/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-NoLbe-Before.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/parallel-misc-3-extended.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 07:37:18,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 07:37:18,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 07:37:18,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 07:37:18,133 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 07:37:18,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 07:37:18,140 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 07:37:18,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 07:37:18,149 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 07:37:18,149 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 07:37:18,150 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 07:37:18,150 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 07:37:18,150 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 07:37:18,151 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 07:37:18,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 07:37:18,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 07:37:18,154 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 07:37:18,154 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 07:37:18,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 07:37:18,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 07:37:18,159 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 07:37:18,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 07:37:18,171 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 07:37:18,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 07:37:18,174 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 07:37:18,174 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 07:37:18,174 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 07:37:18,175 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 07:37:18,175 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 07:37:18,176 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 07:37:18,176 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 07:37:18,177 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 07:37:18,178 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 07:37:18,178 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 07:37:18,179 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 07:37:18,179 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 07:37:18,180 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 07:37:18,180 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 07:37:18,180 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 07:37:18,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 07:37:18,181 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 07:37:18,186 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-NoLbe-Before.epf [2022-01-19 07:37:18,213 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 07:37:18,213 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 07:37:18,214 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 07:37:18,214 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 07:37:18,214 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 07:37:18,214 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 07:37:18,215 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 07:37:18,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 07:37:18,215 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 07:37:18,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 07:37:18,215 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 07:37:18,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 07:37:18,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 07:37:18,215 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 07:37:18,216 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 07:37:18,216 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 07:37:18,216 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 07:37:18,216 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 07:37:18,216 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 07:37:18,216 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 07:37:18,216 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 07:37:18,216 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 07:37:18,217 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 07:37:18,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 07:37:18,217 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 07:37:18,217 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 07:37:18,217 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 07:37:18,217 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 07:37:18,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 07:37:18,218 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 07:37:18,218 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 07:37:18,218 INFO L138 SettingsManager]: * When to check the insufficient erros location relative to the other error locations=BEFORE [2022-01-19 07:37:18,218 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 07:37:18,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 07:37:18,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 07:37:18,445 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 07:37:18,446 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 07:37:18,447 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 07:37:18,448 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-3-extended.wvr.c [2022-01-19 07:37:18,502 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04abb7018/0e100600d3d14173a0f644f9719b2d32/FLAG8b69bc74a [2022-01-19 07:37:18,924 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 07:37:18,925 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-3-extended.wvr.c [2022-01-19 07:37:18,935 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04abb7018/0e100600d3d14173a0f644f9719b2d32/FLAG8b69bc74a [2022-01-19 07:37:18,955 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04abb7018/0e100600d3d14173a0f644f9719b2d32 [2022-01-19 07:37:18,958 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 07:37:18,959 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 07:37:18,961 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 07:37:18,961 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 07:37:18,964 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 07:37:18,964 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 07:37:18" (1/1) ... [2022-01-19 07:37:18,967 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e465c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:37:18, skipping insertion in model container [2022-01-19 07:37:18,967 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 07:37:18" (1/1) ... [2022-01-19 07:37:18,973 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 07:37:18,994 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 07:37:19,235 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-3-extended.wvr.c[2856,2869] [2022-01-19 07:37:19,241 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 07:37:19,248 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 07:37:19,282 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-3-extended.wvr.c[2856,2869] [2022-01-19 07:37:19,283 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 07:37:19,295 INFO L208 MainTranslator]: Completed translation [2022-01-19 07:37:19,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:37:19 WrapperNode [2022-01-19 07:37:19,296 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 07:37:19,296 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 07:37:19,296 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 07:37:19,297 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 07:37:19,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:37:19" (1/1) ... [2022-01-19 07:37:19,316 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:37:19" (1/1) ... [2022-01-19 07:37:19,338 INFO L137 Inliner]: procedures = 22, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2022-01-19 07:37:19,338 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 07:37:19,339 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 07:37:19,339 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 07:37:19,339 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 07:37:19,346 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:37:19" (1/1) ... [2022-01-19 07:37:19,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:37:19" (1/1) ... [2022-01-19 07:37:19,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:37:19" (1/1) ... [2022-01-19 07:37:19,359 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:37:19" (1/1) ... [2022-01-19 07:37:19,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:37:19" (1/1) ... [2022-01-19 07:37:19,366 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:37:19" (1/1) ... [2022-01-19 07:37:19,376 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:37:19" (1/1) ... [2022-01-19 07:37:19,378 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 07:37:19,379 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 07:37:19,379 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 07:37:19,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 07:37:19,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:37:19" (1/1) ... [2022-01-19 07:37:19,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 07:37:19,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:37:19,400 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-19 07:37:19,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-19 07:37:19,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 07:37:19,434 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 07:37:19,434 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 07:37:19,434 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 07:37:19,434 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 07:37:19,434 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-19 07:37:19,434 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-19 07:37:19,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 07:37:19,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 07:37:19,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 07:37:19,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 07:37:19,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 07:37:19,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 07:37:19,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 07:37:19,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 07:37:19,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 07:37:19,438 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-19 07:37:19,509 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 07:37:19,511 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 07:37:19,736 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 07:37:19,753 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 07:37:19,754 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-19 07:37:19,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 07:37:19 BoogieIcfgContainer [2022-01-19 07:37:19,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 07:37:19,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 07:37:19,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 07:37:19,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 07:37:19,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 07:37:18" (1/3) ... [2022-01-19 07:37:19,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c248f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 07:37:19, skipping insertion in model container [2022-01-19 07:37:19,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 07:37:19" (2/3) ... [2022-01-19 07:37:19,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c248f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 07:37:19, skipping insertion in model container [2022-01-19 07:37:19,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 07:37:19" (3/3) ... [2022-01-19 07:37:19,762 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-misc-3-extended.wvr.c [2022-01-19 07:37:19,766 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 07:37:19,766 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 07:37:19,766 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 07:37:19,796 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,796 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,797 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,797 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,797 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,797 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,798 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,798 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,798 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,799 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,799 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,799 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,799 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,799 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,800 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,800 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,800 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,801 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,801 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,801 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,802 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,802 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,803 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,803 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,803 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,803 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,803 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,803 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,804 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,804 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,804 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,804 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,806 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,806 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,806 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,807 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,807 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,807 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,807 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,807 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,810 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,810 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,810 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,810 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,811 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,811 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,812 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,812 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,812 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,813 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,813 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 07:37:19,817 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-19 07:37:19,860 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 07:37:19,866 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-19 07:37:19,866 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-19 07:37:19,876 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 123 places, 129 transitions, 282 flow [2022-01-19 07:37:19,921 INFO L129 PetriNetUnfolder]: 16/126 cut-off events. [2022-01-19 07:37:19,922 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-01-19 07:37:19,926 INFO L84 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 126 events. 16/126 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 130 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 81. Up to 4 conditions per place. [2022-01-19 07:37:19,927 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 129 transitions, 282 flow [2022-01-19 07:37:19,931 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 115 transitions, 248 flow [2022-01-19 07:37:19,955 INFO L129 PetriNetUnfolder]: 16/114 cut-off events. [2022-01-19 07:37:19,955 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-01-19 07:37:19,955 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:19,956 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 07:37:19,956 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 07:37:19,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:19,960 INFO L85 PathProgramCache]: Analyzing trace with hash -620095962, now seen corresponding path program 1 times [2022-01-19 07:37:19,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:19,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883927186] [2022-01-19 07:37:19,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:19,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:20,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:20,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:37:20,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:20,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883927186] [2022-01-19 07:37:20,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883927186] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 07:37:20,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 07:37:20,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 07:37:20,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341105139] [2022-01-19 07:37:20,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 07:37:20,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 07:37:20,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:20,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 07:37:20,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 07:37:20,209 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 129 [2022-01-19 07:37:20,214 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 115 transitions, 248 flow. Second operand has 2 states, 2 states have (on average 119.5) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:20,214 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:20,215 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 129 [2022-01-19 07:37:20,216 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:20,295 INFO L129 PetriNetUnfolder]: 22/133 cut-off events. [2022-01-19 07:37:20,300 INFO L130 PetriNetUnfolder]: For 15/16 co-relation queries the response was YES. [2022-01-19 07:37:20,303 INFO L84 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 133 events. 22/133 cut-off events. For 15/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 211 event pairs, 2 based on Foata normal form. 13/127 useless extension candidates. Maximal degree in co-relation 103. Up to 15 conditions per place. [2022-01-19 07:37:20,305 INFO L132 encePairwiseOnDemand]: 125/129 looper letters, 8 selfloop transitions, 0 changer transitions 1/111 dead transitions. [2022-01-19 07:37:20,306 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 111 transitions, 256 flow [2022-01-19 07:37:20,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 07:37:20,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 07:37:20,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 244 transitions. [2022-01-19 07:37:20,321 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9457364341085271 [2022-01-19 07:37:20,321 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 244 transitions. [2022-01-19 07:37:20,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 244 transitions. [2022-01-19 07:37:20,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:20,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 244 transitions. [2022-01-19 07:37:20,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 122.0) internal successors, (244), 2 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:20,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:20,338 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:20,340 INFO L186 Difference]: Start difference. First operand has 109 places, 115 transitions, 248 flow. Second operand 2 states and 244 transitions. [2022-01-19 07:37:20,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 111 transitions, 256 flow [2022-01-19 07:37:20,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 111 transitions, 244 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-01-19 07:37:20,351 INFO L242 Difference]: Finished difference. Result has 104 places, 110 transitions, 226 flow [2022-01-19 07:37:20,353 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=226, PETRI_PLACES=104, PETRI_TRANSITIONS=110} [2022-01-19 07:37:20,356 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, -5 predicate places. [2022-01-19 07:37:20,356 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 110 transitions, 226 flow [2022-01-19 07:37:20,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 119.5) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:20,357 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:20,357 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 07:37:20,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 07:37:20,358 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 07:37:20,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:20,358 INFO L85 PathProgramCache]: Analyzing trace with hash -2011730583, now seen corresponding path program 1 times [2022-01-19 07:37:20,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:20,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778843531] [2022-01-19 07:37:20,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:20,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:20,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:37:20,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:20,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778843531] [2022-01-19 07:37:20,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778843531] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 07:37:20,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 07:37:20,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 07:37:20,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861710502] [2022-01-19 07:37:20,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 07:37:20,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 07:37:20,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:20,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 07:37:20,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 07:37:20,515 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 129 [2022-01-19 07:37:20,516 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 110 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:20,516 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:20,516 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 129 [2022-01-19 07:37:20,516 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:20,582 INFO L129 PetriNetUnfolder]: 41/193 cut-off events. [2022-01-19 07:37:20,582 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-01-19 07:37:20,586 INFO L84 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 193 events. 41/193 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 544 event pairs, 4 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 255. Up to 31 conditions per place. [2022-01-19 07:37:20,587 INFO L132 encePairwiseOnDemand]: 126/129 looper letters, 17 selfloop transitions, 2 changer transitions 0/116 dead transitions. [2022-01-19 07:37:20,587 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 116 transitions, 278 flow [2022-01-19 07:37:20,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 07:37:20,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 07:37:20,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2022-01-19 07:37:20,592 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9121447028423773 [2022-01-19 07:37:20,592 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2022-01-19 07:37:20,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2022-01-19 07:37:20,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:20,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2022-01-19 07:37:20,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:20,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:20,597 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:20,598 INFO L186 Difference]: Start difference. First operand has 104 places, 110 transitions, 226 flow. Second operand 3 states and 353 transitions. [2022-01-19 07:37:20,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 116 transitions, 278 flow [2022-01-19 07:37:20,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 116 transitions, 278 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 07:37:20,602 INFO L242 Difference]: Finished difference. Result has 106 places, 111 transitions, 238 flow [2022-01-19 07:37:20,602 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=106, PETRI_TRANSITIONS=111} [2022-01-19 07:37:20,603 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, -3 predicate places. [2022-01-19 07:37:20,603 INFO L470 AbstractCegarLoop]: Abstraction has has 106 places, 111 transitions, 238 flow [2022-01-19 07:37:20,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:20,604 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:20,604 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 07:37:20,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 07:37:20,604 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 07:37:20,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:20,606 INFO L85 PathProgramCache]: Analyzing trace with hash 464963149, now seen corresponding path program 1 times [2022-01-19 07:37:20,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:20,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018885781] [2022-01-19 07:37:20,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:20,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:20,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:20,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:37:20,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:20,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018885781] [2022-01-19 07:37:20,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018885781] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 07:37:20,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 07:37:20,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 07:37:20,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479792774] [2022-01-19 07:37:20,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 07:37:20,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 07:37:20,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:20,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 07:37:20,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 07:37:20,748 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 129 [2022-01-19 07:37:20,749 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 111 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:20,749 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:20,749 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 129 [2022-01-19 07:37:20,749 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:20,810 INFO L129 PetriNetUnfolder]: 55/217 cut-off events. [2022-01-19 07:37:20,810 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-01-19 07:37:20,812 INFO L84 FinitePrefix]: Finished finitePrefix Result has 349 conditions, 217 events. 55/217 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 807 event pairs, 4 based on Foata normal form. 0/183 useless extension candidates. Maximal degree in co-relation 344. Up to 72 conditions per place. [2022-01-19 07:37:20,813 INFO L132 encePairwiseOnDemand]: 126/129 looper letters, 18 selfloop transitions, 2 changer transitions 0/116 dead transitions. [2022-01-19 07:37:20,813 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 116 transitions, 290 flow [2022-01-19 07:37:20,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 07:37:20,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 07:37:20,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 348 transitions. [2022-01-19 07:37:20,815 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8992248062015504 [2022-01-19 07:37:20,815 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 348 transitions. [2022-01-19 07:37:20,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 348 transitions. [2022-01-19 07:37:20,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:20,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 348 transitions. [2022-01-19 07:37:20,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:20,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:20,818 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:20,818 INFO L186 Difference]: Start difference. First operand has 106 places, 111 transitions, 238 flow. Second operand 3 states and 348 transitions. [2022-01-19 07:37:20,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 116 transitions, 290 flow [2022-01-19 07:37:20,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 116 transitions, 288 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 07:37:20,824 INFO L242 Difference]: Finished difference. Result has 108 places, 112 transitions, 248 flow [2022-01-19 07:37:20,825 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=108, PETRI_TRANSITIONS=112} [2022-01-19 07:37:20,826 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, -1 predicate places. [2022-01-19 07:37:20,827 INFO L470 AbstractCegarLoop]: Abstraction has has 108 places, 112 transitions, 248 flow [2022-01-19 07:37:20,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:20,830 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:20,831 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 07:37:20,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-19 07:37:20,831 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 07:37:20,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:20,832 INFO L85 PathProgramCache]: Analyzing trace with hash -618881529, now seen corresponding path program 1 times [2022-01-19 07:37:20,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:20,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513661481] [2022-01-19 07:37:20,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:20,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:20,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:20,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 07:37:20,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:20,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513661481] [2022-01-19 07:37:20,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513661481] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 07:37:20,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 07:37:20,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 07:37:20,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897877934] [2022-01-19 07:37:20,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 07:37:20,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 07:37:20,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:20,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 07:37:20,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 07:37:20,908 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 129 [2022-01-19 07:37:20,908 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 112 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:20,909 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:20,909 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 129 [2022-01-19 07:37:20,909 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:20,988 INFO L129 PetriNetUnfolder]: 154/500 cut-off events. [2022-01-19 07:37:20,989 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-01-19 07:37:20,992 INFO L84 FinitePrefix]: Finished finitePrefix Result has 694 conditions, 500 events. 154/500 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2355 event pairs, 17 based on Foata normal form. 0/396 useless extension candidates. Maximal degree in co-relation 688. Up to 85 conditions per place. [2022-01-19 07:37:20,996 INFO L132 encePairwiseOnDemand]: 126/129 looper letters, 17 selfloop transitions, 2 changer transitions 0/118 dead transitions. [2022-01-19 07:37:20,997 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 118 transitions, 300 flow [2022-01-19 07:37:20,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 07:37:20,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 07:37:20,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2022-01-19 07:37:20,998 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9121447028423773 [2022-01-19 07:37:20,998 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2022-01-19 07:37:20,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2022-01-19 07:37:20,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:20,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2022-01-19 07:37:21,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:21,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:21,001 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:21,001 INFO L186 Difference]: Start difference. First operand has 108 places, 112 transitions, 248 flow. Second operand 3 states and 353 transitions. [2022-01-19 07:37:21,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 118 transitions, 300 flow [2022-01-19 07:37:21,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 118 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 07:37:21,007 INFO L242 Difference]: Finished difference. Result has 110 places, 113 transitions, 258 flow [2022-01-19 07:37:21,007 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=258, PETRI_PLACES=110, PETRI_TRANSITIONS=113} [2022-01-19 07:37:21,009 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 1 predicate places. [2022-01-19 07:37:21,009 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 113 transitions, 258 flow [2022-01-19 07:37:21,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:21,009 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:21,010 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 07:37:21,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-19 07:37:21,010 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 07:37:21,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:21,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1312628711, now seen corresponding path program 1 times [2022-01-19 07:37:21,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:21,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060367057] [2022-01-19 07:37:21,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:21,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:21,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 07:37:21,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:21,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060367057] [2022-01-19 07:37:21,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060367057] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 07:37:21,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 07:37:21,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 07:37:21,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381747811] [2022-01-19 07:37:21,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 07:37:21,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 07:37:21,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:21,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 07:37:21,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 07:37:21,116 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 129 [2022-01-19 07:37:21,116 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 113 transitions, 258 flow. Second operand has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:21,116 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:21,116 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 129 [2022-01-19 07:37:21,116 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:21,191 INFO L129 PetriNetUnfolder]: 104/394 cut-off events. [2022-01-19 07:37:21,191 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-01-19 07:37:21,194 INFO L84 FinitePrefix]: Finished finitePrefix Result has 528 conditions, 394 events. 104/394 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1529 event pairs, 11 based on Foata normal form. 0/320 useless extension candidates. Maximal degree in co-relation 521. Up to 48 conditions per place. [2022-01-19 07:37:21,198 INFO L132 encePairwiseOnDemand]: 126/129 looper letters, 17 selfloop transitions, 2 changer transitions 0/119 dead transitions. [2022-01-19 07:37:21,198 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 119 transitions, 310 flow [2022-01-19 07:37:21,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 07:37:21,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 07:37:21,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2022-01-19 07:37:21,200 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9121447028423773 [2022-01-19 07:37:21,200 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2022-01-19 07:37:21,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2022-01-19 07:37:21,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:21,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2022-01-19 07:37:21,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:21,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:21,203 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:21,203 INFO L186 Difference]: Start difference. First operand has 110 places, 113 transitions, 258 flow. Second operand 3 states and 353 transitions. [2022-01-19 07:37:21,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 119 transitions, 310 flow [2022-01-19 07:37:21,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 119 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 07:37:21,206 INFO L242 Difference]: Finished difference. Result has 112 places, 114 transitions, 268 flow [2022-01-19 07:37:21,206 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=268, PETRI_PLACES=112, PETRI_TRANSITIONS=114} [2022-01-19 07:37:21,208 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 3 predicate places. [2022-01-19 07:37:21,209 INFO L470 AbstractCegarLoop]: Abstraction has has 112 places, 114 transitions, 268 flow [2022-01-19 07:37:21,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:21,209 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:21,209 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 07:37:21,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-19 07:37:21,210 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 07:37:21,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:21,210 INFO L85 PathProgramCache]: Analyzing trace with hash 880183357, now seen corresponding path program 1 times [2022-01-19 07:37:21,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:21,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677269773] [2022-01-19 07:37:21,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:21,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:21,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:21,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 07:37:21,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:21,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677269773] [2022-01-19 07:37:21,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677269773] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 07:37:21,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 07:37:21,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 07:37:21,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466494990] [2022-01-19 07:37:21,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 07:37:21,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 07:37:21,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:21,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 07:37:21,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 07:37:21,306 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 129 [2022-01-19 07:37:21,307 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 114 transitions, 268 flow. Second operand has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:21,307 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:21,307 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 129 [2022-01-19 07:37:21,307 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:21,397 INFO L129 PetriNetUnfolder]: 151/480 cut-off events. [2022-01-19 07:37:21,397 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-01-19 07:37:21,401 INFO L84 FinitePrefix]: Finished finitePrefix Result has 731 conditions, 480 events. 151/480 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2248 event pairs, 11 based on Foata normal form. 0/396 useless extension candidates. Maximal degree in co-relation 723. Up to 132 conditions per place. [2022-01-19 07:37:21,405 INFO L132 encePairwiseOnDemand]: 126/129 looper letters, 19 selfloop transitions, 2 changer transitions 0/120 dead transitions. [2022-01-19 07:37:21,405 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 120 transitions, 324 flow [2022-01-19 07:37:21,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 07:37:21,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 07:37:21,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 349 transitions. [2022-01-19 07:37:21,407 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9018087855297158 [2022-01-19 07:37:21,407 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 349 transitions. [2022-01-19 07:37:21,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 349 transitions. [2022-01-19 07:37:21,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:21,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 349 transitions. [2022-01-19 07:37:21,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:21,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:21,410 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:21,410 INFO L186 Difference]: Start difference. First operand has 112 places, 114 transitions, 268 flow. Second operand 3 states and 349 transitions. [2022-01-19 07:37:21,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 120 transitions, 324 flow [2022-01-19 07:37:21,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 120 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 07:37:21,437 INFO L242 Difference]: Finished difference. Result has 114 places, 115 transitions, 278 flow [2022-01-19 07:37:21,437 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=278, PETRI_PLACES=114, PETRI_TRANSITIONS=115} [2022-01-19 07:37:21,438 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 5 predicate places. [2022-01-19 07:37:21,438 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 115 transitions, 278 flow [2022-01-19 07:37:21,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:21,439 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:21,439 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 07:37:21,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-19 07:37:21,439 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 07:37:21,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:21,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1934515373, now seen corresponding path program 1 times [2022-01-19 07:37:21,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:21,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48801792] [2022-01-19 07:37:21,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:21,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:21,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:21,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 07:37:21,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:21,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48801792] [2022-01-19 07:37:21,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48801792] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 07:37:21,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 07:37:21,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-19 07:37:21,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922095637] [2022-01-19 07:37:21,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 07:37:21,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-19 07:37:21,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:21,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-19 07:37:21,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-19 07:37:21,568 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 129 [2022-01-19 07:37:21,568 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 115 transitions, 278 flow. Second operand has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:21,568 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:21,568 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 129 [2022-01-19 07:37:21,569 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:21,659 INFO L129 PetriNetUnfolder]: 59/293 cut-off events. [2022-01-19 07:37:21,659 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-01-19 07:37:21,661 INFO L84 FinitePrefix]: Finished finitePrefix Result has 495 conditions, 293 events. 59/293 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1277 event pairs, 20 based on Foata normal form. 12/283 useless extension candidates. Maximal degree in co-relation 486. Up to 57 conditions per place. [2022-01-19 07:37:21,663 INFO L132 encePairwiseOnDemand]: 122/129 looper letters, 17 selfloop transitions, 5 changer transitions 0/121 dead transitions. [2022-01-19 07:37:21,664 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 121 transitions, 341 flow [2022-01-19 07:37:21,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-19 07:37:21,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-01-19 07:37:21,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 461 transitions. [2022-01-19 07:37:21,666 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8934108527131783 [2022-01-19 07:37:21,666 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 461 transitions. [2022-01-19 07:37:21,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 461 transitions. [2022-01-19 07:37:21,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:21,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 461 transitions. [2022-01-19 07:37:21,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.25) internal successors, (461), 4 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:21,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 129.0) internal successors, (645), 5 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:21,669 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 129.0) internal successors, (645), 5 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:21,669 INFO L186 Difference]: Start difference. First operand has 114 places, 115 transitions, 278 flow. Second operand 4 states and 461 transitions. [2022-01-19 07:37:21,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 121 transitions, 341 flow [2022-01-19 07:37:21,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 121 transitions, 339 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 07:37:21,674 INFO L242 Difference]: Finished difference. Result has 118 places, 116 transitions, 307 flow [2022-01-19 07:37:21,674 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=307, PETRI_PLACES=118, PETRI_TRANSITIONS=116} [2022-01-19 07:37:21,675 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 9 predicate places. [2022-01-19 07:37:21,675 INFO L470 AbstractCegarLoop]: Abstraction has has 118 places, 116 transitions, 307 flow [2022-01-19 07:37:21,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:21,675 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:21,676 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 07:37:21,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-19 07:37:21,676 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 07:37:21,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:21,676 INFO L85 PathProgramCache]: Analyzing trace with hash -2066757542, now seen corresponding path program 1 times [2022-01-19 07:37:21,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:21,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59418867] [2022-01-19 07:37:21,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:21,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:21,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:21,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-19 07:37:21,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:21,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59418867] [2022-01-19 07:37:21,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59418867] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 07:37:21,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 07:37:21,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-19 07:37:21,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474917378] [2022-01-19 07:37:21,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 07:37:21,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-19 07:37:21,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:21,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-19 07:37:21,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-19 07:37:21,777 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 129 [2022-01-19 07:37:21,777 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 116 transitions, 307 flow. Second operand has 4 states, 4 states have (on average 112.25) internal successors, (449), 4 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:21,777 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:21,778 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 129 [2022-01-19 07:37:21,778 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:22,003 INFO L129 PetriNetUnfolder]: 391/1567 cut-off events. [2022-01-19 07:37:22,003 INFO L130 PetriNetUnfolder]: For 140/140 co-relation queries the response was YES. [2022-01-19 07:37:22,014 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2444 conditions, 1567 events. 391/1567 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 11837 event pairs, 118 based on Foata normal form. 0/1424 useless extension candidates. Maximal degree in co-relation 2433. Up to 227 conditions per place. [2022-01-19 07:37:22,024 INFO L132 encePairwiseOnDemand]: 122/129 looper letters, 18 selfloop transitions, 4 changer transitions 0/123 dead transitions. [2022-01-19 07:37:22,024 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 123 transitions, 369 flow [2022-01-19 07:37:22,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-19 07:37:22,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-01-19 07:37:22,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 462 transitions. [2022-01-19 07:37:22,026 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8953488372093024 [2022-01-19 07:37:22,026 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 462 transitions. [2022-01-19 07:37:22,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 462 transitions. [2022-01-19 07:37:22,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:22,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 462 transitions. [2022-01-19 07:37:22,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.5) internal successors, (462), 4 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:22,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 129.0) internal successors, (645), 5 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:22,029 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 129.0) internal successors, (645), 5 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:22,029 INFO L186 Difference]: Start difference. First operand has 118 places, 116 transitions, 307 flow. Second operand 4 states and 462 transitions. [2022-01-19 07:37:22,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 123 transitions, 369 flow [2022-01-19 07:37:22,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 123 transitions, 364 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-01-19 07:37:22,033 INFO L242 Difference]: Finished difference. Result has 122 places, 117 transitions, 327 flow [2022-01-19 07:37:22,033 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=327, PETRI_PLACES=122, PETRI_TRANSITIONS=117} [2022-01-19 07:37:22,034 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 13 predicate places. [2022-01-19 07:37:22,034 INFO L470 AbstractCegarLoop]: Abstraction has has 122 places, 117 transitions, 327 flow [2022-01-19 07:37:22,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 112.25) internal successors, (449), 4 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:22,035 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:22,035 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 07:37:22,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-19 07:37:22,035 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 07:37:22,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:22,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1475929136, now seen corresponding path program 1 times [2022-01-19 07:37:22,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:22,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439981932] [2022-01-19 07:37:22,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:22,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:22,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:22,098 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-19 07:37:22,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:22,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439981932] [2022-01-19 07:37:22,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439981932] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 07:37:22,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 07:37:22,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-19 07:37:22,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482215688] [2022-01-19 07:37:22,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 07:37:22,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-19 07:37:22,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:22,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-19 07:37:22,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-19 07:37:22,101 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 129 [2022-01-19 07:37:22,102 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 117 transitions, 327 flow. Second operand has 4 states, 4 states have (on average 112.25) internal successors, (449), 4 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:22,102 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:22,102 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 129 [2022-01-19 07:37:22,102 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:22,277 INFO L129 PetriNetUnfolder]: 207/990 cut-off events. [2022-01-19 07:37:22,277 INFO L130 PetriNetUnfolder]: For 265/265 co-relation queries the response was YES. [2022-01-19 07:37:22,285 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1660 conditions, 990 events. 207/990 cut-off events. For 265/265 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 6848 event pairs, 87 based on Foata normal form. 48/945 useless extension candidates. Maximal degree in co-relation 1647. Up to 200 conditions per place. [2022-01-19 07:37:22,291 INFO L132 encePairwiseOnDemand]: 122/129 looper letters, 17 selfloop transitions, 5 changer transitions 0/123 dead transitions. [2022-01-19 07:37:22,291 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 123 transitions, 388 flow [2022-01-19 07:37:22,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-19 07:37:22,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-01-19 07:37:22,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 461 transitions. [2022-01-19 07:37:22,293 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8934108527131783 [2022-01-19 07:37:22,293 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 461 transitions. [2022-01-19 07:37:22,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 461 transitions. [2022-01-19 07:37:22,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:22,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 461 transitions. [2022-01-19 07:37:22,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.25) internal successors, (461), 4 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:22,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 129.0) internal successors, (645), 5 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:22,295 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 129.0) internal successors, (645), 5 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:22,296 INFO L186 Difference]: Start difference. First operand has 122 places, 117 transitions, 327 flow. Second operand 4 states and 461 transitions. [2022-01-19 07:37:22,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 123 transitions, 388 flow [2022-01-19 07:37:22,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 123 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 07:37:22,299 INFO L242 Difference]: Finished difference. Result has 126 places, 118 transitions, 357 flow [2022-01-19 07:37:22,299 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=357, PETRI_PLACES=126, PETRI_TRANSITIONS=118} [2022-01-19 07:37:22,300 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 17 predicate places. [2022-01-19 07:37:22,300 INFO L470 AbstractCegarLoop]: Abstraction has has 126 places, 118 transitions, 357 flow [2022-01-19 07:37:22,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 112.25) internal successors, (449), 4 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:22,300 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:22,300 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 07:37:22,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-19 07:37:22,301 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 07:37:22,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:22,301 INFO L85 PathProgramCache]: Analyzing trace with hash 183224113, now seen corresponding path program 1 times [2022-01-19 07:37:22,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:22,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410944601] [2022-01-19 07:37:22,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:22,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:22,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:22,469 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-19 07:37:22,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:22,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410944601] [2022-01-19 07:37:22,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410944601] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:37:22,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54794521] [2022-01-19 07:37:22,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:22,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:37:22,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:37:22,475 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 07:37:22,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-19 07:37:22,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:22,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-19 07:37:22,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:37:22,936 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-19 07:37:22,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:37:23,201 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-19 07:37:23,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54794521] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:37:23,202 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:37:23,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2022-01-19 07:37:23,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011973892] [2022-01-19 07:37:23,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:37:23,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-19 07:37:23,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:23,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-19 07:37:23,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-19 07:37:23,204 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 129 [2022-01-19 07:37:23,205 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 118 transitions, 357 flow. Second operand has 7 states, 7 states have (on average 108.42857142857143) internal successors, (759), 7 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:23,205 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:23,205 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 129 [2022-01-19 07:37:23,205 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:23,746 INFO L129 PetriNetUnfolder]: 894/3876 cut-off events. [2022-01-19 07:37:23,746 INFO L130 PetriNetUnfolder]: For 951/951 co-relation queries the response was YES. [2022-01-19 07:37:23,775 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6994 conditions, 3876 events. 894/3876 cut-off events. For 951/951 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 35845 event pairs, 111 based on Foata normal form. 1/3592 useless extension candidates. Maximal degree in co-relation 6979. Up to 878 conditions per place. [2022-01-19 07:37:23,793 INFO L132 encePairwiseOnDemand]: 119/129 looper letters, 36 selfloop transitions, 12 changer transitions 4/153 dead transitions. [2022-01-19 07:37:23,793 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 153 transitions, 544 flow [2022-01-19 07:37:23,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 07:37:23,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 07:37:23,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 795 transitions. [2022-01-19 07:37:23,795 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8803986710963455 [2022-01-19 07:37:23,795 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 795 transitions. [2022-01-19 07:37:23,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 795 transitions. [2022-01-19 07:37:23,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:23,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 795 transitions. [2022-01-19 07:37:23,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 113.57142857142857) internal successors, (795), 7 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:23,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 129.0) internal successors, (1032), 8 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:23,799 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 129.0) internal successors, (1032), 8 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:23,799 INFO L186 Difference]: Start difference. First operand has 126 places, 118 transitions, 357 flow. Second operand 7 states and 795 transitions. [2022-01-19 07:37:23,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 153 transitions, 544 flow [2022-01-19 07:37:23,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 153 transitions, 539 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-01-19 07:37:23,805 INFO L242 Difference]: Finished difference. Result has 136 places, 129 transitions, 434 flow [2022-01-19 07:37:23,806 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=434, PETRI_PLACES=136, PETRI_TRANSITIONS=129} [2022-01-19 07:37:23,806 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 27 predicate places. [2022-01-19 07:37:23,806 INFO L470 AbstractCegarLoop]: Abstraction has has 136 places, 129 transitions, 434 flow [2022-01-19 07:37:23,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 108.42857142857143) internal successors, (759), 7 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:23,807 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:23,807 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 07:37:23,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-19 07:37:24,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-19 07:37:24,027 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 07:37:24,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:24,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1507117653, now seen corresponding path program 2 times [2022-01-19 07:37:24,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:24,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850055878] [2022-01-19 07:37:24,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:24,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:24,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:24,175 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 07:37:24,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:24,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850055878] [2022-01-19 07:37:24,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850055878] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:37:24,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771369618] [2022-01-19 07:37:24,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 07:37:24,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:37:24,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:37:24,178 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 07:37:24,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-19 07:37:24,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 07:37:24,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 07:37:24,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-19 07:37:24,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:37:24,510 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 07:37:24,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:37:24,745 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 07:37:24,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771369618] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:37:24,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:37:24,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2022-01-19 07:37:24,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351828817] [2022-01-19 07:37:24,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:37:24,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-19 07:37:24,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:24,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-19 07:37:24,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-19 07:37:24,748 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 129 [2022-01-19 07:37:24,749 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 129 transitions, 434 flow. Second operand has 8 states, 8 states have (on average 108.125) internal successors, (865), 8 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:24,749 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:24,749 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 129 [2022-01-19 07:37:24,749 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:25,400 INFO L129 PetriNetUnfolder]: 1065/4698 cut-off events. [2022-01-19 07:37:25,400 INFO L130 PetriNetUnfolder]: For 2113/2267 co-relation queries the response was YES. [2022-01-19 07:37:25,445 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9842 conditions, 4698 events. 1065/4698 cut-off events. For 2113/2267 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 45775 event pairs, 132 based on Foata normal form. 117/4475 useless extension candidates. Maximal degree in co-relation 9822. Up to 853 conditions per place. [2022-01-19 07:37:25,469 INFO L132 encePairwiseOnDemand]: 119/129 looper letters, 43 selfloop transitions, 26 changer transitions 4/174 dead transitions. [2022-01-19 07:37:25,470 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 174 transitions, 736 flow [2022-01-19 07:37:25,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-19 07:37:25,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-01-19 07:37:25,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 911 transitions. [2022-01-19 07:37:25,472 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8827519379844961 [2022-01-19 07:37:25,472 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 911 transitions. [2022-01-19 07:37:25,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 911 transitions. [2022-01-19 07:37:25,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:25,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 911 transitions. [2022-01-19 07:37:25,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 113.875) internal successors, (911), 8 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:25,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 129.0) internal successors, (1161), 9 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:25,477 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 129.0) internal successors, (1161), 9 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:25,477 INFO L186 Difference]: Start difference. First operand has 136 places, 129 transitions, 434 flow. Second operand 8 states and 911 transitions. [2022-01-19 07:37:25,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 174 transitions, 736 flow [2022-01-19 07:37:25,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 174 transitions, 718 flow, removed 9 selfloop flow, removed 2 redundant places. [2022-01-19 07:37:25,486 INFO L242 Difference]: Finished difference. Result has 143 places, 143 transitions, 577 flow [2022-01-19 07:37:25,486 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=577, PETRI_PLACES=143, PETRI_TRANSITIONS=143} [2022-01-19 07:37:25,487 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 34 predicate places. [2022-01-19 07:37:25,487 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 143 transitions, 577 flow [2022-01-19 07:37:25,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 108.125) internal successors, (865), 8 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:25,487 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:25,488 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 07:37:25,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-19 07:37:25,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-19 07:37:25,704 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 07:37:25,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:25,704 INFO L85 PathProgramCache]: Analyzing trace with hash -541813209, now seen corresponding path program 3 times [2022-01-19 07:37:25,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:25,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285968283] [2022-01-19 07:37:25,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:25,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:25,806 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 07:37:25,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:25,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285968283] [2022-01-19 07:37:25,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285968283] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:37:25,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635700944] [2022-01-19 07:37:25,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 07:37:25,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:37:25,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:37:25,808 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 07:37:25,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-19 07:37:25,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-19 07:37:25,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 07:37:25,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-19 07:37:25,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:37:26,128 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 07:37:26,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:37:26,385 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 07:37:26,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635700944] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:37:26,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:37:26,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2022-01-19 07:37:26,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951880391] [2022-01-19 07:37:26,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:37:26,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-19 07:37:26,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:26,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-19 07:37:26,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-19 07:37:26,388 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 129 [2022-01-19 07:37:26,388 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 143 transitions, 577 flow. Second operand has 8 states, 8 states have (on average 108.125) internal successors, (865), 8 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:26,388 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:26,389 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 129 [2022-01-19 07:37:26,389 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:27,271 INFO L129 PetriNetUnfolder]: 1418/6282 cut-off events. [2022-01-19 07:37:27,272 INFO L130 PetriNetUnfolder]: For 4973/5274 co-relation queries the response was YES. [2022-01-19 07:37:27,417 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14560 conditions, 6282 events. 1418/6282 cut-off events. For 4973/5274 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 66012 event pairs, 127 based on Foata normal form. 117/5935 useless extension candidates. Maximal degree in co-relation 14537. Up to 942 conditions per place. [2022-01-19 07:37:27,448 INFO L132 encePairwiseOnDemand]: 119/129 looper letters, 57 selfloop transitions, 28 changer transitions 4/190 dead transitions. [2022-01-19 07:37:27,448 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 190 transitions, 959 flow [2022-01-19 07:37:27,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-19 07:37:27,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-01-19 07:37:27,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 913 transitions. [2022-01-19 07:37:27,451 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8846899224806202 [2022-01-19 07:37:27,451 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 913 transitions. [2022-01-19 07:37:27,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 913 transitions. [2022-01-19 07:37:27,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:27,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 913 transitions. [2022-01-19 07:37:27,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 114.125) internal successors, (913), 8 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:27,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 129.0) internal successors, (1161), 9 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:27,456 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 129.0) internal successors, (1161), 9 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:27,456 INFO L186 Difference]: Start difference. First operand has 143 places, 143 transitions, 577 flow. Second operand 8 states and 913 transitions. [2022-01-19 07:37:27,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 190 transitions, 959 flow [2022-01-19 07:37:27,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 190 transitions, 874 flow, removed 39 selfloop flow, removed 3 redundant places. [2022-01-19 07:37:27,469 INFO L242 Difference]: Finished difference. Result has 148 places, 159 transitions, 697 flow [2022-01-19 07:37:27,469 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=697, PETRI_PLACES=148, PETRI_TRANSITIONS=159} [2022-01-19 07:37:27,469 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 39 predicate places. [2022-01-19 07:37:27,470 INFO L470 AbstractCegarLoop]: Abstraction has has 148 places, 159 transitions, 697 flow [2022-01-19 07:37:27,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 108.125) internal successors, (865), 8 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:27,470 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:27,470 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 07:37:27,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-19 07:37:27,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:37:27,696 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 07:37:27,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:27,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1027287213, now seen corresponding path program 4 times [2022-01-19 07:37:27,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:27,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684354196] [2022-01-19 07:37:27,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:27,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:27,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:27,897 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:37:27,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:27,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684354196] [2022-01-19 07:37:27,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684354196] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:37:27,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598376552] [2022-01-19 07:37:27,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 07:37:27,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:37:27,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:37:27,899 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 07:37:27,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-19 07:37:27,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 07:37:27,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 07:37:27,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-19 07:37:27,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:37:28,272 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:37:28,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:37:28,541 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:37:28,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598376552] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:37:28,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:37:28,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2022-01-19 07:37:28,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207502681] [2022-01-19 07:37:28,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:37:28,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-19 07:37:28,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:28,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-19 07:37:28,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-01-19 07:37:28,544 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 129 [2022-01-19 07:37:28,545 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 159 transitions, 697 flow. Second operand has 9 states, 9 states have (on average 107.88888888888889) internal successors, (971), 9 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:28,545 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:28,545 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 129 [2022-01-19 07:37:28,545 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:29,698 INFO L129 PetriNetUnfolder]: 1673/7467 cut-off events. [2022-01-19 07:37:29,698 INFO L130 PetriNetUnfolder]: For 6596/7193 co-relation queries the response was YES. [2022-01-19 07:37:29,752 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17561 conditions, 7467 events. 1673/7467 cut-off events. For 6596/7193 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 81557 event pairs, 161 based on Foata normal form. 233/7130 useless extension candidates. Maximal degree in co-relation 17537. Up to 1169 conditions per place. [2022-01-19 07:37:29,791 INFO L132 encePairwiseOnDemand]: 119/129 looper letters, 50 selfloop transitions, 61 changer transitions 4/216 dead transitions. [2022-01-19 07:37:29,792 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 216 transitions, 1174 flow [2022-01-19 07:37:29,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 07:37:29,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 07:37:29,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1029 transitions. [2022-01-19 07:37:29,795 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8863049095607235 [2022-01-19 07:37:29,795 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1029 transitions. [2022-01-19 07:37:29,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1029 transitions. [2022-01-19 07:37:29,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:29,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1029 transitions. [2022-01-19 07:37:29,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 114.33333333333333) internal successors, (1029), 9 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:29,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 129.0) internal successors, (1290), 10 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:29,800 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 129.0) internal successors, (1290), 10 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:29,801 INFO L186 Difference]: Start difference. First operand has 148 places, 159 transitions, 697 flow. Second operand 9 states and 1029 transitions. [2022-01-19 07:37:29,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 216 transitions, 1174 flow [2022-01-19 07:37:29,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 216 transitions, 1142 flow, removed 16 selfloop flow, removed 2 redundant places. [2022-01-19 07:37:29,814 INFO L242 Difference]: Finished difference. Result has 155 places, 178 transitions, 962 flow [2022-01-19 07:37:29,814 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=962, PETRI_PLACES=155, PETRI_TRANSITIONS=178} [2022-01-19 07:37:29,815 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 46 predicate places. [2022-01-19 07:37:29,816 INFO L470 AbstractCegarLoop]: Abstraction has has 155 places, 178 transitions, 962 flow [2022-01-19 07:37:29,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 107.88888888888889) internal successors, (971), 9 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:29,816 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:29,816 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 07:37:29,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-19 07:37:30,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:37:30,040 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 07:37:30,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:30,040 INFO L85 PathProgramCache]: Analyzing trace with hash 828404773, now seen corresponding path program 5 times [2022-01-19 07:37:30,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:30,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211125298] [2022-01-19 07:37:30,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:30,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:30,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:37:30,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:30,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211125298] [2022-01-19 07:37:30,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211125298] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:37:30,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026276612] [2022-01-19 07:37:30,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 07:37:30,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:37:30,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:37:30,168 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 07:37:30,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-19 07:37:30,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 07:37:30,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 07:37:30,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-19 07:37:30,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:37:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:37:30,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:37:30,871 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:37:30,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026276612] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:37:30,873 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:37:30,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2022-01-19 07:37:30,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308767777] [2022-01-19 07:37:30,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:37:30,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-19 07:37:30,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:30,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-19 07:37:30,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-01-19 07:37:30,876 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 129 [2022-01-19 07:37:30,877 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 178 transitions, 962 flow. Second operand has 9 states, 9 states have (on average 107.88888888888889) internal successors, (971), 9 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:30,877 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:30,877 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 129 [2022-01-19 07:37:30,877 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:32,281 INFO L129 PetriNetUnfolder]: 2070/9309 cut-off events. [2022-01-19 07:37:32,282 INFO L130 PetriNetUnfolder]: For 12113/13247 co-relation queries the response was YES. [2022-01-19 07:37:32,358 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23530 conditions, 9309 events. 2070/9309 cut-off events. For 12113/13247 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 106746 event pairs, 157 based on Foata normal form. 234/8827 useless extension candidates. Maximal degree in co-relation 23504. Up to 1348 conditions per place. [2022-01-19 07:37:32,407 INFO L132 encePairwiseOnDemand]: 119/129 looper letters, 83 selfloop transitions, 47 changer transitions 4/235 dead transitions. [2022-01-19 07:37:32,408 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 235 transitions, 1525 flow [2022-01-19 07:37:32,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 07:37:32,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 07:37:32,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1029 transitions. [2022-01-19 07:37:32,410 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8863049095607235 [2022-01-19 07:37:32,410 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1029 transitions. [2022-01-19 07:37:32,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1029 transitions. [2022-01-19 07:37:32,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:32,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1029 transitions. [2022-01-19 07:37:32,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 114.33333333333333) internal successors, (1029), 9 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:32,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 129.0) internal successors, (1290), 10 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:32,416 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 129.0) internal successors, (1290), 10 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:32,416 INFO L186 Difference]: Start difference. First operand has 155 places, 178 transitions, 962 flow. Second operand 9 states and 1029 transitions. [2022-01-19 07:37:32,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 235 transitions, 1525 flow [2022-01-19 07:37:32,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 235 transitions, 1337 flow, removed 81 selfloop flow, removed 4 redundant places. [2022-01-19 07:37:32,441 INFO L242 Difference]: Finished difference. Result has 160 places, 197 transitions, 1095 flow [2022-01-19 07:37:32,442 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=888, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1095, PETRI_PLACES=160, PETRI_TRANSITIONS=197} [2022-01-19 07:37:32,442 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 51 predicate places. [2022-01-19 07:37:32,442 INFO L470 AbstractCegarLoop]: Abstraction has has 160 places, 197 transitions, 1095 flow [2022-01-19 07:37:32,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 107.88888888888889) internal successors, (971), 9 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:32,443 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:32,443 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 07:37:32,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-19 07:37:32,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-19 07:37:32,660 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 07:37:32,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:32,660 INFO L85 PathProgramCache]: Analyzing trace with hash -157124963, now seen corresponding path program 6 times [2022-01-19 07:37:32,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:32,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554673846] [2022-01-19 07:37:32,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:32,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:32,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:32,781 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:37:32,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:32,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554673846] [2022-01-19 07:37:32,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554673846] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 07:37:32,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105237594] [2022-01-19 07:37:32,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 07:37:32,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 07:37:32,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 07:37:32,783 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 07:37:32,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-19 07:37:33,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 07:37:33,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 07:37:33,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-19 07:37:33,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 07:37:33,376 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:37:33,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 07:37:33,743 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 07:37:33,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105237594] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 07:37:33,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 07:37:33,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 10 [2022-01-19 07:37:33,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492577212] [2022-01-19 07:37:33,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 07:37:33,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-19 07:37:33,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:33,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-19 07:37:33,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-01-19 07:37:33,746 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 129 [2022-01-19 07:37:33,748 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 197 transitions, 1095 flow. Second operand has 10 states, 10 states have (on average 107.7) internal successors, (1077), 10 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:33,748 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:33,748 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 129 [2022-01-19 07:37:33,748 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:34,869 INFO L129 PetriNetUnfolder]: 1931/8767 cut-off events. [2022-01-19 07:37:34,869 INFO L130 PetriNetUnfolder]: For 11811/13032 co-relation queries the response was YES. [2022-01-19 07:37:34,933 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22085 conditions, 8767 events. 1931/8767 cut-off events. For 11811/13032 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 100217 event pairs, 76 based on Foata normal form. 663/8800 useless extension candidates. Maximal degree in co-relation 22059. Up to 776 conditions per place. [2022-01-19 07:37:34,973 INFO L132 encePairwiseOnDemand]: 119/129 looper letters, 44 selfloop transitions, 102 changer transitions 4/251 dead transitions. [2022-01-19 07:37:34,973 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 251 transitions, 1624 flow [2022-01-19 07:37:34,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-19 07:37:34,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-01-19 07:37:34,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1132 transitions. [2022-01-19 07:37:34,976 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8775193798449612 [2022-01-19 07:37:34,976 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1132 transitions. [2022-01-19 07:37:34,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1132 transitions. [2022-01-19 07:37:34,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:34,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1132 transitions. [2022-01-19 07:37:34,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 113.2) internal successors, (1132), 10 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:34,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 129.0) internal successors, (1419), 11 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:34,982 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 129.0) internal successors, (1419), 11 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:34,982 INFO L186 Difference]: Start difference. First operand has 160 places, 197 transitions, 1095 flow. Second operand 10 states and 1132 transitions. [2022-01-19 07:37:34,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 251 transitions, 1624 flow [2022-01-19 07:37:34,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 251 transitions, 1596 flow, removed 14 selfloop flow, removed 2 redundant places. [2022-01-19 07:37:34,998 INFO L242 Difference]: Finished difference. Result has 168 places, 213 transitions, 1428 flow [2022-01-19 07:37:34,998 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1428, PETRI_PLACES=168, PETRI_TRANSITIONS=213} [2022-01-19 07:37:34,999 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 59 predicate places. [2022-01-19 07:37:34,999 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 213 transitions, 1428 flow [2022-01-19 07:37:34,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 107.7) internal successors, (1077), 10 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:34,999 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:34,999 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 07:37:35,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-19 07:37:35,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-19 07:37:35,219 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 07:37:35,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:35,220 INFO L85 PathProgramCache]: Analyzing trace with hash -317975230, now seen corresponding path program 7 times [2022-01-19 07:37:35,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:35,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421569736] [2022-01-19 07:37:35,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:35,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:35,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 07:37:35,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:35,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421569736] [2022-01-19 07:37:35,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421569736] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 07:37:35,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 07:37:35,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 07:37:35,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699316603] [2022-01-19 07:37:35,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 07:37:35,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 07:37:35,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:35,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 07:37:35,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 07:37:35,255 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 129 [2022-01-19 07:37:35,256 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 213 transitions, 1428 flow. Second operand has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:35,256 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:35,256 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 129 [2022-01-19 07:37:35,256 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:36,189 INFO L129 PetriNetUnfolder]: 1389/6628 cut-off events. [2022-01-19 07:37:36,189 INFO L130 PetriNetUnfolder]: For 11477/12864 co-relation queries the response was YES. [2022-01-19 07:37:36,225 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17866 conditions, 6628 events. 1389/6628 cut-off events. For 11477/12864 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 71845 event pairs, 70 based on Foata normal form. 236/6382 useless extension candidates. Maximal degree in co-relation 17838. Up to 727 conditions per place. [2022-01-19 07:37:36,255 INFO L132 encePairwiseOnDemand]: 125/129 looper letters, 38 selfloop transitions, 4 changer transitions 0/216 dead transitions. [2022-01-19 07:37:36,255 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 216 transitions, 1520 flow [2022-01-19 07:37:36,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 07:37:36,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 07:37:36,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 350 transitions. [2022-01-19 07:37:36,257 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9043927648578811 [2022-01-19 07:37:36,257 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 350 transitions. [2022-01-19 07:37:36,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 350 transitions. [2022-01-19 07:37:36,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:36,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 350 transitions. [2022-01-19 07:37:36,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:36,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:36,259 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:36,259 INFO L186 Difference]: Start difference. First operand has 168 places, 213 transitions, 1428 flow. Second operand 3 states and 350 transitions. [2022-01-19 07:37:36,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 216 transitions, 1520 flow [2022-01-19 07:37:36,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 216 transitions, 1455 flow, removed 10 selfloop flow, removed 5 redundant places. [2022-01-19 07:37:36,279 INFO L242 Difference]: Finished difference. Result has 165 places, 214 transitions, 1385 flow [2022-01-19 07:37:36,280 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=1363, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1385, PETRI_PLACES=165, PETRI_TRANSITIONS=214} [2022-01-19 07:37:36,280 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 56 predicate places. [2022-01-19 07:37:36,280 INFO L470 AbstractCegarLoop]: Abstraction has has 165 places, 214 transitions, 1385 flow [2022-01-19 07:37:36,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:36,280 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:36,280 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 07:37:36,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-19 07:37:36,281 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 07:37:36,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:36,281 INFO L85 PathProgramCache]: Analyzing trace with hash 781976271, now seen corresponding path program 8 times [2022-01-19 07:37:36,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:36,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361288394] [2022-01-19 07:37:36,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:36,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:36,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:36,305 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 07:37:36,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:36,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361288394] [2022-01-19 07:37:36,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361288394] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 07:37:36,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 07:37:36,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 07:37:36,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586561263] [2022-01-19 07:37:36,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 07:37:36,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 07:37:36,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:36,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 07:37:36,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 07:37:36,307 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 129 [2022-01-19 07:37:36,308 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 214 transitions, 1385 flow. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:36,308 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:36,308 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 129 [2022-01-19 07:37:36,308 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:37,544 INFO L129 PetriNetUnfolder]: 3070/11638 cut-off events. [2022-01-19 07:37:37,544 INFO L130 PetriNetUnfolder]: For 22731/23630 co-relation queries the response was YES. [2022-01-19 07:37:37,727 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33305 conditions, 11638 events. 3070/11638 cut-off events. For 22731/23630 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 137865 event pairs, 359 based on Foata normal form. 307/10861 useless extension candidates. Maximal degree in co-relation 33280. Up to 1841 conditions per place. [2022-01-19 07:37:37,780 INFO L132 encePairwiseOnDemand]: 125/129 looper letters, 60 selfloop transitions, 4 changer transitions 0/239 dead transitions. [2022-01-19 07:37:37,780 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 239 transitions, 1760 flow [2022-01-19 07:37:37,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 07:37:37,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 07:37:37,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 352 transitions. [2022-01-19 07:37:37,781 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9095607235142119 [2022-01-19 07:37:37,782 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 352 transitions. [2022-01-19 07:37:37,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 352 transitions. [2022-01-19 07:37:37,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:37,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 352 transitions. [2022-01-19 07:37:37,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:37,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:37,784 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:37,784 INFO L186 Difference]: Start difference. First operand has 165 places, 214 transitions, 1385 flow. Second operand 3 states and 352 transitions. [2022-01-19 07:37:37,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 239 transitions, 1760 flow [2022-01-19 07:37:37,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 239 transitions, 1750 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-01-19 07:37:37,815 INFO L242 Difference]: Finished difference. Result has 167 places, 215 transitions, 1397 flow [2022-01-19 07:37:37,816 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=1375, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1397, PETRI_PLACES=167, PETRI_TRANSITIONS=215} [2022-01-19 07:37:37,816 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 58 predicate places. [2022-01-19 07:37:37,816 INFO L470 AbstractCegarLoop]: Abstraction has has 167 places, 215 transitions, 1397 flow [2022-01-19 07:37:37,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:37,817 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 07:37:37,817 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 07:37:37,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-19 07:37:37,817 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-19 07:37:37,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 07:37:37,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1598635536, now seen corresponding path program 9 times [2022-01-19 07:37:37,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 07:37:37,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645283194] [2022-01-19 07:37:37,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 07:37:37,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 07:37:37,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 07:37:37,849 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-19 07:37:37,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 07:37:37,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645283194] [2022-01-19 07:37:37,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645283194] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 07:37:37,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 07:37:37,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 07:37:37,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037651284] [2022-01-19 07:37:37,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 07:37:37,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 07:37:37,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 07:37:37,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 07:37:37,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 07:37:37,851 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 129 [2022-01-19 07:37:37,851 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 215 transitions, 1397 flow. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:37,852 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 07:37:37,852 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 129 [2022-01-19 07:37:37,852 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 07:37:38,159 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([334] L48-->L50: Formula: (= v_~pos~0_18 (+ v_~pos~0_17 1)) InVars {~pos~0=v_~pos~0_18} OutVars{thread1Thread1of1ForFork0_#t~post2=|v_thread1Thread1of1ForFork0_#t~post2_1|, ~pos~0=v_~pos~0_17} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_#t~post2, ~pos~0][68], [170#(not (= (+ ~d3~0 (* (div ~d3~0 256) (- 256))) 0)), 157#(and (not (<= (+ (div ~d1~0 256) 1) 0)) (<= ~d1~0 (* 256 (div ~d1~0 256)))), 131#(= (+ (- 1) ~g1~0) 0), Black: 136#(= (+ (- 1) ~d1~0) 0), Black: 179#(and (<= ~pos~0 1) (<= 1 ~pos~0)), Black: 178#(and (<= 2 ~pos~0) (<= ~pos~0 2)), Black: 141#(= (+ (- 1) ~g2~0) 0), 69#L72true, 4209#(not (= (+ ~g2~0 (* (- 256) (div ~g2~0 256))) 0)), 3536#(and (<= 2 ~pos~0) (<= ~pos~0 2)), 67#L121-4true, 126#true, Black: 156#(not (= (+ ~d1~0 (* (- 256) (div ~d1~0 256))) 0)), Black: 164#(<= ~d2~0 (* (div ~d2~0 256) 256)), Black: 3531#(= ~pos~0 0), 2864#(and (<= 2 ~pos~0) (<= ~pos~0 2)), 151#(= (+ (- 1) ~d3~0) 0), Black: 849#(and (<= ~pos~0 1) (<= 1 ~pos~0)), Black: 171#(<= ~d3~0 (* (div ~d3~0 256) 256)), Black: 4201#true, 52#L87true, 2192#(and (<= 2 ~pos~0) (<= ~pos~0 2)), 57#L50true, 146#(= (+ (- 1) ~g3~0) 0), Black: 4207#true, 846#true, 175#true, 163#(not (= (+ (* (- 256) (div ~d2~0 256)) ~d2~0) 0)), 1520#(and (<= 2 ~pos~0) (<= ~pos~0 2)), 4215#(not (= (+ ~g3~0 (* (- 256) (div ~g3~0 256))) 0))]) [2022-01-19 07:37:38,159 INFO L384 tUnfolder$Statistics]: this new event has 81 ancestors and is cut-off event [2022-01-19 07:37:38,159 INFO L387 tUnfolder$Statistics]: existing Event has 69 ancestors and is cut-off event [2022-01-19 07:37:38,159 INFO L387 tUnfolder$Statistics]: existing Event has 69 ancestors and is cut-off event [2022-01-19 07:37:38,159 INFO L387 tUnfolder$Statistics]: existing Event has 69 ancestors and is cut-off event [2022-01-19 07:37:38,309 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([334] L48-->L50: Formula: (= v_~pos~0_18 (+ v_~pos~0_17 1)) InVars {~pos~0=v_~pos~0_18} OutVars{thread1Thread1of1ForFork0_#t~post2=|v_thread1Thread1of1ForFork0_#t~post2_1|, ~pos~0=v_~pos~0_17} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_#t~post2, ~pos~0][90], [170#(not (= (+ ~d3~0 (* (div ~d3~0 256) (- 256))) 0)), 3531#(= ~pos~0 0), 164#(<= ~d2~0 (* (div ~d2~0 256) 256)), 157#(and (not (<= (+ (div ~d1~0 256) 1) 0)) (<= ~d1~0 (* 256 (div ~d1~0 256)))), 131#(= (+ (- 1) ~g1~0) 0), Black: 136#(= (+ (- 1) ~d1~0) 0), Black: 179#(and (<= ~pos~0 1) (<= 1 ~pos~0)), Black: 178#(and (<= 2 ~pos~0) (<= ~pos~0 2)), Black: 141#(= (+ (- 1) ~g2~0) 0), 69#L72true, 4209#(not (= (+ ~g2~0 (* (- 256) (div ~g2~0 256))) 0)), 67#L121-4true, 126#true, Black: 156#(not (= (+ ~d1~0 (* (- 256) (div ~d1~0 256))) 0)), Black: 163#(not (= (+ (* (- 256) (div ~d2~0 256)) ~d2~0) 0)), 2860#(= ~pos~0 0), 1519#(= ~pos~0 0), 151#(= (+ (- 1) ~d3~0) 0), Black: 849#(and (<= ~pos~0 1) (<= 1 ~pos~0)), Black: 171#(<= ~d3~0 (* (div ~d3~0 256) 256)), Black: 4201#true, 52#L87true, 146#(= (+ (- 1) ~g3~0) 0), 57#L50true, Black: 4207#true, 846#true, 175#true, 2189#(= ~pos~0 0), 4215#(not (= (+ ~g3~0 (* (- 256) (div ~g3~0 256))) 0))]) [2022-01-19 07:37:38,310 INFO L384 tUnfolder$Statistics]: this new event has 86 ancestors and is cut-off event [2022-01-19 07:37:38,310 INFO L387 tUnfolder$Statistics]: existing Event has 74 ancestors and is cut-off event [2022-01-19 07:37:38,310 INFO L387 tUnfolder$Statistics]: existing Event has 74 ancestors and is cut-off event [2022-01-19 07:37:38,310 INFO L387 tUnfolder$Statistics]: existing Event has 74 ancestors and is cut-off event [2022-01-19 07:37:38,728 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([333] L44-->L50: Formula: (= v_~pos~0_23 (+ v_~pos~0_24 1)) InVars {~pos~0=v_~pos~0_24} OutVars{thread1Thread1of1ForFork0_#t~post1=|v_thread1Thread1of1ForFork0_#t~post1_1|, ~pos~0=v_~pos~0_23} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_#t~post1, ~pos~0][113], [2861#(and (<= ~pos~0 1) (<= 1 ~pos~0)), 170#(not (= (+ ~d3~0 (* (div ~d3~0 256) (- 256))) 0)), Black: 131#(= (+ (- 1) ~g1~0) 0), 164#(<= ~d2~0 (* (div ~d2~0 256) 256)), 2190#(and (<= ~pos~0 1) (<= 1 ~pos~0)), Black: 136#(= (+ (- 1) ~d1~0) 0), Black: 179#(and (<= ~pos~0 1) (<= 1 ~pos~0)), Black: 178#(and (<= 2 ~pos~0) (<= ~pos~0 2)), Black: 141#(= (+ (- 1) ~g2~0) 0), 69#L72true, 4209#(not (= (+ ~g2~0 (* (- 256) (div ~g2~0 256))) 0)), 156#(not (= (+ ~d1~0 (* (- 256) (div ~d1~0 256))) 0)), 67#L121-4true, 126#true, Black: 157#(and (not (<= (+ (div ~d1~0 256) 1) 0)) (<= ~d1~0 (* 256 (div ~d1~0 256)))), Black: 3531#(= ~pos~0 0), Black: 163#(not (= (+ (* (- 256) (div ~d2~0 256)) ~d2~0) 0)), 151#(= (+ (- 1) ~d3~0) 0), Black: 849#(and (<= ~pos~0 1) (<= 1 ~pos~0)), 52#L87true, Black: 4201#true, Black: 171#(<= ~d3~0 (* (div ~d3~0 256) 256)), 57#L50true, 146#(= (+ (- 1) ~g3~0) 0), Black: 4207#true, 1521#(and (<= ~pos~0 1) (<= 1 ~pos~0)), 846#true, 3532#(and (<= ~pos~0 1) (<= 1 ~pos~0)), 175#true, 4215#(not (= (+ ~g3~0 (* (- 256) (div ~g3~0 256))) 0))]) [2022-01-19 07:37:38,728 INFO L384 tUnfolder$Statistics]: this new event has 94 ancestors and is cut-off event [2022-01-19 07:37:38,728 INFO L387 tUnfolder$Statistics]: existing Event has 94 ancestors and is cut-off event [2022-01-19 07:37:38,729 INFO L387 tUnfolder$Statistics]: existing Event has 82 ancestors and is cut-off event [2022-01-19 07:37:38,729 INFO L387 tUnfolder$Statistics]: existing Event has 82 ancestors and is cut-off event [2022-01-19 07:37:38,946 INFO L129 PetriNetUnfolder]: 2774/10218 cut-off events. [2022-01-19 07:37:38,946 INFO L130 PetriNetUnfolder]: For 21144/21860 co-relation queries the response was YES. [2022-01-19 07:37:39,015 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30427 conditions, 10218 events. 2774/10218 cut-off events. For 21144/21860 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 118300 event pairs, 353 based on Foata normal form. 308/9527 useless extension candidates. Maximal degree in co-relation 30401. Up to 1828 conditions per place. [2022-01-19 07:37:39,021 INFO L132 encePairwiseOnDemand]: 125/129 looper letters, 0 selfloop transitions, 0 changer transitions 234/234 dead transitions. [2022-01-19 07:37:39,021 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 234 transitions, 1758 flow [2022-01-19 07:37:39,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 07:37:39,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 07:37:39,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 352 transitions. [2022-01-19 07:37:39,023 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9095607235142119 [2022-01-19 07:37:39,024 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 352 transitions. [2022-01-19 07:37:39,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 352 transitions. [2022-01-19 07:37:39,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 07:37:39,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 352 transitions. [2022-01-19 07:37:39,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:39,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:39,025 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:39,025 INFO L186 Difference]: Start difference. First operand has 167 places, 215 transitions, 1397 flow. Second operand 3 states and 352 transitions. [2022-01-19 07:37:39,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 234 transitions, 1758 flow [2022-01-19 07:37:39,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 234 transitions, 1699 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-01-19 07:37:39,173 INFO L242 Difference]: Finished difference. Result has 160 places, 0 transitions, 0 flow [2022-01-19 07:37:39,173 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=1336, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=160, PETRI_TRANSITIONS=0} [2022-01-19 07:37:39,173 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 51 predicate places. [2022-01-19 07:37:39,173 INFO L470 AbstractCegarLoop]: Abstraction has has 160 places, 0 transitions, 0 flow [2022-01-19 07:37:39,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 07:37:39,187 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2022-01-19 07:37:39,188 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-19 07:37:39,188 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-19 07:37:39,188 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-19 07:37:39,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-19 07:37:39,193 INFO L732 BasicCegarLoop]: Path program histogram: [9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 07:37:39,194 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-19 07:37:39,194 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-19 07:37:39,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.01 07:37:39 BasicIcfg [2022-01-19 07:37:39,197 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-19 07:37:39,197 INFO L158 Benchmark]: Toolchain (without parser) took 20237.88ms. Allocated memory was 367.0MB in the beginning and 5.8GB in the end (delta: 5.4GB). Free memory was 309.8MB in the beginning and 5.2GB in the end (delta: -4.9GB). Peak memory consumption was 872.5MB. Max. memory is 16.0GB. [2022-01-19 07:37:39,197 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 367.0MB. Free memory is still 326.7MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 07:37:39,198 INFO L158 Benchmark]: CACSL2BoogieTranslator took 334.73ms. Allocated memory is still 367.0MB. Free memory was 309.6MB in the beginning and 335.2MB in the end (delta: -25.6MB). Peak memory consumption was 11.2MB. Max. memory is 16.0GB. [2022-01-19 07:37:39,198 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.76ms. Allocated memory is still 367.0MB. Free memory was 334.1MB in the beginning and 333.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-19 07:37:39,198 INFO L158 Benchmark]: Boogie Preprocessor took 39.34ms. Allocated memory is still 367.0MB. Free memory was 333.0MB in the beginning and 332.0MB in the end (delta: 995.8kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-19 07:37:39,198 INFO L158 Benchmark]: RCFGBuilder took 377.11ms. Allocated memory is still 367.0MB. Free memory was 332.0MB in the beginning and 316.3MB in the end (delta: 15.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2022-01-19 07:37:39,198 INFO L158 Benchmark]: TraceAbstraction took 19439.55ms. Allocated memory was 367.0MB in the beginning and 5.8GB in the end (delta: 5.4GB). Free memory was 315.3MB in the beginning and 5.2GB in the end (delta: -4.9GB). Peak memory consumption was 878.0MB. Max. memory is 16.0GB. [2022-01-19 07:37:39,200 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 367.0MB. Free memory is still 326.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 334.73ms. Allocated memory is still 367.0MB. Free memory was 309.6MB in the beginning and 335.2MB in the end (delta: -25.6MB). Peak memory consumption was 11.2MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 41.76ms. Allocated memory is still 367.0MB. Free memory was 334.1MB in the beginning and 333.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 39.34ms. Allocated memory is still 367.0MB. Free memory was 333.0MB in the beginning and 332.0MB in the end (delta: 995.8kB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 377.11ms. Allocated memory is still 367.0MB. Free memory was 332.0MB in the beginning and 316.3MB in the end (delta: 15.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 19439.55ms. Allocated memory was 367.0MB in the beginning and 5.8GB in the end (delta: 5.4GB). Free memory was 315.3MB in the beginning and 5.2GB in the end (delta: -4.9GB). Peak memory consumption was 878.0MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 127]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 156 locations, 4 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: 19.3s, OverallIterations: 18, TraceHistogramMax: 3, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 11.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 267 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 267 mSDsluCounter, 485 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1153 mSDsCounter, 67 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2157 IncrementalHoareTripleChecker+Invalid, 2224 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 67 mSolverCounterUnsat, 123 mSDtfsCounter, 2157 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1426 GetRequests, 1311 SyntacticMatches, 50 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1428occurred in iteration=15, InterpolantAutomatonStates: 89, 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: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 4.7s InterpolantComputationTime, 2447 NumberOfCodeBlocks, 2412 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 3077 ConstructedInterpolants, 0 QuantifiedInterpolants, 10271 SizeOfPredicates, 12 NumberOfNonLiveVariables, 1449 ConjunctsInSsa, 114 ConjunctsInUnsatCore, 30 InterpolantComputations, 12 PerfectInterpolantSequences, 136/439 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-01-19 07:37:39,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...