:06:58,002 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:06:58,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:06:58,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777280441] [2023-01-28 10:06:58,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777280441] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:06:58,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70014894] [2023-01-28 10:06:58,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:06:58,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:06:58,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:06:58,004 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:06:58,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-01-28 10:06:58,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 10:06:58,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:06:58,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 121 conjunts are in the unsatisfiable core [2023-01-28 10:06:58,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:06:58,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-01-28 10:06:58,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 10:06:58,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 10:06:58,634 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:06:58,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2023-01-28 10:06:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:06:58,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:06:59,952 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:06:59,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70014894] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:06:59,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:06:59,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 11] total 39 [2023-01-28 10:06:59,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632675355] [2023-01-28 10:06:59,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:06:59,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-01-28 10:06:59,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:06:59,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-01-28 10:06:59,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2023-01-28 10:06:59,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 10:06:59,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 619 places, 1506 transitions, 33323 flow. Second operand has 41 states, 41 states have (on average 54.46341463414634) internal successors, (2233), 41 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:06:59,956 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:06:59,956 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 10:06:59,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:07:09,176 INFO L130 PetriNetUnfolder]: 4110/7661 cut-off events. [2023-01-28 10:07:09,176 INFO L131 PetriNetUnfolder]: For 290183/290183 co-relation queries the response was YES. [2023-01-28 10:07:09,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81401 conditions, 7661 events. 4110/7661 cut-off events. For 290183/290183 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 58709 event pairs, 588 based on Foata normal form. 4/7665 useless extension candidates. Maximal degree in co-relation 81180. Up to 6861 conditions per place. [2023-01-28 10:07:09,278 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 1331 selfloop transitions, 314 changer transitions 8/1653 dead transitions. [2023-01-28 10:07:09,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 658 places, 1653 transitions, 40722 flow [2023-01-28 10:07:09,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-01-28 10:07:09,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-01-28 10:07:09,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2290 transitions. [2023-01-28 10:07:09,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2779126213592233 [2023-01-28 10:07:09,280 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2290 transitions. [2023-01-28 10:07:09,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2290 transitions. [2023-01-28 10:07:09,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:07:09,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2290 transitions. [2023-01-28 10:07:09,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 57.25) internal successors, (2290), 40 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:07:09,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 206.0) internal successors, (8446), 41 states have internal predecessors, (8446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:07:09,285 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 206.0) internal successors, (8446), 41 states have internal predecessors, (8446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:07:09,285 INFO L175 Difference]: Start difference. First operand has 619 places, 1506 transitions, 33323 flow. Second operand 40 states and 2290 transitions. [2023-01-28 10:07:09,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 658 places, 1653 transitions, 40722 flow [2023-01-28 10:07:11,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 634 places, 1653 transitions, 40533 flow, removed 21 selfloop flow, removed 24 redundant places. [2023-01-28 10:07:11,875 INFO L231 Difference]: Finished difference. Result has 646 places, 1574 transitions, 37265 flow [2023-01-28 10:07:11,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=33134, PETRI_DIFFERENCE_MINUEND_PLACES=595, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=37265, PETRI_PLACES=646, PETRI_TRANSITIONS=1574} [2023-01-28 10:07:11,876 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 625 predicate places. [2023-01-28 10:07:11,876 INFO L495 AbstractCegarLoop]: Abstraction has has 646 places, 1574 transitions, 37265 flow [2023-01-28 10:07:11,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 54.46341463414634) internal successors, (2233), 41 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:07:11,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:07:11,877 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:07:11,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-01-28 10:07:12,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-01-28 10:07:12,078 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:07:12,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:07:12,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1894271659, now seen corresponding path program 52 times [2023-01-28 10:07:12,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:07:12,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891124828] [2023-01-28 10:07:12,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:07:12,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:07:12,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:07:13,058 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:07:13,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:07:13,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891124828] [2023-01-28 10:07:13,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891124828] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:07:13,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977409137] [2023-01-28 10:07:13,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:07:13,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:07:13,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:07:13,060 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:07:13,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-01-28 10:07:13,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:07:13,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:07:13,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-01-28 10:07:13,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:07:13,598 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:07:13,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-01-28 10:07:13,657 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:07:13,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:07:14,130 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:07:14,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 113 [2023-01-28 10:07:14,539 INFO L321 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-01-28 10:07:14,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 66 [2023-01-28 10:07:14,926 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:07:14,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977409137] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:07:14,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:07:14,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2023-01-28 10:07:14,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728776999] [2023-01-28 10:07:14,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:07:14,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-01-28 10:07:14,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:07:14,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-01-28 10:07:14,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1529, Unknown=0, NotChecked=0, Total=1722 [2023-01-28 10:07:14,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 10:07:14,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 646 places, 1574 transitions, 37265 flow. Second operand has 42 states, 42 states have (on average 54.38095238095238) internal successors, (2284), 42 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:07:14,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:07:14,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 10:07:14,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:07:20,459 INFO L130 PetriNetUnfolder]: 4212/7877 cut-off events. [2023-01-28 10:07:20,460 INFO L131 PetriNetUnfolder]: For 385078/385078 co-relation queries the response was YES. [2023-01-28 10:07:20,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90144 conditions, 7877 events. 4212/7877 cut-off events. For 385078/385078 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 61321 event pairs, 587 based on Foata normal form. 8/7885 useless extension candidates. Maximal degree in co-relation 89910. Up to 7280 conditions per place. [2023-01-28 10:07:20,731 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 1432 selfloop transitions, 246 changer transitions 6/1684 dead transitions. [2023-01-28 10:07:20,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 675 places, 1684 transitions, 43221 flow [2023-01-28 10:07:20,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-28 10:07:20,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-28 10:07:20,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1726 transitions. [2023-01-28 10:07:20,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27928802588996765 [2023-01-28 10:07:20,733 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1726 transitions. [2023-01-28 10:07:20,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1726 transitions. [2023-01-28 10:07:20,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:07:20,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1726 transitions. [2023-01-28 10:07:20,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 57.53333333333333) internal successors, (1726), 30 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:07:20,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 206.0) internal successors, (6386), 31 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:07:20,737 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 206.0) internal successors, (6386), 31 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:07:20,737 INFO L175 Difference]: Start difference. First operand has 646 places, 1574 transitions, 37265 flow. Second operand 30 states and 1726 transitions. [2023-01-28 10:07:20,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 675 places, 1684 transitions, 43221 flow [2023-01-28 10:07:23,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 650 places, 1684 transitions, 41064 flow, removed 958 selfloop flow, removed 25 redundant places. [2023-01-28 10:07:23,487 INFO L231 Difference]: Finished difference. Result has 654 places, 1622 transitions, 37692 flow [2023-01-28 10:07:23,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=35152, PETRI_DIFFERENCE_MINUEND_PLACES=621, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=37692, PETRI_PLACES=654, PETRI_TRANSITIONS=1622} [2023-01-28 10:07:23,489 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 633 predicate places. [2023-01-28 10:07:23,489 INFO L495 AbstractCegarLoop]: Abstraction has has 654 places, 1622 transitions, 37692 flow [2023-01-28 10:07:23,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 54.38095238095238) internal successors, (2284), 42 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:07:23,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:07:23,489 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:07:23,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-01-28 10:07:23,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:07:23,694 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:07:23,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:07:23,695 INFO L85 PathProgramCache]: Analyzing trace with hash 823650291, now seen corresponding path program 53 times [2023-01-28 10:07:23,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:07:23,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869871] [2023-01-28 10:07:23,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:07:23,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:07:23,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:07:24,447 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:07:24,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:07:24,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869871] [2023-01-28 10:07:24,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869871] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:07:24,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855030618] [2023-01-28 10:07:24,448 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:07:24,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:07:24,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:07:24,449 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:07:24,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-01-28 10:07:24,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 10:07:24,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:07:24,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-01-28 10:07:24,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:07:24,794 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:07:24,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:07:24,959 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:07:24,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-01-28 10:07:25,101 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-01-28 10:07:25,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-01-28 10:07:25,159 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:07:25,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855030618] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:07:25,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:07:25,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 31 [2023-01-28 10:07:25,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359880433] [2023-01-28 10:07:25,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:07:25,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 10:07:25,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:07:25,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 10:07:25,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2023-01-28 10:07:25,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 10:07:25,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 654 places, 1622 transitions, 37692 flow. Second operand has 33 states, 33 states have (on average 54.63636363636363) internal successors, (1803), 33 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:07:25,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:07:25,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 10:07:25,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:07:31,202 INFO L130 PetriNetUnfolder]: 4364/8216 cut-off events. [2023-01-28 10:07:31,203 INFO L131 PetriNetUnfolder]: For 425820/425820 co-relation queries the response was YES. [2023-01-28 10:07:31,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95495 conditions, 8216 events. 4364/8216 cut-off events. For 425820/425820 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 64669 event pairs, 625 based on Foata normal form. 6/8222 useless extension candidates. Maximal degree in co-relation 95259. Up to 7429 conditions per place. [2023-01-28 10:07:31,310 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 1522 selfloop transitions, 231 changer transitions 4/1757 dead transitions. [2023-01-28 10:07:31,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 686 places, 1757 transitions, 45808 flow [2023-01-28 10:07:31,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-28 10:07:31,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-01-28 10:07:31,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1914 transitions. [2023-01-28 10:07:31,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2815533980582524 [2023-01-28 10:07:31,312 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1914 transitions. [2023-01-28 10:07:31,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1914 transitions. [2023-01-28 10:07:31,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:07:31,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1914 transitions. [2023-01-28 10:07:31,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 58.0) internal successors, (1914), 33 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:07:31,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 206.0) internal successors, (7004), 34 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:07:31,316 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 206.0) internal successors, (7004), 34 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:07:31,316 INFO L175 Difference]: Start difference. First operand has 654 places, 1622 transitions, 37692 flow. Second operand 33 states and 1914 transitions. [2023-01-28 10:07:31,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 686 places, 1757 transitions, 45808 flow [2023-01-28 10:07:34,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 669 places, 1757 transitions, 45274 flow, removed 222 selfloop flow, removed 17 redundant places. [2023-01-28 10:07:34,455 INFO L231 Difference]: Finished difference. Result has 673 places, 1665 transitions, 40638 flow [2023-01-28 10:07:34,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=37158, PETRI_DIFFERENCE_MINUEND_PLACES=637, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=40638, PETRI_PLACES=673, PETRI_TRANSITIONS=1665} [2023-01-28 10:07:34,456 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 652 predicate places. [2023-01-28 10:07:34,456 INFO L495 AbstractCegarLoop]: Abstraction has has 673 places, 1665 transitions, 40638 flow [2023-01-28 10:07:34,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 54.63636363636363) internal successors, (1803), 33 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:07:34,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:07:34,457 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:07:34,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-01-28 10:07:34,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:07:34,657 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:07:34,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:07:34,658 INFO L85 PathProgramCache]: Analyzing trace with hash -45333221, now seen corresponding path program 54 times [2023-01-28 10:07:34,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:07:34,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810447740] [2023-01-28 10:07:34,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:07:34,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:07:34,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:07:35,363 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:07:35,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:07:35,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810447740] [2023-01-28 10:07:35,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810447740] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:07:35,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018928912] [2023-01-28 10:07:35,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:07:35,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:07:35,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:07:35,365 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:07:35,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-01-28 10:07:35,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 10:07:35,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:07:35,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 110 conjunts are in the unsatisfiable core [2023-01-28 10:07:35,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:07:35,837 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:07:35,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2023-01-28 10:07:35,882 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:07:35,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:07:36,215 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:07:36,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-01-28 10:07:36,256 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-28 10:07:36,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2023-01-28 10:07:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:07:36,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018928912] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:07:36,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:07:36,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 10] total 35 [2023-01-28 10:07:36,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143329859] [2023-01-28 10:07:36,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:07:36,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-01-28 10:07:36,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:07:36,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-01-28 10:07:36,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2023-01-28 10:07:36,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 10:07:36,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 673 places, 1665 transitions, 40638 flow. Second operand has 37 states, 37 states have (on average 61.62162162162162) internal successors, (2280), 37 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:07:36,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:07:36,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 10:07:36,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:07:43,016 INFO L130 PetriNetUnfolder]: 4388/8270 cut-off events. [2023-01-28 10:07:43,016 INFO L131 PetriNetUnfolder]: For 420261/420261 co-relation queries the response was YES. [2023-01-28 10:07:43,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96160 conditions, 8270 events. 4388/8270 cut-off events. For 420261/420261 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 65528 event pairs, 622 based on Foata normal form. 2/8272 useless extension candidates. Maximal degree in co-relation 95919. Up to 7513 conditions per place. [2023-01-28 10:07:43,124 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 1473 selfloop transitions, 261 changer transitions 8/1742 dead transitions. [2023-01-28 10:07:43,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 704 places, 1742 transitions, 45346 flow [2023-01-28 10:07:43,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-28 10:07:43,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-01-28 10:07:43,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2117 transitions. [2023-01-28 10:07:43,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31141512209473377 [2023-01-28 10:07:43,131 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2117 transitions. [2023-01-28 10:07:43,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2117 transitions. [2023-01-28 10:07:43,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:07:43,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2117 transitions. [2023-01-28 10:07:43,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 64.15151515151516) internal successors, (2117), 33 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:07:43,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 206.0) internal successors, (7004), 34 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:07:43,136 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 206.0) internal successors, (7004), 34 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:07:43,136 INFO L175 Difference]: Start difference. First operand has 673 places, 1665 transitions, 40638 flow. Second operand 33 states and 2117 transitions. [2023-01-28 10:07:43,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 704 places, 1742 transitions, 45346 flow [2023-01-28 10:07:46,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 684 places, 1742 transitions, 43259 flow, removed 962 selfloop flow, removed 20 redundant places. [2023-01-28 10:07:46,670 INFO L231 Difference]: Finished difference. Result has 689 places, 1672 transitions, 39323 flow [2023-01-28 10:07:46,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=38542, PETRI_DIFFERENCE_MINUEND_PLACES=652, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=39323, PETRI_PLACES=689, PETRI_TRANSITIONS=1672} [2023-01-28 10:07:46,671 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 668 predicate places. [2023-01-28 10:07:46,672 INFO L495 AbstractCegarLoop]: Abstraction has has 689 places, 1672 transitions, 39323 flow [2023-01-28 10:07:46,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 61.62162162162162) internal successors, (2280), 37 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:07:46,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:07:46,672 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:07:46,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-01-28 10:07:46,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:07:46,873 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:07:46,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:07:46,873 INFO L85 PathProgramCache]: Analyzing trace with hash -934274975, now seen corresponding path program 55 times [2023-01-28 10:07:46,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:07:46,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928953012] [2023-01-28 10:07:46,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:07:46,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:07:46,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:07:47,694 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:07:47,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:07:47,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928953012] [2023-01-28 10:07:47,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928953012] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:07:47,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303788826] [2023-01-28 10:07:47,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:07:47,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:07:47,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:07:47,696 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:07:47,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-01-28 10:07:47,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:07:47,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 108 conjunts are in the unsatisfiable core [2023-01-28 10:07:47,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:07:48,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:07:48,037 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 25 treesize of output 23 [2023-01-28 10:07:48,161 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:07:48,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:07:48,162 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:07:48,165 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:07:48,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 23 [2023-01-28 10:07:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:07:48,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:07:48,317 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset 4)) (.cse2 (+ c_~A~0.offset 8))) (and (forall ((v_ArrVal_2053 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2053) c_~A~0.base))) (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse1) (select .cse0 .cse2))) (+ c_~counter~0 1))) (forall ((v_ArrVal_2053 (Array Int Int))) (<= c_~counter~0 (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2053) c_~A~0.base))) (+ (select .cse3 c_~A~0.offset) (select .cse3 .cse1) (select .cse3 .cse2))))))) is different from false [2023-01-28 10:07:48,324 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset 4)) (.cse3 (+ c_~A~0.offset 8)) (.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))))) (and (forall ((v_ArrVal_2053 (Array Int Int))) (<= (+ .cse0 c_~counter~0) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2053) c_~A~0.base))) (+ (select .cse1 c_~A~0.offset) (select .cse1 .cse2) (select .cse1 .cse3))))) (forall ((v_ArrVal_2053 (Array Int Int))) (< (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2053) c_~A~0.base))) (+ (select .cse4 c_~A~0.offset) (select .cse4 .cse2) (select .cse4 .cse3))) (+ .cse0 c_~counter~0 1))))) is different from false [2023-01-28 10:07:48,331 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (select |c_#memory_int| c_~A~0.base)) (.cse7 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse3 (+ c_~A~0.offset 4)) (.cse4 (+ c_~A~0.offset 8)) (.cse0 (select .cse6 (+ c_~A~0.offset .cse7))) (.cse1 (select .cse6 (+ c_~A~0.offset .cse7 4)))) (and (forall ((v_ArrVal_2053 (Array Int Int))) (<= (+ .cse0 c_~counter~0 .cse1) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2053) c_~A~0.base))) (+ (select .cse2 c_~A~0.offset) (select .cse2 .cse3) (select .cse2 .cse4))))) (forall ((v_ArrVal_2053 (Array Int Int))) (< (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2053) c_~A~0.base))) (+ (select .cse5 c_~A~0.offset) (select .cse5 .cse3) (select .cse5 .cse4))) (+ .cse0 c_~counter~0 .cse1 1)))))) is different from false [2023-01-28 10:07:48,365 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:07:48,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 118 [2023-01-28 10:07:48,371 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:07:48,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 14 [2023-01-28 10:07:48,534 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:07:48,630 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 5 not checked. [2023-01-28 10:07:48,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303788826] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:07:48,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:07:48,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 35 [2023-01-28 10:07:48,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832203808] [2023-01-28 10:07:48,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:07:48,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-01-28 10:07:48,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:07:48,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-01-28 10:07:48,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1007, Unknown=3, NotChecked=198, Total=1332 [2023-01-28 10:07:48,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 10:07:48,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 689 places, 1672 transitions, 39323 flow. Second operand has 37 states, 37 states have (on average 54.567567567567565) internal successors, (2019), 37 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:07:48,633 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:07:48,633 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 10:07:48,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:07:54,905 INFO L130 PetriNetUnfolder]: 4533/8543 cut-off events. [2023-01-28 10:07:54,905 INFO L131 PetriNetUnfolder]: For 439591/439591 co-relation queries the response was YES. [2023-01-28 10:07:54,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99420 conditions, 8543 events. 4533/8543 cut-off events. For 439591/439591 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 68156 event pairs, 571 based on Foata normal form. 5/8548 useless extension candidates. Maximal degree in co-relation 99173. Up to 7219 conditions per place. [2023-01-28 10:07:55,016 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 1365 selfloop transitions, 408 changer transitions 1/1774 dead transitions. [2023-01-28 10:07:55,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 710 places, 1774 transitions, 45010 flow [2023-01-28 10:07:55,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 10:07:55,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 10:07:55,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1270 transitions. [2023-01-28 10:07:55,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2802294792586055 [2023-01-28 10:07:55,018 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1270 transitions. [2023-01-28 10:07:55,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1270 transitions. [2023-01-28 10:07:55,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:07:55,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1270 transitions. [2023-01-28 10:07:55,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 57.72727272727273) internal successors, (1270), 22 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:07:55,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 206.0) internal successors, (4738), 23 states have internal predecessors, (4738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:07:55,021 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 206.0) internal successors, (4738), 23 states have internal predecessors, (4738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:07:55,021 INFO L175 Difference]: Start difference. First operand has 689 places, 1672 transitions, 39323 flow. Second operand 22 states and 1270 transitions. [2023-01-28 10:07:55,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 710 places, 1774 transitions, 45010 flow [2023-01-28 10:07:58,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 684 places, 1774 transitions, 44415 flow, removed 97 selfloop flow, removed 26 redundant places. [2023-01-28 10:07:58,502 INFO L231 Difference]: Finished difference. Result has 689 places, 1716 transitions, 41348 flow [2023-01-28 10:07:58,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=38728, PETRI_DIFFERENCE_MINUEND_PLACES=663, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=366, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=41348, PETRI_PLACES=689, PETRI_TRANSITIONS=1716} [2023-01-28 10:07:58,504 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 668 predicate places. [2023-01-28 10:07:58,504 INFO L495 AbstractCegarLoop]: Abstraction has has 689 places, 1716 transitions, 41348 flow [2023-01-28 10:07:58,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 54.567567567567565) internal successors, (2019), 37 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:07:58,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:07:58,504 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:07:58,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-01-28 10:07:58,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-01-28 10:07:58,709 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:07:58,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:07:58,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1135077057, now seen corresponding path program 56 times [2023-01-28 10:07:58,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:07:58,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987722133] [2023-01-28 10:07:58,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:07:58,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:07:58,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:07:59,461 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:07:59,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:07:59,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987722133] [2023-01-28 10:07:59,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987722133] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:07:59,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364744014] [2023-01-28 10:07:59,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:07:59,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:07:59,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:07:59,463 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:07:59,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-01-28 10:07:59,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:07:59,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:07:59,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 102 conjunts are in the unsatisfiable core [2023-01-28 10:07:59,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:07:59,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:07:59,740 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 [2023-01-28 10:07:59,890 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:07:59,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:08:00,070 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (.cse1 (+ c_~A~0.offset 4)) (.cse2 (+ c_~A~0.offset 8))) (and (forall ((v_ArrVal_2092 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2092) c_~A~0.base))) (< (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse1) (select .cse0 .cse2)) (+ c_~counter~0 (select .cse0 .cse3) 1)))) (forall ((v_ArrVal_2092 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2092) c_~A~0.base))) (<= (+ c_~counter~0 (select .cse4 .cse3)) (+ (select .cse4 c_~A~0.offset) (select .cse4 .cse1) (select .cse4 .cse2))))))) is different from false [2023-01-28 10:08:00,079 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse3 (+ c_~A~0.offset 4)) (.cse4 (+ c_~A~0.offset 8)) (.cse1 (+ c_~A~0.offset .cse6 4)) (.cse2 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse6)))) (and (forall ((v_ArrVal_2092 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2092) c_~A~0.base))) (<= (+ (select .cse0 .cse1) .cse2 c_~counter~0) (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse3) (select .cse0 .cse4))))) (forall ((v_ArrVal_2092 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2092) c_~A~0.base))) (< (+ (select .cse5 c_~A~0.offset) (select .cse5 .cse3) (select .cse5 .cse4)) (+ (select .cse5 .cse1) .cse2 c_~counter~0 1))))))) is different from false [2023-01-28 10:08:00,116 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:08:00,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 125 [2023-01-28 10:08:00,131 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:08:00,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 43 [2023-01-28 10:08:00,375 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:08:00,476 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 3 not checked. [2023-01-28 10:08:00,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364744014] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:08:00,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:08:00,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 34 [2023-01-28 10:08:00,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316860154] [2023-01-28 10:08:00,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:08:00,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-01-28 10:08:00,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:08:00,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-01-28 10:08:00,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1004, Unknown=2, NotChecked=130, Total=1260 [2023-01-28 10:08:00,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 10:08:00,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 689 places, 1716 transitions, 41348 flow. Second operand has 36 states, 36 states have (on average 54.5) internal successors, (1962), 36 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:08:00,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:08:00,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 10:08:00,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:08:07,871 INFO L130 PetriNetUnfolder]: 4929/9297 cut-off events. [2023-01-28 10:08:07,871 INFO L131 PetriNetUnfolder]: For 521704/521704 co-relation queries the response was YES. [2023-01-28 10:08:07,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111079 conditions, 9297 events. 4929/9297 cut-off events. For 521704/521704 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 75428 event pairs, 658 based on Foata normal form. 2/9299 useless extension candidates. Maximal degree in co-relation 110828. Up to 7983 conditions per place. [2023-01-28 10:08:08,003 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 1487 selfloop transitions, 451 changer transitions 1/1939 dead transitions. [2023-01-28 10:08:08,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 723 places, 1939 transitions, 51515 flow [2023-01-28 10:08:08,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-28 10:08:08,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-28 10:08:08,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2018 transitions. [2023-01-28 10:08:08,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2798890429958391 [2023-01-28 10:08:08,005 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2018 transitions. [2023-01-28 10:08:08,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2018 transitions. [2023-01-28 10:08:08,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:08:08,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2018 transitions. [2023-01-28 10:08:08,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 57.65714285714286) internal successors, (2018), 35 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:08:08,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 206.0) internal successors, (7416), 36 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:08:08,009 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 206.0) internal successors, (7416), 36 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:08:08,009 INFO L175 Difference]: Start difference. First operand has 689 places, 1716 transitions, 41348 flow. Second operand 35 states and 2018 transitions. [2023-01-28 10:08:08,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 723 places, 1939 transitions, 51515 flow [2023-01-28 10:08:12,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 708 places, 1939 transitions, 49996 flow, removed 588 selfloop flow, removed 15 redundant places. [2023-01-28 10:08:12,117 INFO L231 Difference]: Finished difference. Result has 719 places, 1846 transitions, 46191 flow [2023-01-28 10:08:12,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=40225, PETRI_DIFFERENCE_MINUEND_PLACES=674, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=338, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=46191, PETRI_PLACES=719, PETRI_TRANSITIONS=1846} [2023-01-28 10:08:12,118 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 698 predicate places. [2023-01-28 10:08:12,118 INFO L495 AbstractCegarLoop]: Abstraction has has 719 places, 1846 transitions, 46191 flow [2023-01-28 10:08:12,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 54.5) internal successors, (1962), 36 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:08:12,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:08:12,119 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:08:12,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2023-01-28 10:08:12,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2023-01-28 10:08:12,319 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:08:12,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:08:12,319 INFO L85 PathProgramCache]: Analyzing trace with hash 701657255, now seen corresponding path program 57 times [2023-01-28 10:08:12,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:08:12,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786081267] [2023-01-28 10:08:12,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:08:12,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:08:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:08:13,084 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:08:13,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:08:13,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786081267] [2023-01-28 10:08:13,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786081267] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:08:13,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836044008] [2023-01-28 10:08:13,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:08:13,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:08:13,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:08:13,086 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:08:13,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-01-28 10:08:13,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-28 10:08:13,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:08:13,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 122 conjunts are in the unsatisfiable core [2023-01-28 10:08:13,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:08:13,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 10:08:13,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 10:08:13,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 10:08:13,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:08:13,686 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:08:13,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-01-28 10:08:13,749 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:08:13,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:08:14,451 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset 8)) (.cse2 (+ c_~A~0.offset 4))) (and (forall ((v_subst_29 Int) (v_ArrVal_2134 (Array Int Int))) (or (<= c_~N~0 (+ v_subst_29 1)) (< (+ 2 v_subst_29) c_~N~0) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2134) c_~A~0.base))) (< (+ (select .cse0 .cse1) (select .cse0 .cse2)) (let ((.cse3 (* v_subst_29 4))) (+ (select .cse0 (+ c_~A~0.offset 4 .cse3)) c_~counter~0 1 (select .cse0 (+ c_~A~0.offset .cse3)))))))) (forall ((v_ArrVal_2134 (Array Int Int)) (v_subst_30 Int)) (or (<= c_~N~0 (+ v_subst_30 1)) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2134) c_~A~0.base))) (<= (let ((.cse5 (* v_subst_30 4))) (+ (select .cse4 (+ c_~A~0.offset .cse5 4)) c_~counter~0 (select .cse4 (+ c_~A~0.offset .cse5)))) (+ (select .cse4 .cse1) (select .cse4 .cse2)))) (< (+ 2 v_subst_30) c_~N~0))))) is different from false [2023-01-28 10:08:14,573 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:08:14,574 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 110 treesize of output 75 [2023-01-28 10:08:14,590 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:08:14,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 326 treesize of output 300 [2023-01-28 10:08:14,614 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:08:14,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 54 treesize of output 66 [2023-01-28 10:08:14,642 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:08:14,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 65 [2023-01-28 10:08:14,984 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:08:14,984 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 109 treesize of output 74 [2023-01-28 10:08:15,000 INFO L321 Elim1Store]: treesize reduction 24, result has 27.3 percent of original size [2023-01-28 10:08:15,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 318 treesize of output 268 [2023-01-28 10:08:15,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:08:15,010 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:08:15,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:08:15,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 21 [2023-01-28 10:08:15,025 INFO L321 Elim1Store]: treesize reduction 24, result has 27.3 percent of original size [2023-01-28 10:08:15,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 39 [2023-01-28 10:08:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:08:15,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836044008] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:08:15,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:08:15,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-01-28 10:08:15,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37001307] [2023-01-28 10:08:15,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:08:15,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-01-28 10:08:15,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:08:15,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-01-28 10:08:15,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1686, Unknown=1, NotChecked=84, Total=1980 [2023-01-28 10:08:15,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 10:08:15,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 719 places, 1846 transitions, 46191 flow. Second operand has 45 states, 45 states have (on average 54.355555555555554) internal successors, (2446), 45 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:08:15,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:08:15,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 10:08:15,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:08:24,952 INFO L130 PetriNetUnfolder]: 5192/9756 cut-off events. [2023-01-28 10:08:24,952 INFO L131 PetriNetUnfolder]: For 580103/580103 co-relation queries the response was YES. [2023-01-28 10:08:25,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119880 conditions, 9756 events. 5192/9756 cut-off events. For 580103/580103 co-relation queries the response was YES. Maximal size of possible extension queue 749. Compared 79551 event pairs, 86 based on Foata normal form. 4/9760 useless extension candidates. Maximal degree in co-relation 119618. Up to 4843 conditions per place. [2023-01-28 10:08:25,088 INFO L137 encePairwiseOnDemand]: 194/206 looper letters, 1327 selfloop transitions, 750 changer transitions 17/2094 dead transitions. [2023-01-28 10:08:25,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 778 places, 2094 transitions, 57325 flow [2023-01-28 10:08:25,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-01-28 10:08:25,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-01-28 10:08:25,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3423 transitions. [2023-01-28 10:08:25,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27694174757281553 [2023-01-28 10:08:25,091 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3423 transitions. [2023-01-28 10:08:25,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3423 transitions. [2023-01-28 10:08:25,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:08:25,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3423 transitions. [2023-01-28 10:08:25,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 57.05) internal successors, (3423), 60 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:08:25,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 206.0) internal successors, (12566), 61 states have internal predecessors, (12566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:08:25,099 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 206.0) internal successors, (12566), 61 states have internal predecessors, (12566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:08:25,099 INFO L175 Difference]: Start difference. First operand has 719 places, 1846 transitions, 46191 flow. Second operand 60 states and 3423 transitions. [2023-01-28 10:08:25,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 778 places, 2094 transitions, 57325 flow [2023-01-28 10:08:29,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 757 places, 2094 transitions, 55142 flow, removed 911 selfloop flow, removed 21 redundant places. [2023-01-28 10:08:30,009 INFO L231 Difference]: Finished difference. Result has 771 places, 1984 transitions, 52001 flow [2023-01-28 10:08:30,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=44058, PETRI_DIFFERENCE_MINUEND_PLACES=698, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1846, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=630, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=52001, PETRI_PLACES=771, PETRI_TRANSITIONS=1984} [2023-01-28 10:08:30,011 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 750 predicate places. [2023-01-28 10:08:30,012 INFO L495 AbstractCegarLoop]: Abstraction has has 771 places, 1984 transitions, 52001 flow [2023-01-28 10:08:30,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 54.355555555555554) internal successors, (2446), 45 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:08:30,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:08:30,012 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:08:30,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-01-28 10:08:30,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2023-01-28 10:08:30,218 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:08:30,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:08:30,218 INFO L85 PathProgramCache]: Analyzing trace with hash 32777677, now seen corresponding path program 58 times [2023-01-28 10:08:30,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:08:30,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334661128] [2023-01-28 10:08:30,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:08:30,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:08:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:08:30,924 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:08:30,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:08:30,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334661128] [2023-01-28 10:08:30,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334661128] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:08:30,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45860419] [2023-01-28 10:08:30,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:08:30,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:08:30,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:08:30,926 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:08:30,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-01-28 10:08:31,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:08:31,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:08:31,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 116 conjunts are in the unsatisfiable core [2023-01-28 10:08:31,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:08:31,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:08:31,314 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 [2023-01-28 10:08:31,485 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:08:31,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-01-28 10:08:31,541 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:08:31,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:08:31,958 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (.cse1 (+ c_~A~0.offset 4))) (and (forall ((v_subst_32 Int) (v_ArrVal_2173 (Array Int Int))) (or (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2173) c_~A~0.base))) (< (+ (select .cse0 .cse1) (select .cse0 (+ c_~A~0.offset (* v_subst_32 4))) (select .cse0 c_~A~0.offset)) (+ c_~counter~0 (select .cse0 .cse2) 1))) (<= c_~N~0 v_subst_32) (< (+ v_subst_32 1) c_~N~0))) (forall ((v_ArrVal_2173 (Array Int Int)) (v_subst_31 Int)) (or (< (+ v_subst_31 1) c_~N~0) (<= c_~N~0 v_subst_31) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2173) c_~A~0.base))) (<= (+ c_~counter~0 (select .cse3 .cse2)) (+ (select .cse3 .cse1) (select .cse3 c_~A~0.offset) (select .cse3 (+ c_~A~0.offset (* v_subst_31 4)))))))))) is different from false [2023-01-28 10:08:31,991 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse3 (+ c_~A~0.offset 4)) (.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse5))) (.cse2 (+ c_~A~0.offset .cse5 4))) (and (forall ((v_ArrVal_2173 (Array Int Int)) (v_subst_31 Int)) (or (< (+ v_subst_31 1) c_~N~0) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2173) c_~A~0.base))) (<= (+ .cse0 c_~counter~0 (select .cse1 .cse2)) (+ (select .cse1 .cse3) (select .cse1 c_~A~0.offset) (select .cse1 (+ c_~A~0.offset (* v_subst_31 4)))))) (<= c_~N~0 v_subst_31))) (forall ((v_subst_32 Int) (v_ArrVal_2173 (Array Int Int))) (or (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2173) c_~A~0.base))) (< (+ (select .cse4 .cse3) (select .cse4 (+ c_~A~0.offset (* v_subst_32 4))) (select .cse4 c_~A~0.offset)) (+ .cse0 c_~counter~0 (select .cse4 .cse2) 1))) (<= c_~N~0 v_subst_32) (< (+ v_subst_32 1) c_~N~0)))))) is different from false [2023-01-28 10:08:32,044 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:08:32,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 112 treesize of output 149 [2023-01-28 10:08:32,069 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:08:32,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 62 [2023-01-28 10:08:32,807 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:08:32,856 INFO L321 Elim1Store]: treesize reduction 44, result has 55.6 percent of original size [2023-01-28 10:08:32,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 65 [2023-01-28 10:08:33,186 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-01-28 10:08:33,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45860419] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:08:33,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:08:33,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2023-01-28 10:08:33,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291608388] [2023-01-28 10:08:33,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:08:33,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-01-28 10:08:33,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:08:33,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-01-28 10:08:33,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1560, Unknown=2, NotChecked=162, Total=1892 [2023-01-28 10:08:33,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 206 [2023-01-28 10:08:33,189 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 771 places, 1984 transitions, 52001 flow. Second operand has 44 states, 44 states have (on average 57.31818181818182) internal successors, (2522), 44 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) [2023-01-28 10:08:33,189 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:08:33,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 206 [2023-01-28 10:08:33,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:08:46,848 INFO L130 PetriNetUnfolder]: 5471/10304 cut-off events. [2023-01-28 10:08:46,848 INFO L131 PetriNetUnfolder]: For 684224/684224 co-relation queries the response was YES. [2023-01-28 10:08:46,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131160 conditions, 10304 events. 5471/10304 cut-off events. For 684224/684224 co-relation queries the response was YES. Maximal size of possible extension queue 802. Compared 84890 event pairs, 687 based on Foata normal form. 4/10308 useless extension candidates. Maximal degree in co-relation 130885. Up to 8993 conditions per place. [2023-01-28 10:08:47,004 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 1685 selfloop transitions, 490 changer transitions 8/2183 dead transitions. [2023-01-28 10:08:47,004 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 817 places, 2183 transitions, 60259 flow [2023-01-28 10:08:47,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-01-28 10:08:47,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-01-28 10:08:47,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2835 transitions. [2023-01-28 10:08:47,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.292811402602768 [2023-01-28 10:08:47,006 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2835 transitions. [2023-01-28 10:08:47,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2835 transitions. [2023-01-28 10:08:47,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:08:47,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2835 transitions. [2023-01-28 10:08:47,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 60.319148936170215) internal successors, (2835), 47 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:08:47,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 206.0) internal successors, (9888), 48 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:08:47,012 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 206.0) internal successors, (9888), 48 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:08:47,012 INFO L175 Difference]: Start difference. First operand has 771 places, 1984 transitions, 52001 flow. Second operand 47 states and 2835 transitions. [2023-01-28 10:08:47,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 817 places, 2183 transitions, 60259 flow [2023-01-28 10:08:53,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 796 places, 2183 transitions, 57235 flow, removed 1454 selfloop flow, removed 21 redundant places. [2023-01-28 10:08:53,906 INFO L231 Difference]: Finished difference. Result has 802 places, 2088 transitions, 53224 flow [2023-01-28 10:08:53,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=49011, PETRI_DIFFERENCE_MINUEND_PLACES=750, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1984, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=400, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=53224, PETRI_PLACES=802, PETRI_TRANSITIONS=2088} [2023-01-28 10:08:53,907 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 781 predicate places. [2023-01-28 10:08:53,907 INFO L495 AbstractCegarLoop]: Abstraction has has 802 places, 2088 transitions, 53224 flow [2023-01-28 10:08:53,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 57.31818181818182) internal successors, (2522), 44 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) [2023-01-28 10:08:53,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:08:53,908 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:08:53,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-01-28 10:08:54,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:08:54,108 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:08:54,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:08:54,109 INFO L85 PathProgramCache]: Analyzing trace with hash 759150231, now seen corresponding path program 59 times [2023-01-28 10:08:54,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:08:54,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562224712] [2023-01-28 10:08:54,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:08:54,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:08:54,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:08:54,777 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:08:54,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:08:54,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562224712] [2023-01-28 10:08:54,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562224712] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:08:54,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247900830] [2023-01-28 10:08:54,778 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:08:54,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:08:54,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:08:54,779 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:08:54,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-01-28 10:08:54,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 10:08:54,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:08:54,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-01-28 10:08:54,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:08:55,166 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:08:55,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:08:55,338 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:08:55,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-01-28 10:08:55,479 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-01-28 10:08:55,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-01-28 10:08:55,554 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:08:55,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247900830] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:08:55,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:08:55,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-01-28 10:08:55,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108454512] [2023-01-28 10:08:55,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:08:55,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-28 10:08:55,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:08:55,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-28 10:08:55,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2023-01-28 10:08:55,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 10:08:55,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 802 places, 2088 transitions, 53224 flow. Second operand has 35 states, 35 states have (on average 54.6) internal successors, (1911), 35 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:08:55,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:08:55,557 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 10:08:55,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:09:04,381 INFO L130 PetriNetUnfolder]: 5678/10745 cut-off events. [2023-01-28 10:09:04,381 INFO L131 PetriNetUnfolder]: For 744936/744936 co-relation queries the response was YES. [2023-01-28 10:09:04,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140669 conditions, 10745 events. 5678/10745 cut-off events. For 744936/744936 co-relation queries the response was YES. Maximal size of possible extension queue 832. Compared 89487 event pairs, 961 based on Foata normal form. 8/10753 useless extension candidates. Maximal degree in co-relation 140389. Up to 10176 conditions per place. [2023-01-28 10:09:04,545 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 2044 selfloop transitions, 179 changer transitions 3/2226 dead transitions. [2023-01-28 10:09:04,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 829 places, 2226 transitions, 63510 flow [2023-01-28 10:09:04,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-28 10:09:04,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-28 10:09:04,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1629 transitions. [2023-01-28 10:09:04,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28242024965325935 [2023-01-28 10:09:04,547 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1629 transitions. [2023-01-28 10:09:04,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1629 transitions. [2023-01-28 10:09:04,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:09:04,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1629 transitions. [2023-01-28 10:09:04,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 58.17857142857143) internal successors, (1629), 28 states have internal predecessors, (1629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:09:04,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 206.0) internal successors, (5974), 29 states have internal predecessors, (5974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:09:04,551 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 206.0) internal successors, (5974), 29 states have internal predecessors, (5974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:09:04,551 INFO L175 Difference]: Start difference. First operand has 802 places, 2088 transitions, 53224 flow. Second operand 28 states and 1629 transitions. [2023-01-28 10:09:04,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 829 places, 2226 transitions, 63510 flow [2023-01-28 10:09:12,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 799 places, 2226 transitions, 62678 flow, removed 185 selfloop flow, removed 30 redundant places. [2023-01-28 10:09:12,677 INFO L231 Difference]: Finished difference. Result has 806 places, 2145 transitions, 56865 flow [2023-01-28 10:09:12,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=52392, PETRI_DIFFERENCE_MINUEND_PLACES=772, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2088, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1944, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=56865, PETRI_PLACES=806, PETRI_TRANSITIONS=2145} [2023-01-28 10:09:12,678 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 785 predicate places. [2023-01-28 10:09:12,678 INFO L495 AbstractCegarLoop]: Abstraction has has 806 places, 2145 transitions, 56865 flow [2023-01-28 10:09:12,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 54.6) internal successors, (1911), 35 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:09:12,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:09:12,679 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:09:12,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2023-01-28 10:09:12,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:09:12,880 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:09:12,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:09:12,880 INFO L85 PathProgramCache]: Analyzing trace with hash -793641339, now seen corresponding path program 60 times [2023-01-28 10:09:12,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:09:12,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628182837] [2023-01-28 10:09:12,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:09:12,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:09:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:09:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:09:13,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:09:13,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628182837] [2023-01-28 10:09:13,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628182837] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:09:13,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806288571] [2023-01-28 10:09:13,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:09:13,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:09:13,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:09:13,583 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:09:13,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-01-28 10:09:13,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 10:09:13,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:09:13,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 112 conjunts are in the unsatisfiable core [2023-01-28 10:09:13,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:09:14,252 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:09:14,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 51 [2023-01-28 10:09:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:09:14,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:09:15,355 INFO L321 Elim1Store]: treesize reduction 42, result has 64.1 percent of original size [2023-01-28 10:09:15,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 85 [2023-01-28 10:09:15,504 INFO L321 Elim1Store]: treesize reduction 66, result has 43.6 percent of original size [2023-01-28 10:09:15,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 62 [2023-01-28 10:09:15,814 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:09:15,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806288571] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:09:15,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:09:15,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-01-28 10:09:15,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335396843] [2023-01-28 10:09:15,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:09:15,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-01-28 10:09:15,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:09:15,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-01-28 10:09:15,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1737, Unknown=0, NotChecked=0, Total=1980 [2023-01-28 10:09:15,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 10:09:15,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 806 places, 2145 transitions, 56865 flow. Second operand has 45 states, 45 states have (on average 54.355555555555554) internal successors, (2446), 45 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:09:15,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:09:15,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 10:09:15,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:09:29,600 INFO L130 PetriNetUnfolder]: 5893/11168 cut-off events. [2023-01-28 10:09:29,600 INFO L131 PetriNetUnfolder]: For 811230/811230 co-relation queries the response was YES. [2023-01-28 10:09:29,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147685 conditions, 11168 events. 5893/11168 cut-off events. For 811230/811230 co-relation queries the response was YES. Maximal size of possible extension queue 878. Compared 94502 event pairs, 72 based on Foata normal form. 8/11176 useless extension candidates. Maximal degree in co-relation 147398. Up to 7362 conditions per place. [2023-01-28 10:09:29,781 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 1628 selfloop transitions, 705 changer transitions 14/2347 dead transitions. [2023-01-28 10:09:29,781 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 863 places, 2347 transitions, 67258 flow [2023-01-28 10:09:29,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-01-28 10:09:29,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-01-28 10:09:29,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3299 transitions. [2023-01-28 10:09:29,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27611315701372613 [2023-01-28 10:09:29,784 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3299 transitions. [2023-01-28 10:09:29,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3299 transitions. [2023-01-28 10:09:29,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:09:29,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3299 transitions. [2023-01-28 10:09:29,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 56.87931034482759) internal successors, (3299), 58 states have internal predecessors, (3299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:09:29,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 206.0) internal successors, (12154), 59 states have internal predecessors, (12154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:09:29,791 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 206.0) internal successors, (12154), 59 states have internal predecessors, (12154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:09:29,791 INFO L175 Difference]: Start difference. First operand has 806 places, 2145 transitions, 56865 flow. Second operand 58 states and 3299 transitions. [2023-01-28 10:09:29,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 863 places, 2347 transitions, 67258 flow [2023-01-28 10:09:38,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 849 places, 2347 transitions, 64777 flow, removed 1177 selfloop flow, removed 14 redundant places. [2023-01-28 10:09:38,301 INFO L231 Difference]: Finished difference. Result has 858 places, 2251 transitions, 60634 flow [2023-01-28 10:09:38,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=54468, PETRI_DIFFERENCE_MINUEND_PLACES=792, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=615, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=60634, PETRI_PLACES=858, PETRI_TRANSITIONS=2251} [2023-01-28 10:09:38,303 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 837 predicate places. [2023-01-28 10:09:38,303 INFO L495 AbstractCegarLoop]: Abstraction has has 858 places, 2251 transitions, 60634 flow [2023-01-28 10:09:38,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 54.355555555555554) internal successors, (2446), 45 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:09:38,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:09:38,303 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:09:38,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2023-01-28 10:09:38,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2023-01-28 10:09:38,504 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:09:38,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:09:38,504 INFO L85 PathProgramCache]: Analyzing trace with hash -2001608571, now seen corresponding path program 61 times [2023-01-28 10:09:38,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:09:38,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062311450] [2023-01-28 10:09:38,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:09:38,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:09:38,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:09:39,331 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:09:39,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:09:39,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062311450] [2023-01-28 10:09:39,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062311450] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:09:39,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758236339] [2023-01-28 10:09:39,332 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:09:39,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:09:39,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:09:39,333 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:09:39,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-01-28 10:09:39,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:09:39,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 102 conjunts are in the unsatisfiable core [2023-01-28 10:09:39,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:09:39,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:09:39,597 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 [2023-01-28 10:09:39,774 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:09:39,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:09:39,987 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse3 (+ c_~A~0.offset .cse6)) (.cse4 (+ c_~A~0.offset .cse6 4)) (.cse1 (+ c_~A~0.offset 8)) (.cse2 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_2288 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2288) c_~A~0.base))) (< (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse1) (select .cse0 .cse2)) (+ c_~counter~0 (select .cse0 .cse3) (select .cse0 .cse4) 1)))) (forall ((v_ArrVal_2288 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2288) c_~A~0.base))) (<= (+ c_~counter~0 (select .cse5 .cse3) (select .cse5 .cse4)) (+ (select .cse5 c_~A~0.offset) (select .cse5 .cse1) (select .cse5 .cse2)))))))) is different from false [2023-01-28 10:09:40,024 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:09:40,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 134 [2023-01-28 10:09:40,061 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:09:40,061 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 39 treesize of output 70 [2023-01-28 10:09:40,265 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:09:40,362 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:09:40,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758236339] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:09:40,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:09:40,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 35 [2023-01-28 10:09:40,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312367534] [2023-01-28 10:09:40,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:09:40,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-01-28 10:09:40,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:09:40,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-01-28 10:09:40,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1142, Unknown=1, NotChecked=68, Total=1332 [2023-01-28 10:09:40,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 10:09:40,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 858 places, 2251 transitions, 60634 flow. Second operand has 37 states, 37 states have (on average 54.45945945945946) internal successors, (2015), 37 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:09:40,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:09:40,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 10:09:40,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:09:51,445 INFO L130 PetriNetUnfolder]: 6267/11879 cut-off events. [2023-01-28 10:09:51,445 INFO L131 PetriNetUnfolder]: For 882478/882478 co-relation queries the response was YES. [2023-01-28 10:09:51,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159352 conditions, 11879 events. 6267/11879 cut-off events. For 882478/882478 co-relation queries the response was YES. Maximal size of possible extension queue 934. Compared 101434 event pairs, 945 based on Foata normal form. 6/11885 useless extension candidates. Maximal degree in co-relation 159056. Up to 10514 conditions per place. [2023-01-28 10:09:51,645 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 1991 selfloop transitions, 450 changer transitions 1/2442 dead transitions. [2023-01-28 10:09:51,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 887 places, 2442 transitions, 70855 flow [2023-01-28 10:09:51,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-28 10:09:51,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-28 10:09:51,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1729 transitions. [2023-01-28 10:09:51,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2797734627831715 [2023-01-28 10:09:51,647 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1729 transitions. [2023-01-28 10:09:51,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1729 transitions. [2023-01-28 10:09:51,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:09:51,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1729 transitions. [2023-01-28 10:09:51,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 57.63333333333333) internal successors, (1729), 30 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:09:51,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 206.0) internal successors, (6386), 31 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:09:51,651 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 206.0) internal successors, (6386), 31 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:09:51,651 INFO L175 Difference]: Start difference. First operand has 858 places, 2251 transitions, 60634 flow. Second operand 30 states and 1729 transitions. [2023-01-28 10:09:51,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 887 places, 2442 transitions, 70855 flow [2023-01-28 10:10:01,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 855 places, 2442 transitions, 67807 flow, removed 1404 selfloop flow, removed 32 redundant places. [2023-01-28 10:10:01,792 INFO L231 Difference]: Finished difference. Result has 866 places, 2373 transitions, 63440 flow [2023-01-28 10:10:01,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=57592, PETRI_DIFFERENCE_MINUEND_PLACES=826, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1807, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=63440, PETRI_PLACES=866, PETRI_TRANSITIONS=2373} [2023-01-28 10:10:01,794 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 845 predicate places. [2023-01-28 10:10:01,794 INFO L495 AbstractCegarLoop]: Abstraction has has 866 places, 2373 transitions, 63440 flow [2023-01-28 10:10:01,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 54.45945945945946) internal successors, (2015), 37 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:10:01,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:10:01,795 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:10:01,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-01-28 10:10:01,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-01-28 10:10:01,996 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:10:01,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:10:01,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1769634401, now seen corresponding path program 62 times [2023-01-28 10:10:01,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:10:01,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604277619] [2023-01-28 10:10:01,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:10:01,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:10:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:10:02,551 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:10:02,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:10:02,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604277619] [2023-01-28 10:10:02,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604277619] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:10:02,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910150355] [2023-01-28 10:10:02,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:10:02,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:10:02,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:10:02,561 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:10:02,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-01-28 10:10:02,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:10:02,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:10:02,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-01-28 10:10:02,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:10:03,026 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:10:03,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-01-28 10:10:03,081 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:10:03,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:10:03,503 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:10:03,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 113 [2023-01-28 10:10:03,913 INFO L321 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-01-28 10:10:03,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 66 [2023-01-28 10:10:04,267 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:10:04,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910150355] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:10:04,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:10:04,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-01-28 10:10:04,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521808292] [2023-01-28 10:10:04,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:10:04,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-01-28 10:10:04,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:10:04,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-01-28 10:10:04,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1481, Unknown=0, NotChecked=0, Total=1722 [2023-01-28 10:10:04,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 10:10:04,271 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 866 places, 2373 transitions, 63440 flow. Second operand has 42 states, 42 states have (on average 61.45238095238095) internal successors, (2581), 42 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:10:04,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:10:04,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 10:10:04,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:10:15,855 INFO L130 PetriNetUnfolder]: 6363/12073 cut-off events. [2023-01-28 10:10:15,855 INFO L131 PetriNetUnfolder]: For 896610/896610 co-relation queries the response was YES. [2023-01-28 10:10:16,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161682 conditions, 12073 events. 6363/12073 cut-off events. For 896610/896610 co-relation queries the response was YES. Maximal size of possible extension queue 955. Compared 103530 event pairs, 1142 based on Foata normal form. 4/12077 useless extension candidates. Maximal degree in co-relation 161378. Up to 11529 conditions per place. [2023-01-28 10:10:16,067 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 2219 selfloop transitions, 248 changer transitions 8/2475 dead transitions. [2023-01-28 10:10:16,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 899 places, 2475 transitions, 71687 flow [2023-01-28 10:10:16,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-28 10:10:16,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-28 10:10:16,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2183 transitions. [2023-01-28 10:10:16,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3116790405482581 [2023-01-28 10:10:16,069 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2183 transitions. [2023-01-28 10:10:16,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2183 transitions. [2023-01-28 10:10:16,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:10:16,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2183 transitions. [2023-01-28 10:10:16,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 64.20588235294117) internal successors, (2183), 34 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:10:16,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 206.0) internal successors, (7210), 35 states have internal predecessors, (7210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:10:16,074 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 206.0) internal successors, (7210), 35 states have internal predecessors, (7210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:10:16,074 INFO L175 Difference]: Start difference. First operand has 866 places, 2373 transitions, 63440 flow. Second operand 34 states and 2183 transitions. [2023-01-28 10:10:16,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 899 places, 2475 transitions, 71687 flow [2023-01-28 10:10:26,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 884 places, 2475 transitions, 70589 flow, removed 438 selfloop flow, removed 15 redundant places. [2023-01-28 10:10:26,373 INFO L231 Difference]: Finished difference. Result has 888 places, 2413 transitions, 65163 flow [2023-01-28 10:10:26,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=62342, PETRI_DIFFERENCE_MINUEND_PLACES=851, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=65163, PETRI_PLACES=888, PETRI_TRANSITIONS=2413} [2023-01-28 10:10:26,374 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 867 predicate places. [2023-01-28 10:10:26,375 INFO L495 AbstractCegarLoop]: Abstraction has has 888 places, 2413 transitions, 65163 flow [2023-01-28 10:10:26,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 61.45238095238095) internal successors, (2581), 42 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:10:26,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:10:26,375 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:10:26,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2023-01-28 10:10:26,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:10:26,576 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:10:26,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:10:26,576 INFO L85 PathProgramCache]: Analyzing trace with hash -254990151, now seen corresponding path program 63 times [2023-01-28 10:10:26,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:10:26,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802115556] [2023-01-28 10:10:26,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:10:26,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:10:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:10:27,161 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:10:27,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:10:27,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802115556] [2023-01-28 10:10:27,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802115556] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:10:27,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310772903] [2023-01-28 10:10:27,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:10:27,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:10:27,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:10:27,162 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:10:27,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-01-28 10:10:27,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 10:10:27,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:10:27,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 121 conjunts are in the unsatisfiable core [2023-01-28 10:10:27,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:10:27,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-01-28 10:10:27,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 10:10:27,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 10:10:27,816 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:10:27,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2023-01-28 10:10:27,902 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:10:27,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:10:28,918 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:10:28,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310772903] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:10:28,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:10:28,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 11] total 38 [2023-01-28 10:10:28,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506133174] [2023-01-28 10:10:28,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:10:28,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-01-28 10:10:28,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:10:28,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-01-28 10:10:28,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1351, Unknown=0, NotChecked=0, Total=1560 [2023-01-28 10:10:28,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 10:10:28,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 888 places, 2413 transitions, 65163 flow. Second operand has 40 states, 40 states have (on average 54.5) internal successors, (2180), 40 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:10:28,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:10:28,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 10:10:28,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:10:48,646 INFO L130 PetriNetUnfolder]: 6474/12321 cut-off events. [2023-01-28 10:10:48,646 INFO L131 PetriNetUnfolder]: For 1002933/1002933 co-relation queries the response was YES. [2023-01-28 10:10:48,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168979 conditions, 12321 events. 6474/12321 cut-off events. For 1002933/1002933 co-relation queries the response was YES. Maximal size of possible extension queue 972. Compared 105740 event pairs, 1165 based on Foata normal form. 2/12323 useless extension candidates. Maximal degree in co-relation 168670. Up to 11672 conditions per place. [2023-01-28 10:10:48,855 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 2258 selfloop transitions, 269 changer transitions 11/2538 dead transitions. [2023-01-28 10:10:48,856 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 927 places, 2538 transitions, 74443 flow [2023-01-28 10:10:48,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-01-28 10:10:48,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-01-28 10:10:48,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2280 transitions. [2023-01-28 10:10:48,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2766990291262136 [2023-01-28 10:10:48,857 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2280 transitions. [2023-01-28 10:10:48,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2280 transitions. [2023-01-28 10:10:48,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:10:48,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2280 transitions. [2023-01-28 10:10:48,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 57.0) internal successors, (2280), 40 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:10:48,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 206.0) internal successors, (8446), 41 states have internal predecessors, (8446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:10:48,863 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 206.0) internal successors, (8446), 41 states have internal predecessors, (8446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:10:48,863 INFO L175 Difference]: Start difference. First operand has 888 places, 2413 transitions, 65163 flow. Second operand 40 states and 2280 transitions. [2023-01-28 10:10:48,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 927 places, 2538 transitions, 74443 flow [2023-01-28 10:11:00,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 910 places, 2538 transitions, 73233 flow, removed 555 selfloop flow, removed 17 redundant places. [2023-01-28 10:11:00,101 INFO L231 Difference]: Finished difference. Result has 922 places, 2465 transitions, 67725 flow [2023-01-28 10:11:00,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=63953, PETRI_DIFFERENCE_MINUEND_PLACES=871, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=67725, PETRI_PLACES=922, PETRI_TRANSITIONS=2465} [2023-01-28 10:11:00,103 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 901 predicate places. [2023-01-28 10:11:00,103 INFO L495 AbstractCegarLoop]: Abstraction has has 922 places, 2465 transitions, 67725 flow [2023-01-28 10:11:00,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 54.5) internal successors, (2180), 40 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:11:00,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:11:00,103 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:11:00,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2023-01-28 10:11:00,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-01-28 10:11:00,304 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:11:00,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:11:00,304 INFO L85 PathProgramCache]: Analyzing trace with hash 2121343109, now seen corresponding path program 64 times [2023-01-28 10:11:00,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:11:00,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984980189] [2023-01-28 10:11:00,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:11:00,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:11:00,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:11:00,974 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:11:00,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:11:00,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984980189] [2023-01-28 10:11:00,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984980189] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:11:00,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646797544] [2023-01-28 10:11:00,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:11:00,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:11:00,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:11:00,976 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:11:00,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-01-28 10:11:01,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:11:01,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:11:01,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 114 conjunts are in the unsatisfiable core [2023-01-28 10:11:01,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:11:01,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:11:01,335 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 [2023-01-28 10:11:01,497 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:11:01,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-01-28 10:11:01,545 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:11:01,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:11:04,962 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:11:04,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 110 treesize of output 147 [2023-01-28 10:11:04,989 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:11:04,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 61 [2023-01-28 10:11:05,533 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:11:05,558 INFO L321 Elim1Store]: treesize reduction 86, result has 13.1 percent of original size [2023-01-28 10:11:05,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 24 [2023-01-28 10:11:05,874 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:11:05,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646797544] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:11:05,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:11:05,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-01-28 10:11:05,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762718583] [2023-01-28 10:11:05,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:11:05,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-01-28 10:11:05,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:11:05,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-01-28 10:11:05,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1726, Unknown=16, NotChecked=0, Total=1980 [2023-01-28 10:11:05,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 206 [2023-01-28 10:11:05,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 922 places, 2465 transitions, 67725 flow. Second operand has 45 states, 45 states have (on average 57.355555555555554) internal successors, (2581), 45 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:11:05,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:11:05,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 206 [2023-01-28 10:11:05,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:11:20,077 INFO L130 PetriNetUnfolder]: 6707/12748 cut-off events. [2023-01-28 10:11:20,078 INFO L131 PetriNetUnfolder]: For 1175371/1175371 co-relation queries the response was YES. [2023-01-28 10:11:20,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181166 conditions, 12748 events. 6707/12748 cut-off events. For 1175371/1175371 co-relation queries the response was YES. Maximal size of possible extension queue 1006. Compared 110529 event pairs, 835 based on Foata normal form. 6/12754 useless extension candidates. Maximal degree in co-relation 180844. Up to 10318 conditions per place. [2023-01-28 10:11:20,296 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 1833 selfloop transitions, 811 changer transitions 3/2647 dead transitions. [2023-01-28 10:11:20,296 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 960 places, 2647 transitions, 78984 flow [2023-01-28 10:11:20,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-01-28 10:11:20,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-01-28 10:11:20,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2351 transitions. [2023-01-28 10:11:20,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2926313169031616 [2023-01-28 10:11:20,298 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2351 transitions. [2023-01-28 10:11:20,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2351 transitions. [2023-01-28 10:11:20,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:11:20,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2351 transitions. [2023-01-28 10:11:20,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 60.282051282051285) internal successors, (2351), 39 states have internal predecessors, (2351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:11:20,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 206.0) internal successors, (8240), 40 states have internal predecessors, (8240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:11:20,303 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 206.0) internal successors, (8240), 40 states have internal predecessors, (8240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:11:20,303 INFO L175 Difference]: Start difference. First operand has 922 places, 2465 transitions, 67725 flow. Second operand 39 states and 2351 transitions. [2023-01-28 10:11:20,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 960 places, 2647 transitions, 78984 flow [2023-01-28 10:11:33,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 941 places, 2647 transitions, 76588 flow, removed 1098 selfloop flow, removed 19 redundant places. [2023-01-28 10:11:33,246 INFO L231 Difference]: Finished difference. Result has 950 places, 2558 transitions, 72325 flow [2023-01-28 10:11:33,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=65329, PETRI_DIFFERENCE_MINUEND_PLACES=903, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=738, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1682, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=72325, PETRI_PLACES=950, PETRI_TRANSITIONS=2558} [2023-01-28 10:11:33,249 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 929 predicate places. [2023-01-28 10:11:33,249 INFO L495 AbstractCegarLoop]: Abstraction has has 950 places, 2558 transitions, 72325 flow [2023-01-28 10:11:33,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 57.355555555555554) internal successors, (2581), 45 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:11:33,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:11:33,249 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:11:33,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-01-28 10:11:33,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-01-28 10:11:33,456 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:11:33,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:11:33,456 INFO L85 PathProgramCache]: Analyzing trace with hash -775306785, now seen corresponding path program 65 times [2023-01-28 10:11:33,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:11:33,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515139910] [2023-01-28 10:11:33,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:11:33,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:11:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:11:34,254 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:11:34,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:11:34,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515139910] [2023-01-28 10:11:34,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515139910] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:11:34,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216605372] [2023-01-28 10:11:34,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:11:34,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:11:34,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:11:34,257 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:11:34,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-01-28 10:11:34,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 10:11:34,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:11:34,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 108 conjunts are in the unsatisfiable core [2023-01-28 10:11:34,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:11:34,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:11:34,592 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 [2023-01-28 10:11:34,769 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:11:34,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:11:34,984 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse3 (+ c_~A~0.offset .cse6 4)) (.cse4 (+ c_~A~0.offset .cse6)) (.cse1 (+ c_~A~0.offset 8)) (.cse2 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_2446 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2446) c_~A~0.base))) (< (+ (select .cse0 .cse1) (select .cse0 .cse2) (select .cse0 c_~A~0.offset)) (+ (select .cse0 .cse3) c_~counter~0 (select .cse0 .cse4) 1)))) (forall ((v_ArrVal_2446 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2446) c_~A~0.base))) (<= (+ (select .cse5 .cse3) c_~counter~0 (select .cse5 .cse4)) (+ (select .cse5 .cse1) (select .cse5 .cse2) (select .cse5 c_~A~0.offset)))))))) is different from false [2023-01-28 10:11:35,022 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:11:35,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 104 treesize of output 132 [2023-01-28 10:11:35,051 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:11:35,051 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 38 treesize of output 69 [2023-01-28 10:11:35,262 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:11:35,362 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:11:35,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216605372] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:11:35,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:11:35,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 37 [2023-01-28 10:11:35,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134277048] [2023-01-28 10:11:35,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:11:35,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-01-28 10:11:35,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:11:35,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-01-28 10:11:35,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1272, Unknown=1, NotChecked=72, Total=1482 [2023-01-28 10:11:35,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 10:11:35,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 950 places, 2558 transitions, 72325 flow. Second operand has 39 states, 39 states have (on average 54.43589743589744) internal successors, (2123), 39 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:11:35,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:11:35,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 10:11:35,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:11:49,029 INFO L130 PetriNetUnfolder]: 6846/13008 cut-off events. [2023-01-28 10:11:49,030 INFO L131 PetriNetUnfolder]: For 1249329/1249329 co-relation queries the response was YES. [2023-01-28 10:11:49,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188759 conditions, 13008 events. 6846/13008 cut-off events. For 1249329/1249329 co-relation queries the response was YES. Maximal size of possible extension queue 1035. Compared 112503 event pairs, 1073 based on Foata normal form. 3/13011 useless extension candidates. Maximal degree in co-relation 188427. Up to 11919 conditions per place. [2023-01-28 10:11:49,264 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 2237 selfloop transitions, 440 changer transitions 2/2679 dead transitions. [2023-01-28 10:11:49,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 981 places, 2679 transitions, 81824 flow [2023-01-28 10:11:49,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-28 10:11:49,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-28 10:11:49,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1836 transitions. [2023-01-28 10:11:49,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27851941747572817 [2023-01-28 10:11:49,266 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1836 transitions. [2023-01-28 10:11:49,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1836 transitions. [2023-01-28 10:11:49,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:11:49,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1836 transitions. [2023-01-28 10:11:49,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 57.375) internal successors, (1836), 32 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:11:49,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 206.0) internal successors, (6798), 33 states have internal predecessors, (6798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:11:49,270 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 206.0) internal successors, (6798), 33 states have internal predecessors, (6798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:11:49,270 INFO L175 Difference]: Start difference. First operand has 950 places, 2558 transitions, 72325 flow. Second operand 32 states and 1836 transitions. [2023-01-28 10:11:49,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 981 places, 2679 transitions, 81824 flow [2023-01-28 10:12:02,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 954 places, 2679 transitions, 77783 flow, removed 1758 selfloop flow, removed 27 redundant places. [2023-01-28 10:12:02,620 INFO L231 Difference]: Finished difference. Result has 959 places, 2607 transitions, 72201 flow [2023-01-28 10:12:02,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=68292, PETRI_DIFFERENCE_MINUEND_PLACES=923, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=402, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=72201, PETRI_PLACES=959, PETRI_TRANSITIONS=2607} [2023-01-28 10:12:02,623 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 938 predicate places. [2023-01-28 10:12:02,623 INFO L495 AbstractCegarLoop]: Abstraction has has 959 places, 2607 transitions, 72201 flow [2023-01-28 10:12:02,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 54.43589743589744) internal successors, (2123), 39 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:12:02,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:12:02,623 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:12:02,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-01-28 10:12:02,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-01-28 10:12:02,829 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:12:02,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:12:02,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1284170627, now seen corresponding path program 66 times [2023-01-28 10:12:02,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:12:02,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981365260] [2023-01-28 10:12:02,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:12:02,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:12:02,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:12:03,564 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:12:03,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:12:03,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981365260] [2023-01-28 10:12:03,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981365260] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:12:03,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034165745] [2023-01-28 10:12:03,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:12:03,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:12:03,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:12:03,566 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:12:03,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-01-28 10:12:03,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 10:12:03,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:12:03,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 115 conjunts are in the unsatisfiable core [2023-01-28 10:12:03,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:12:03,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:12:03,977 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 [2023-01-28 10:12:04,129 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:12:04,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2023-01-28 10:12:04,221 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:12:04,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:12:04,616 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:12:04,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 75 [2023-01-28 10:12:04,625 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:12:04,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2023-01-28 10:12:04,676 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:12:04,807 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:12:04,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034165745] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:12:04,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:12:04,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 13] total 40 [2023-01-28 10:12:04,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086985979] [2023-01-28 10:12:04,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:12:04,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-01-28 10:12:04,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:12:04,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-01-28 10:12:04,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1526, Unknown=7, NotChecked=0, Total=1722 [2023-01-28 10:12:04,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 10:12:04,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 959 places, 2607 transitions, 72201 flow. Second operand has 42 states, 42 states have (on average 54.42857142857143) internal successors, (2286), 42 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:12:04,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:12:04,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 10:12:04,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:12:19,215 INFO L130 PetriNetUnfolder]: 6918/13136 cut-off events. [2023-01-28 10:12:19,215 INFO L131 PetriNetUnfolder]: For 1220900/1220900 co-relation queries the response was YES. [2023-01-28 10:12:19,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187699 conditions, 13136 events. 6918/13136 cut-off events. For 1220900/1220900 co-relation queries the response was YES. Maximal size of possible extension queue 1048. Compared 114307 event pairs, 1102 based on Foata normal form. 2/13138 useless extension candidates. Maximal degree in co-relation 187362. Up to 11619 conditions per place. [2023-01-28 10:12:19,451 INFO L137 encePairwiseOnDemand]: 196/206 looper letters, 2052 selfloop transitions, 644 changer transitions 5/2701 dead transitions. [2023-01-28 10:12:19,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 991 places, 2701 transitions, 80738 flow [2023-01-28 10:12:19,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-28 10:12:19,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-01-28 10:12:19,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1880 transitions. [2023-01-28 10:12:19,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2765519270373639 [2023-01-28 10:12:19,453 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1880 transitions. [2023-01-28 10:12:19,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1880 transitions. [2023-01-28 10:12:19,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:12:19,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1880 transitions. [2023-01-28 10:12:19,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 56.96969696969697) internal successors, (1880), 33 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:12:19,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 206.0) internal successors, (7004), 34 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:12:19,460 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 206.0) internal successors, (7004), 34 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:12:19,460 INFO L175 Difference]: Start difference. First operand has 959 places, 2607 transitions, 72201 flow. Second operand 33 states and 1880 transitions. [2023-01-28 10:12:19,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 991 places, 2701 transitions, 80738 flow [2023-01-28 10:12:33,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 970 places, 2701 transitions, 78658 flow, removed 909 selfloop flow, removed 21 redundant places. [2023-01-28 10:12:33,250 INFO L231 Difference]: Finished difference. Result has 978 places, 2650 transitions, 74319 flow [2023-01-28 10:12:33,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=70371, PETRI_DIFFERENCE_MINUEND_PLACES=938, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=608, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1973, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=74319, PETRI_PLACES=978, PETRI_TRANSITIONS=2650} [2023-01-28 10:12:33,252 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 957 predicate places. [2023-01-28 10:12:33,252 INFO L495 AbstractCegarLoop]: Abstraction has has 978 places, 2650 transitions, 74319 flow [2023-01-28 10:12:33,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 54.42857142857143) internal successors, (2286), 42 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:12:33,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:12:33,253 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:12:33,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2023-01-28 10:12:33,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2023-01-28 10:12:33,458 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:12:33,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:12:33,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1988763423, now seen corresponding path program 67 times [2023-01-28 10:12:33,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:12:33,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462565196] [2023-01-28 10:12:33,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:12:33,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:12:33,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:12:34,060 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:12:34,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:12:34,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462565196] [2023-01-28 10:12:34,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462565196] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:12:34,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403085486] [2023-01-28 10:12:34,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:12:34,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:12:34,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:12:34,062 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:12:34,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-01-28 10:12:34,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:12:34,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-01-28 10:12:34,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:12:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:12:34,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:12:34,642 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:12:34,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-01-28 10:12:34,842 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-01-28 10:12:34,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-01-28 10:12:34,902 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:12:34,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403085486] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:12:34,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:12:34,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 8] total 32 [2023-01-28 10:12:34,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903452360] [2023-01-28 10:12:34,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:12:34,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-28 10:12:34,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:12:34,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-28 10:12:34,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=957, Unknown=0, NotChecked=0, Total=1122 [2023-01-28 10:12:34,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 206 [2023-01-28 10:12:34,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 978 places, 2650 transitions, 74319 flow. Second operand has 34 states, 34 states have (on average 61.64705882352941) internal successors, (2096), 34 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:12:34,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:12:34,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 206 [2023-01-28 10:12:34,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:12:48,707 INFO L130 PetriNetUnfolder]: 7169/13631 cut-off events. [2023-01-28 10:12:48,708 INFO L131 PetriNetUnfolder]: For 1358190/1358190 co-relation queries the response was YES. [2023-01-28 10:12:48,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200906 conditions, 13631 events. 7169/13631 cut-off events. For 1358190/1358190 co-relation queries the response was YES. Maximal size of possible extension queue 1085. Compared 119481 event pairs, 1296 based on Foata normal form. 6/13637 useless extension candidates. Maximal degree in co-relation 200563. Up to 12685 conditions per place. [2023-01-28 10:12:48,965 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 2530 selfloop transitions, 295 changer transitions 3/2828 dead transitions. [2023-01-28 10:12:48,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1008 places, 2828 transitions, 87798 flow [2023-01-28 10:12:48,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 10:12:48,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 10:12:48,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2033 transitions. [2023-01-28 10:12:48,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3183526464140307 [2023-01-28 10:12:48,968 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2033 transitions. [2023-01-28 10:12:48,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2033 transitions. [2023-01-28 10:12:48,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:12:48,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2033 transitions. [2023-01-28 10:12:48,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 65.58064516129032) internal successors, (2033), 31 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:12:48,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 206.0) internal successors, (6592), 32 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:12:48,972 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 206.0) internal successors, (6592), 32 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:12:48,972 INFO L175 Difference]: Start difference. First operand has 978 places, 2650 transitions, 74319 flow. Second operand 31 states and 2033 transitions. [2023-01-28 10:12:48,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1008 places, 2828 transitions, 87798 flow [2023-01-28 10:13:03,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 987 places, 2828 transitions, 86373 flow, removed 537 selfloop flow, removed 21 redundant places. [2023-01-28 10:13:03,756 INFO L231 Difference]: Finished difference. Result has 993 places, 2722 transitions, 78987 flow [2023-01-28 10:13:03,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=72894, PETRI_DIFFERENCE_MINUEND_PLACES=957, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=78987, PETRI_PLACES=993, PETRI_TRANSITIONS=2722} [2023-01-28 10:13:03,758 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 972 predicate places. [2023-01-28 10:13:03,758 INFO L495 AbstractCegarLoop]: Abstraction has has 993 places, 2722 transitions, 78987 flow [2023-01-28 10:13:03,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 61.64705882352941) internal successors, (2096), 34 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:13:03,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:13:03,759 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:13:03,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2023-01-28 10:13:03,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:13:03,965 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:13:03,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:13:03,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1254043705, now seen corresponding path program 68 times [2023-01-28 10:13:03,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:13:03,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116865537] [2023-01-28 10:13:03,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:13:03,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:13:03,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:13:04,665 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:13:04,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:13:04,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116865537] [2023-01-28 10:13:04,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116865537] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:13:04,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586790226] [2023-01-28 10:13:04,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:13:04,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:13:04,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:13:04,666 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:13:04,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-01-28 10:13:04,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:13:04,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:13:04,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 104 conjunts are in the unsatisfiable core [2023-01-28 10:13:04,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:13:04,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:13:04,947 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 [2023-01-28 10:13:05,116 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:13:05,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:13:05,429 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:13:05,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 104 treesize of output 132 [2023-01-28 10:13:05,455 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:13:05,455 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 38 treesize of output 69 [2023-01-28 10:13:05,755 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:13:05,852 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:13:05,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586790226] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:13:05,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:13:05,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 35 [2023-01-28 10:13:05,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032296011] [2023-01-28 10:13:05,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:13:05,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-01-28 10:13:05,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:13:05,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-01-28 10:13:05,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1174, Unknown=7, NotChecked=0, Total=1332 [2023-01-28 10:13:05,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 206 [2023-01-28 10:13:05,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 993 places, 2722 transitions, 78987 flow. Second operand has 37 states, 37 states have (on average 57.45945945945946) internal successors, (2126), 37 states have internal predecessors, (2126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:13:05,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:13:05,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 206 [2023-01-28 10:13:05,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:13:21,795 INFO L130 PetriNetUnfolder]: 7472/14220 cut-off events. [2023-01-28 10:13:21,796 INFO L131 PetriNetUnfolder]: For 1456013/1456013 co-relation queries the response was YES. [2023-01-28 10:13:21,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210849 conditions, 14220 events. 7472/14220 cut-off events. For 1456013/1456013 co-relation queries the response was YES. Maximal size of possible extension queue 1156. Compared 125815 event pairs, 1159 based on Foata normal form. 2/14222 useless extension candidates. Maximal degree in co-relation 210501. Up to 12561 conditions per place. [2023-01-28 10:13:22,062 INFO L137 encePairwiseOnDemand]: 199/206 looper letters, 2386 selfloop transitions, 533 changer transitions 1/2920 dead transitions. [2023-01-28 10:13:22,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1027 places, 2920 transitions, 91417 flow [2023-01-28 10:13:22,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-28 10:13:22,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-28 10:13:22,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2130 transitions. [2023-01-28 10:13:22,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29542302357836336 [2023-01-28 10:13:22,065 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2130 transitions. [2023-01-28 10:13:22,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2130 transitions. [2023-01-28 10:13:22,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:13:22,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2130 transitions. [2023-01-28 10:13:22,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 60.857142857142854) internal successors, (2130), 35 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) [2023-01-28 10:13:22,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 206.0) internal successors, (7416), 36 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:13:22,070 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 206.0) internal successors, (7416), 36 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:13:22,070 INFO L175 Difference]: Start difference. First operand has 993 places, 2722 transitions, 78987 flow. Second operand 35 states and 2130 transitions. [2023-01-28 10:13:22,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1027 places, 2920 transitions, 91417 flow [2023-01-28 10:13:37,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1013 places, 2920 transitions, 88241 flow, removed 1527 selfloop flow, removed 14 redundant places. [2023-01-28 10:13:38,009 INFO L231 Difference]: Finished difference. Result has 1021 places, 2810 transitions, 81522 flow [2023-01-28 10:13:38,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=75811, PETRI_DIFFERENCE_MINUEND_PLACES=979, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=453, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=81522, PETRI_PLACES=1021, PETRI_TRANSITIONS=2810} [2023-01-28 10:13:38,011 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1000 predicate places. [2023-01-28 10:13:38,011 INFO L495 AbstractCegarLoop]: Abstraction has has 1021 places, 2810 transitions, 81522 flow [2023-01-28 10:13:38,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 57.45945945945946) internal successors, (2126), 37 states have internal predecessors, (2126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:13:38,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:13:38,012 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:13:38,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2023-01-28 10:13:38,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:13:38,218 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:13:38,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:13:38,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1236504761, now seen corresponding path program 69 times [2023-01-28 10:13:38,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:13:38,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111249896] [2023-01-28 10:13:38,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:13:38,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:13:38,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:13:38,986 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:13:38,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:13:38,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111249896] [2023-01-28 10:13:38,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111249896] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:13:38,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191529655] [2023-01-28 10:13:38,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:13:38,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:13:38,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:13:38,990 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:13:38,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-01-28 10:13:39,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-28 10:13:39,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:13:39,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 121 conjunts are in the unsatisfiable core [2023-01-28 10:13:39,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:13:39,273 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 13 treesize of output 9 [2023-01-28 10:13:39,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 10:13:39,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 10:13:39,507 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:13:39,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2023-01-28 10:13:39,596 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:13:39,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:13:39,979 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:13:39,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191529655] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:13:39,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:13:39,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 10] total 37 [2023-01-28 10:13:39,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3551496] [2023-01-28 10:13:39,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:13:39,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-01-28 10:13:39,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:13:39,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-01-28 10:13:39,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1286, Unknown=0, NotChecked=0, Total=1482 [2023-01-28 10:13:39,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 10:13:39,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1021 places, 2810 transitions, 81522 flow. Second operand has 39 states, 39 states have (on average 54.53846153846154) internal successors, (2127), 39 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:13:39,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:13:39,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 10:13:39,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:13:57,819 INFO L130 PetriNetUnfolder]: 7542/14362 cut-off events. [2023-01-28 10:13:57,819 INFO L131 PetriNetUnfolder]: For 1449802/1449802 co-relation queries the response was YES. [2023-01-28 10:13:58,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212259 conditions, 14362 events. 7542/14362 cut-off events. For 1449802/1449802 co-relation queries the response was YES. Maximal size of possible extension queue 1162. Compared 127143 event pairs, 1363 based on Foata normal form. 2/14364 useless extension candidates. Maximal degree in co-relation 211903. Up to 13441 conditions per place. [2023-01-28 10:13:58,079 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 2545 selfloop transitions, 373 changer transitions 6/2924 dead transitions. [2023-01-28 10:13:58,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1059 places, 2924 transitions, 90825 flow [2023-01-28 10:13:58,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-01-28 10:13:58,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-01-28 10:13:58,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2235 transitions. [2023-01-28 10:13:58,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2781926811053025 [2023-01-28 10:13:58,081 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2235 transitions. [2023-01-28 10:13:58,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2235 transitions. [2023-01-28 10:13:58,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:13:58,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2235 transitions. [2023-01-28 10:13:58,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 57.30769230769231) internal successors, (2235), 39 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:13:58,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 206.0) internal successors, (8240), 40 states have internal predecessors, (8240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:13:58,086 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 206.0) internal successors, (8240), 40 states have internal predecessors, (8240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:13:58,086 INFO L175 Difference]: Start difference. First operand has 1021 places, 2810 transitions, 81522 flow. Second operand 39 states and 2235 transitions. [2023-01-28 10:13:58,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1059 places, 2924 transitions, 90825 flow [2023-01-28 10:14:14,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1038 places, 2924 transitions, 88594 flow, removed 911 selfloop flow, removed 21 redundant places. [2023-01-28 10:14:14,441 INFO L231 Difference]: Finished difference. Result has 1047 places, 2843 transitions, 82366 flow [2023-01-28 10:14:14,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=79291, PETRI_DIFFERENCE_MINUEND_PLACES=1000, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2810, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=345, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=82366, PETRI_PLACES=1047, PETRI_TRANSITIONS=2843} [2023-01-28 10:14:14,443 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1026 predicate places. [2023-01-28 10:14:14,443 INFO L495 AbstractCegarLoop]: Abstraction has has 1047 places, 2843 transitions, 82366 flow [2023-01-28 10:14:14,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 54.53846153846154) internal successors, (2127), 39 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:14:14,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:14:14,444 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:14:14,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2023-01-28 10:14:14,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:14:14,650 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:14:14,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:14:14,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1280366945, now seen corresponding path program 70 times [2023-01-28 10:14:14,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:14:14,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227675263] [2023-01-28 10:14:14,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:14:14,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:14:14,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:14:15,425 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:14:15,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:14:15,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227675263] [2023-01-28 10:14:15,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227675263] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:14:15,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124488673] [2023-01-28 10:14:15,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:14:15,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:14:15,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:14:15,426 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:14:15,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-01-28 10:14:15,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:14:15,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:14:15,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 116 conjunts are in the unsatisfiable core [2023-01-28 10:14:15,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:14:15,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:14:15,802 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 [2023-01-28 10:14:15,992 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:14:15,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-01-28 10:14:16,046 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:14:16,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:14:16,556 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse3 (+ c_~A~0.offset 4)) (.cse1 (+ c_~A~0.offset .cse5 4)) (.cse2 (+ c_~A~0.offset .cse5))) (and (forall ((v_ArrVal_2643 (Array Int Int)) (v_subst_44 Int)) (or (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2643) c_~A~0.base))) (<= (+ (select .cse0 .cse1) c_~counter~0 (select .cse0 .cse2)) (+ (select .cse0 (+ c_~A~0.offset (* v_subst_44 4))) (select .cse0 .cse3) (select .cse0 c_~A~0.offset)))) (< (+ v_subst_44 1) c_~N~0) (<= c_~N~0 v_subst_44))) (forall ((v_ArrVal_2643 (Array Int Int)) (v_subst_43 Int)) (or (< (+ v_subst_43 1) c_~N~0) (<= c_~N~0 v_subst_43) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2643) c_~A~0.base))) (< (+ (select .cse4 (+ c_~A~0.offset (* v_subst_43 4))) (select .cse4 .cse3) (select .cse4 c_~A~0.offset)) (+ (select .cse4 .cse1) c_~counter~0 (select .cse4 .cse2) 1)))))))) is different from false [2023-01-28 10:14:16,607 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:14:16,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 154 [2023-01-28 10:14:16,653 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:14:16,653 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 89 [2023-01-28 10:14:17,574 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:14:17,628 INFO L321 Elim1Store]: treesize reduction 44, result has 55.6 percent of original size [2023-01-28 10:14:17,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 66 [2023-01-28 10:14:17,957 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:14:17,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124488673] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:14:17,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:14:17,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2023-01-28 10:14:17,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754663894] [2023-01-28 10:14:17,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:14:17,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-01-28 10:14:17,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:14:17,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-01-28 10:14:17,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1646, Unknown=1, NotChecked=82, Total=1892 [2023-01-28 10:14:17,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 10:14:17,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1047 places, 2843 transitions, 82366 flow. Second operand has 44 states, 44 states have (on average 54.31818181818182) internal successors, (2390), 44 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:14:17,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:14:17,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 10:14:17,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:14:36,607 INFO L130 PetriNetUnfolder]: 7817/14889 cut-off events. [2023-01-28 10:14:36,607 INFO L131 PetriNetUnfolder]: For 1686054/1686054 co-relation queries the response was YES. [2023-01-28 10:14:36,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227182 conditions, 14889 events. 7817/14889 cut-off events. For 1686054/1686054 co-relation queries the response was YES. Maximal size of possible extension queue 1223. Compared 133009 event pairs, 1217 based on Foata normal form. 4/14893 useless extension candidates. Maximal degree in co-relation 226816. Up to 13289 conditions per place. [2023-01-28 10:14:36,909 INFO L137 encePairwiseOnDemand]: 197/206 looper letters, 2523 selfloop transitions, 496 changer transitions 8/3027 dead transitions. [2023-01-28 10:14:36,909 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1090 places, 3027 transitions, 94302 flow [2023-01-28 10:14:36,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-01-28 10:14:36,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-01-28 10:14:36,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2517 transitions. [2023-01-28 10:14:36,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2776919682259488 [2023-01-28 10:14:36,912 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2517 transitions. [2023-01-28 10:14:36,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2517 transitions. [2023-01-28 10:14:36,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:14:36,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2517 transitions. [2023-01-28 10:14:36,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 57.20454545454545) internal successors, (2517), 44 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:14:36,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 206.0) internal successors, (9270), 45 states have internal predecessors, (9270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:14:36,920 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 206.0) internal successors, (9270), 45 states have internal predecessors, (9270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:14:36,920 INFO L175 Difference]: Start difference. First operand has 1047 places, 2843 transitions, 82366 flow. Second operand 44 states and 2517 transitions. [2023-01-28 10:14:36,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1090 places, 3027 transitions, 94302 flow [2023-01-28 10:14:56,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1067 places, 3027 transitions, 92487 flow, removed 808 selfloop flow, removed 23 redundant places. [2023-01-28 10:14:56,133 INFO L231 Difference]: Finished difference. Result has 1075 places, 2927 transitions, 85836 flow [2023-01-28 10:14:56,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=80615, PETRI_DIFFERENCE_MINUEND_PLACES=1024, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2843, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=430, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=85836, PETRI_PLACES=1075, PETRI_TRANSITIONS=2927} [2023-01-28 10:14:56,136 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1054 predicate places. [2023-01-28 10:14:56,136 INFO L495 AbstractCegarLoop]: Abstraction has has 1075 places, 2927 transitions, 85836 flow [2023-01-28 10:14:56,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 54.31818181818182) internal successors, (2390), 44 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:14:56,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:14:56,137 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:14:56,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2023-01-28 10:14:56,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2023-01-28 10:14:56,343 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:14:56,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:14:56,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1644674265, now seen corresponding path program 71 times [2023-01-28 10:14:56,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:14:56,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288002915] [2023-01-28 10:14:56,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:14:56,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:14:56,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:14:57,160 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:14:57,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:14:57,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288002915] [2023-01-28 10:14:57,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288002915] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:14:57,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710890176] [2023-01-28 10:14:57,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:14:57,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:14:57,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:14:57,162 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:14:57,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-01-28 10:14:57,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 10:14:57,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:14:57,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-01-28 10:14:57,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:14:57,576 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:14:57,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:14:57,780 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:14:57,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-01-28 10:14:57,978 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:14:57,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710890176] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:14:57,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:14:57,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-01-28 10:14:57,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622860034] [2023-01-28 10:14:57,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:14:57,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-28 10:14:57,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:14:57,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-28 10:14:57,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2023-01-28 10:14:57,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 10:14:57,981 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1075 places, 2927 transitions, 85836 flow. Second operand has 35 states, 35 states have (on average 54.6) internal successors, (1911), 35 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:14:57,981 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:14:57,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 10:14:57,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:15:15,634 INFO L130 PetriNetUnfolder]: 7883/15028 cut-off events. [2023-01-28 10:15:15,635 INFO L131 PetriNetUnfolder]: For 1765199/1765199 co-relation queries the response was YES. [2023-01-28 10:15:15,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231860 conditions, 15028 events. 7883/15028 cut-off events. For 1765199/1765199 co-relation queries the response was YES. Maximal size of possible extension queue 1228. Compared 134405 event pairs, 1466 based on Foata normal form. 7/15035 useless extension candidates. Maximal degree in co-relation 231485. Up to 14095 conditions per place. [2023-01-28 10:15:15,939 INFO L137 encePairwiseOnDemand]: 198/206 looper letters, 2612 selfloop transitions, 387 changer transitions 2/3001 dead transitions. [2023-01-28 10:15:15,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1101 places, 3001 transitions, 94470 flow [2023-01-28 10:15:15,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-28 10:15:15,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-28 10:15:15,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1593 transitions. [2023-01-28 10:15:15,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2761789181692094 [2023-01-28 10:15:15,941 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1593 transitions. [2023-01-28 10:15:15,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1593 transitions. [2023-01-28 10:15:15,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:15:15,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1593 transitions. [2023-01-28 10:15:15,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 56.892857142857146) internal successors, (1593), 28 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:15,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 206.0) internal successors, (5974), 29 states have internal predecessors, (5974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:15,944 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 206.0) internal successors, (5974), 29 states have internal predecessors, (5974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:15,944 INFO L175 Difference]: Start difference. First operand has 1075 places, 2927 transitions, 85836 flow. Second operand 28 states and 1593 transitions. [2023-01-28 10:15:15,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1101 places, 3001 transitions, 94470 flow [2023-01-28 10:15:37,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1077 places, 3001 transitions, 93532 flow, removed 384 selfloop flow, removed 24 redundant places. [2023-01-28 10:15:37,429 INFO L231 Difference]: Finished difference. Result has 1083 places, 2957 transitions, 87777 flow [2023-01-28 10:15:37,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=84872, PETRI_DIFFERENCE_MINUEND_PLACES=1050, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2925, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=87777, PETRI_PLACES=1083, PETRI_TRANSITIONS=2957} [2023-01-28 10:15:37,431 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1062 predicate places. [2023-01-28 10:15:37,431 INFO L495 AbstractCegarLoop]: Abstraction has has 1083 places, 2957 transitions, 87777 flow [2023-01-28 10:15:37,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 54.6) internal successors, (1911), 35 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:37,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:15:37,432 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:15:37,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2023-01-28 10:15:37,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:15:37,633 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:15:37,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:15:37,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1313258647, now seen corresponding path program 72 times [2023-01-28 10:15:37,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:15:37,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334662478] [2023-01-28 10:15:37,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:15:37,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:15:37,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:15:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:15:38,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:15:38,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334662478] [2023-01-28 10:15:38,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334662478] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:15:38,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007103035] [2023-01-28 10:15:38,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:15:38,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:15:38,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:15:38,431 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:15:38,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-01-28 10:15:38,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 10:15:38,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:15:38,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 118 conjunts are in the unsatisfiable core [2023-01-28 10:15:38,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:15:38,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:15:38,812 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 [2023-01-28 10:15:39,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:15:39,022 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:39,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-01-28 10:15:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:15:39,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:15:39,609 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset 8)) (.cse3 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_2720 (Array Int Int)) (|thread1Thread1of1ForFork0_~i~0#1| Int)) (or (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2720) c_~A~0.base))) (<= (let ((.cse1 (* |thread1Thread1of1ForFork0_~i~0#1| 4))) (+ c_~counter~0 (select .cse0 (+ c_~A~0.offset .cse1 4)) (select .cse0 (+ c_~A~0.offset .cse1)))) (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse2) (select .cse0 .cse3)))) (< (+ |thread1Thread1of1ForFork0_~i~0#1| 2) c_~N~0) (<= c_~N~0 (+ |thread1Thread1of1ForFork0_~i~0#1| 1)))) (forall ((v_ArrVal_2720 (Array Int Int)) (|thread1Thread1of1ForFork0_~i~0#1| Int)) (or (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2720) c_~A~0.base))) (< (+ (select .cse4 c_~A~0.offset) (select .cse4 .cse2) (select .cse4 .cse3)) (let ((.cse5 (* |thread1Thread1of1ForFork0_~i~0#1| 4))) (+ c_~counter~0 (select .cse4 (+ c_~A~0.offset .cse5 4)) (select .cse4 (+ c_~A~0.offset .cse5)) 1)))) (< (+ |thread1Thread1of1ForFork0_~i~0#1| 2) c_~N~0) (<= c_~N~0 (+ |thread1Thread1of1ForFork0_~i~0#1| 1)))))) is different from false [2023-01-28 10:15:39,665 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:39,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 102 treesize of output 145 [2023-01-28 10:15:39,699 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:39,699 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 37 treesize of output 65 [2023-01-28 10:15:40,271 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:15:40,320 INFO L321 Elim1Store]: treesize reduction 44, result has 52.7 percent of original size [2023-01-28 10:15:40,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 60 [2023-01-28 10:15:40,649 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:15:40,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007103035] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:15:40,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:15:40,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2023-01-28 10:15:40,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064028777] [2023-01-28 10:15:40,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:15:40,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-01-28 10:15:40,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:15:40,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-01-28 10:15:40,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1632, Unknown=1, NotChecked=82, Total=1892 [2023-01-28 10:15:40,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 10:15:40,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1083 places, 2957 transitions, 87777 flow. Second operand has 44 states, 44 states have (on average 54.31818181818182) internal successors, (2390), 44 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:40,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:15:40,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 10:15:40,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:16:00,397 INFO L130 PetriNetUnfolder]: 8032/15319 cut-off events. [2023-01-28 10:16:00,397 INFO L131 PetriNetUnfolder]: For 1795863/1795863 co-relation queries the response was YES. [2023-01-28 10:16:00,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237002 conditions, 15319 events. 8032/15319 cut-off events. For 1795863/1795863 co-relation queries the response was YES. Maximal size of possible extension queue 1267. Compared 137557 event pairs, 78 based on Foata normal form. 4/15323 useless extension candidates. Maximal degree in co-relation 236620. Up to 6986 conditions per place. [2023-01-28 10:16:00,705 INFO L137 encePairwiseOnDemand]: 195/206 looper letters, 1861 selfloop transitions, 1255 changer transitions 29/3145 dead transitions. [2023-01-28 10:16:00,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1127 places, 3145 transitions, 99397 flow [2023-01-28 10:16:00,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-01-28 10:16:00,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-01-28 10:16:00,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2587 transitions. [2023-01-28 10:16:00,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2790722761596548 [2023-01-28 10:16:00,708 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2587 transitions. [2023-01-28 10:16:00,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2587 transitions. [2023-01-28 10:16:00,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:16:00,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2587 transitions. [2023-01-28 10:16:00,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 57.48888888888889) internal successors, (2587), 45 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) [2023-01-28 10:16:00,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 206.0) internal successors, (9476), 46 states have internal predecessors, (9476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:00,713 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 206.0) internal successors, (9476), 46 states have internal predecessors, (9476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:00,713 INFO L175 Difference]: Start difference. First operand has 1083 places, 2957 transitions, 87777 flow. Second operand 45 states and 2587 transitions. [2023-01-28 10:16:00,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1127 places, 3145 transitions, 99397 flow [2023-01-28 10:16:21,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1107 places, 3145 transitions, 97793 flow, removed 672 selfloop flow, removed 20 redundant places. [2023-01-28 10:16:22,009 INFO L231 Difference]: Finished difference. Result has 1111 places, 3032 transitions, 92234 flow [2023-01-28 10:16:22,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=86176, PETRI_DIFFERENCE_MINUEND_PLACES=1063, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2957, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1760, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=92234, PETRI_PLACES=1111, PETRI_TRANSITIONS=3032} [2023-01-28 10:16:22,011 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1090 predicate places. [2023-01-28 10:16:22,012 INFO L495 AbstractCegarLoop]: Abstraction has has 1111 places, 3032 transitions, 92234 flow [2023-01-28 10:16:22,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 54.31818181818182) internal successors, (2390), 44 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:22,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:16:22,012 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:16:22,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2023-01-28 10:16:22,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:22,213 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:16:22,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:16:22,213 INFO L85 PathProgramCache]: Analyzing trace with hash 839927811, now seen corresponding path program 73 times [2023-01-28 10:16:22,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:16:22,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339332690] [2023-01-28 10:16:22,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:16:22,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:16:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:16:22,943 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:16:22,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:16:22,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339332690] [2023-01-28 10:16:22,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339332690] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:16:22,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350662249] [2023-01-28 10:16:22,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:16:22,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:22,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:16:22,944 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:16:22,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-01-28 10:16:23,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:16:23,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-01-28 10:16:23,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:16:23,380 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:16:23,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:16:23,591 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:23,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-01-28 10:16:23,779 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:16:23,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350662249] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:16:23,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:16:23,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-01-28 10:16:23,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132209211] [2023-01-28 10:16:23,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:16:23,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-28 10:16:23,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:16:23,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-28 10:16:23,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2023-01-28 10:16:23,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 206 [2023-01-28 10:16:23,781 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1111 places, 3032 transitions, 92234 flow. Second operand has 35 states, 35 states have (on average 54.6) internal successors, (1911), 35 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:23,781 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:16:23,781 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 206 [2023-01-28 10:16:23,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-01-28 10:16:38,106 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 10:16:38,107 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 [2023-01-28 10:16:38,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-28 10:16:38,290 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 10:16:38,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2023-01-28 10:16:38,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2023-01-28 10:16:38,493 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (35states, 53/206 universal loopers) in iteration 78,while PetriNetUnfolder was constructing finite prefix that currently has 194215 conditions, 12132 events (6881/12131 cut-off events. For 1399663/1399663 co-relation queries the response was YES. Maximal size of possible extension queue 1300. Compared 104925 event pairs, 1000 based on Foata normal form. 0/12988 useless extension candidates. Maximal degree in co-relation 193856. Up to 11152 conditions per place.). [2023-01-28 10:16:38,495 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-28 10:16:38,495 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-28 10:16:38,495 INFO L445 BasicCegarLoop]: Path program histogram: [73, 1, 1, 1, 1, 1] [2023-01-28 10:16:38,500 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 10:16:38,500 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 10:16:38,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 10:16:38 BasicIcfg [2023-01-28 10:16:38,503 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 10:16:38,504 INFO L158 Benchmark]: Toolchain (without parser) took 774837.15ms. Allocated memory was 352.3MB in the beginning and 9.9GB in the end (delta: 9.5GB). Free memory was 312.7MB in the beginning and 5.3GB in the end (delta: -5.0GB). Peak memory consumption was 5.5GB. Max. memory is 16.0GB. [2023-01-28 10:16:38,504 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 255.9MB. Free memory is still 213.3MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 10:16:38,504 INFO L158 Benchmark]: CACSL2BoogieTranslator took 229.49ms. Allocated memory is still 352.3MB. Free memory was 312.3MB in the beginning and 300.3MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-01-28 10:16:38,504 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.95ms. Allocated memory is still 352.3MB. Free memory was 300.3MB in the beginning and 298.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 10:16:38,505 INFO L158 Benchmark]: Boogie Preprocessor took 23.70ms. Allocated memory is still 352.3MB. Free memory was 298.2MB in the beginning and 296.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 10:16:38,505 INFO L158 Benchmark]: RCFGBuilder took 589.31ms. Allocated memory is still 352.3MB. Free memory was 296.7MB in the beginning and 270.9MB in the end (delta: 25.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. [2023-01-28 10:16:38,505 INFO L158 Benchmark]: TraceAbstraction took 773941.33ms. Allocated memory was 352.3MB in the beginning and 9.9GB in the end (delta: 9.5GB). Free memory was 270.2MB in the beginning and 5.3GB in the end (delta: -5.0GB). Peak memory consumption was 5.4GB. Max. memory is 16.0GB. [2023-01-28 10:16:38,510 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 255.9MB. Free memory is still 213.3MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 229.49ms. Allocated memory is still 352.3MB. Free memory was 312.3MB in the beginning and 300.3MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 47.95ms. Allocated memory is still 352.3MB. Free memory was 300.3MB in the beginning and 298.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 23.70ms. Allocated memory is still 352.3MB. Free memory was 298.2MB in the beginning and 296.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 589.31ms. Allocated memory is still 352.3MB. Free memory was 296.7MB in the beginning and 270.9MB in the end (delta: 25.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. * TraceAbstraction took 773941.33ms. Allocated memory was 352.3MB in the beginning and 9.9GB in the end (delta: 9.5GB). Free memory was 270.2MB in the beginning and 5.3GB in the end (delta: -5.0GB). Peak memory consumption was 5.4GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.4s, 97 PlacesBefore, 21 PlacesAfterwards, 99 TransitionsBefore, 17 TransitionsAfterwards, 500 CoEnabledTransitionPairs, 7 FixpointIterations, 56 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 14 TrivialYvCompositions, 4 ConcurrentYvCompositions, 6 ChoiceCompositions, 97 TotalNumberOfCompositions, 585 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 553, independent: 544, independent conditional: 0, independent unconditional: 544, 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: 264, independent: 259, independent conditional: 0, independent unconditional: 259, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 553, independent: 285, independent conditional: 0, independent unconditional: 285, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 264, unknown conditional: 0, unknown unconditional: 264] , Statistics on independence cache: Total cache size (in pairs): 20, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, 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: 81]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (35states, 53/206 universal loopers) in iteration 78,while PetriNetUnfolder was constructing finite prefix that currently has 194215 conditions, 12132 events (6881/12131 cut-off events. For 1399663/1399663 co-relation queries the response was YES. Maximal size of possible extension queue 1300. Compared 104925 event pairs, 1000 based on Foata normal form. 0/12988 useless extension candidates. Maximal degree in co-relation 193856. Up to 11152 conditions per place.). - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (35states, 53/206 universal loopers) in iteration 78,while PetriNetUnfolder was constructing finite prefix that currently has 194215 conditions, 12132 events (6881/12131 cut-off events. For 1399663/1399663 co-relation queries the response was YES. Maximal size of possible extension queue 1300. Compared 104925 event pairs, 1000 based on Foata normal form. 0/12988 useless extension candidates. Maximal degree in co-relation 193856. Up to 11152 conditions per place.). - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (35states, 53/206 universal loopers) in iteration 78,while PetriNetUnfolder was constructing finite prefix that currently has 194215 conditions, 12132 events (6881/12131 cut-off events. For 1399663/1399663 co-relation queries the response was YES. Maximal size of possible extension queue 1300. Compared 104925 event pairs, 1000 based on Foata normal form. 0/12988 useless extension candidates. Maximal degree in co-relation 193856. Up to 11152 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 121 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: 773.8s, OverallIterations: 78, TraceHistogramMax: 3, PathProgramHistogramMax: 73, EmptinessCheckTime: 0.0s, AutomataDifference: 633.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8863 SdHoareTripleChecker+Valid, 38.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8863 mSDsluCounter, 2951 SdHoareTripleChecker+Invalid, 33.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 3129 IncrementalHoareTripleChecker+Unchecked, 2655 mSDsCounter, 1951 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 68185 IncrementalHoareTripleChecker+Invalid, 73265 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1951 mSolverCounterUnsat, 296 mSDtfsCounter, 68185 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5186 GetRequests, 1658 SyntacticMatches, 231 SemanticMatches, 3297 ConstructedPredicates, 23 IntricatePredicates, 1 DeprecatedPredicates, 50452 ImplicationChecksByTransitivity, 129.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=92234occurred in iteration=77, InterpolantAutomatonStates: 1875, 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: 0.9s SsaConstructionTime, 4.2s SatisfiabilityAnalysisTime, 109.1s InterpolantComputationTime, 3230 NumberOfCodeBlocks, 3230 NumberOfCodeBlocksAsserted, 249 NumberOfCheckSat, 4595 ConstructedInterpolants, 191 QuantifiedInterpolants, 91009 SizeOfPredicates, 2380 NumberOfNonLiveVariables, 20019 ConjunctsInSsa, 6085 ConjunctsInUnsatCore, 228 InterpolantComputations, 5 PerfectInterpolantSequences, 470/2966 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