./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-wmm/safe017_tso.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-wmm/safe017_tso.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f42e8f5213d7b87505465b65029831bd75698bf771428502e6718d43723a660f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 02:51:13,050 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 02:51:13,052 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 02:51:13,093 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 02:51:13,093 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 02:51:13,096 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 02:51:13,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 02:51:13,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 02:51:13,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 02:51:13,107 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 02:51:13,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 02:51:13,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 02:51:13,111 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 02:51:13,113 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 02:51:13,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 02:51:13,116 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 02:51:13,117 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 02:51:13,117 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 02:51:13,119 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 02:51:13,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 02:51:13,124 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 02:51:13,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 02:51:13,126 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 02:51:13,128 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 02:51:13,133 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 02:51:13,133 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 02:51:13,133 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 02:51:13,134 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 02:51:13,135 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 02:51:13,135 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 02:51:13,136 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 02:51:13,136 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 02:51:13,137 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 02:51:13,138 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 02:51:13,139 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 02:51:13,139 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 02:51:13,140 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 02:51:13,140 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 02:51:13,140 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 02:51:13,141 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 02:51:13,142 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 02:51:13,142 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 02:51:13,169 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 02:51:13,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 02:51:13,170 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 02:51:13,170 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 02:51:13,171 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 02:51:13,171 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 02:51:13,172 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 02:51:13,172 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 02:51:13,172 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 02:51:13,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 02:51:13,173 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 02:51:13,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 02:51:13,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 02:51:13,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 02:51:13,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 02:51:13,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 02:51:13,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 02:51:13,174 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 02:51:13,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 02:51:13,175 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 02:51:13,175 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 02:51:13,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 02:51:13,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 02:51:13,175 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 02:51:13,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:51:13,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 02:51:13,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 02:51:13,176 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 02:51:13,176 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 02:51:13,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 02:51:13,176 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 02:51:13,177 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 02:51:13,177 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 02:51:13,177 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f42e8f5213d7b87505465b65029831bd75698bf771428502e6718d43723a660f [2021-12-28 02:51:13,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 02:51:13,453 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 02:51:13,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 02:51:13,456 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 02:51:13,456 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 02:51:13,457 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-wmm/safe017_tso.i [2021-12-28 02:51:13,510 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbb9073ec/ff9e7aa55337453997ba099be281cc7d/FLAG7070b9b0e [2021-12-28 02:51:13,905 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 02:51:13,906 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe017_tso.i [2021-12-28 02:51:13,916 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbb9073ec/ff9e7aa55337453997ba099be281cc7d/FLAG7070b9b0e [2021-12-28 02:51:13,925 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbb9073ec/ff9e7aa55337453997ba099be281cc7d [2021-12-28 02:51:13,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 02:51:13,929 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 02:51:13,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 02:51:13,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 02:51:13,933 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 02:51:13,934 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:51:13" (1/1) ... [2021-12-28 02:51:13,935 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46bf840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:51:13, skipping insertion in model container [2021-12-28 02:51:13,935 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:51:13" (1/1) ... [2021-12-28 02:51:13,940 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 02:51:13,980 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 02:51:14,123 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe017_tso.i[945,958] [2021-12-28 02:51:14,250 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:51:14,255 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 02:51:14,262 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe017_tso.i[945,958] [2021-12-28 02:51:14,290 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:51:14,317 INFO L208 MainTranslator]: Completed translation [2021-12-28 02:51:14,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:51:14 WrapperNode [2021-12-28 02:51:14,318 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 02:51:14,319 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 02:51:14,319 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 02:51:14,320 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 02:51:14,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:51:14" (1/1) ... [2021-12-28 02:51:14,356 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:51:14" (1/1) ... [2021-12-28 02:51:14,379 INFO L137 Inliner]: procedures = 176, calls = 51, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 69 [2021-12-28 02:51:14,379 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 02:51:14,380 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 02:51:14,380 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 02:51:14,380 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 02:51:14,385 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:51:14" (1/1) ... [2021-12-28 02:51:14,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:51:14" (1/1) ... [2021-12-28 02:51:14,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:51:14" (1/1) ... [2021-12-28 02:51:14,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:51:14" (1/1) ... [2021-12-28 02:51:14,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:51:14" (1/1) ... [2021-12-28 02:51:14,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:51:14" (1/1) ... [2021-12-28 02:51:14,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:51:14" (1/1) ... [2021-12-28 02:51:14,412 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 02:51:14,416 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 02:51:14,417 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 02:51:14,417 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 02:51:14,418 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:51:14" (1/1) ... [2021-12-28 02:51:14,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:51:14,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:51:14,442 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) [2021-12-28 02:51:14,461 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 [2021-12-28 02:51:14,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 02:51:14,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-28 02:51:14,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 02:51:14,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 02:51:14,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 02:51:14,476 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2021-12-28 02:51:14,476 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2021-12-28 02:51:14,476 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2021-12-28 02:51:14,476 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2021-12-28 02:51:14,476 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2021-12-28 02:51:14,477 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2021-12-28 02:51:14,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 02:51:14,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-28 02:51:14,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 02:51:14,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 02:51:14,478 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-28 02:51:14,558 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 02:51:14,560 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 02:51:14,709 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 02:51:14,714 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 02:51:14,714 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-28 02:51:14,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:51:14 BoogieIcfgContainer [2021-12-28 02:51:14,716 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 02:51:14,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 02:51:14,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 02:51:14,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 02:51:14,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 02:51:13" (1/3) ... [2021-12-28 02:51:14,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37fb1b32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:51:14, skipping insertion in model container [2021-12-28 02:51:14,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:51:14" (2/3) ... [2021-12-28 02:51:14,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37fb1b32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:51:14, skipping insertion in model container [2021-12-28 02:51:14,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:51:14" (3/3) ... [2021-12-28 02:51:14,721 INFO L111 eAbstractionObserver]: Analyzing ICFG safe017_tso.i [2021-12-28 02:51:14,724 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-28 02:51:14,724 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 02:51:14,724 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 02:51:14,725 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-28 02:51:14,762 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,763 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,763 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,768 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,769 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,769 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,769 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,769 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,773 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,774 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,774 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,774 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,775 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,775 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,775 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,775 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,775 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,776 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,776 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,776 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,776 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,777 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,778 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,778 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,779 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,779 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,779 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,779 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,780 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,780 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,780 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,780 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,781 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,781 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,781 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,781 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,784 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,784 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,785 WARN L322 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,785 WARN L322 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,786 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,787 WARN L322 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,787 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,787 WARN L322 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,788 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,788 WARN L322 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,789 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,789 WARN L322 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:51:14,790 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-12-28 02:51:14,828 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 02:51:14,833 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=true, 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 [2021-12-28 02:51:14,834 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-28 02:51:14,844 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 97 places, 89 transitions, 193 flow [2021-12-28 02:51:14,885 INFO L129 PetriNetUnfolder]: 2/86 cut-off events. [2021-12-28 02:51:14,886 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-28 02:51:14,888 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 86 events. 2/86 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 67. Up to 2 conditions per place. [2021-12-28 02:51:14,888 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 89 transitions, 193 flow [2021-12-28 02:51:14,892 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 72 transitions, 153 flow [2021-12-28 02:51:14,915 INFO L129 PetriNetUnfolder]: 1/71 cut-off events. [2021-12-28 02:51:14,915 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-28 02:51:14,916 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 02:51:14,916 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] [2021-12-28 02:51:14,924 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 02:51:14,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:51:14,928 INFO L85 PathProgramCache]: Analyzing trace with hash 765436880, now seen corresponding path program 1 times [2021-12-28 02:51:14,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:51:14,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841855157] [2021-12-28 02:51:14,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:51:14,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:51:15,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:51:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:51:15,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:51:15,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841855157] [2021-12-28 02:51:15,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841855157] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:51:15,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:51:15,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:51:15,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633660166] [2021-12-28 02:51:15,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:51:15,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:51:15,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:51:15,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:51:15,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:51:15,349 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 89 [2021-12-28 02:51:15,354 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 72 transitions, 153 flow. Second operand has 7 states, 7 states have (on average 69.71428571428571) internal successors, (488), 7 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:15,354 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 02:51:15,354 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 89 [2021-12-28 02:51:15,356 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 02:51:15,654 INFO L129 PetriNetUnfolder]: 303/715 cut-off events. [2021-12-28 02:51:15,655 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2021-12-28 02:51:15,659 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1266 conditions, 715 events. 303/715 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3701 event pairs, 15 based on Foata normal form. 27/711 useless extension candidates. Maximal degree in co-relation 1231. Up to 135 conditions per place. [2021-12-28 02:51:15,687 INFO L132 encePairwiseOnDemand]: 78/89 looper letters, 22 selfloop transitions, 6 changer transitions 47/129 dead transitions. [2021-12-28 02:51:15,687 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 129 transitions, 417 flow [2021-12-28 02:51:15,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 02:51:15,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-28 02:51:15,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 965 transitions. [2021-12-28 02:51:15,703 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8340535868625756 [2021-12-28 02:51:15,704 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 965 transitions. [2021-12-28 02:51:15,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 965 transitions. [2021-12-28 02:51:15,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 02:51:15,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 965 transitions. [2021-12-28 02:51:15,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 74.23076923076923) internal successors, (965), 13 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:15,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 89.0) internal successors, (1246), 14 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:15,721 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 89.0) internal successors, (1246), 14 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:15,723 INFO L186 Difference]: Start difference. First operand has 81 places, 72 transitions, 153 flow. Second operand 13 states and 965 transitions. [2021-12-28 02:51:15,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 129 transitions, 417 flow [2021-12-28 02:51:15,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 129 transitions, 414 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-12-28 02:51:15,731 INFO L242 Difference]: Finished difference. Result has 102 places, 75 transitions, 234 flow [2021-12-28 02:51:15,732 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=234, PETRI_PLACES=102, PETRI_TRANSITIONS=75} [2021-12-28 02:51:15,735 INFO L334 CegarLoopForPetriNet]: 81 programPoint places, 21 predicate places. [2021-12-28 02:51:15,735 INFO L470 AbstractCegarLoop]: Abstraction has has 102 places, 75 transitions, 234 flow [2021-12-28 02:51:15,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 69.71428571428571) internal successors, (488), 7 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:15,736 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 02:51:15,736 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] [2021-12-28 02:51:15,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 02:51:15,737 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 02:51:15,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:51:15,737 INFO L85 PathProgramCache]: Analyzing trace with hash -109867121, now seen corresponding path program 1 times [2021-12-28 02:51:15,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:51:15,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703458269] [2021-12-28 02:51:15,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:51:15,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:51:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:51:15,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:51:15,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:51:15,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703458269] [2021-12-28 02:51:15,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703458269] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:51:15,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:51:15,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:51:15,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949634119] [2021-12-28 02:51:15,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:51:15,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:51:15,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:51:15,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:51:15,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:51:15,869 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 89 [2021-12-28 02:51:15,870 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 75 transitions, 234 flow. Second operand has 7 states, 7 states have (on average 69.85714285714286) internal successors, (489), 7 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:15,870 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 02:51:15,870 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 89 [2021-12-28 02:51:15,870 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 02:51:16,091 INFO L129 PetriNetUnfolder]: 172/677 cut-off events. [2021-12-28 02:51:16,091 INFO L130 PetriNetUnfolder]: For 1281/1352 co-relation queries the response was YES. [2021-12-28 02:51:16,093 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1898 conditions, 677 events. 172/677 cut-off events. For 1281/1352 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4237 event pairs, 8 based on Foata normal form. 22/684 useless extension candidates. Maximal degree in co-relation 1852. Up to 112 conditions per place. [2021-12-28 02:51:16,096 INFO L132 encePairwiseOnDemand]: 78/89 looper letters, 26 selfloop transitions, 13 changer transitions 52/145 dead transitions. [2021-12-28 02:51:16,096 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 145 transitions, 924 flow [2021-12-28 02:51:16,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 02:51:16,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-28 02:51:16,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 964 transitions. [2021-12-28 02:51:16,098 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8331892826274849 [2021-12-28 02:51:16,098 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 964 transitions. [2021-12-28 02:51:16,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 964 transitions. [2021-12-28 02:51:16,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 02:51:16,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 964 transitions. [2021-12-28 02:51:16,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 74.15384615384616) internal successors, (964), 13 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:16,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 89.0) internal successors, (1246), 14 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:16,103 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 89.0) internal successors, (1246), 14 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:16,103 INFO L186 Difference]: Start difference. First operand has 102 places, 75 transitions, 234 flow. Second operand 13 states and 964 transitions. [2021-12-28 02:51:16,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 145 transitions, 924 flow [2021-12-28 02:51:16,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 145 transitions, 896 flow, removed 12 selfloop flow, removed 4 redundant places. [2021-12-28 02:51:16,109 INFO L242 Difference]: Finished difference. Result has 113 places, 84 transitions, 389 flow [2021-12-28 02:51:16,109 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=389, PETRI_PLACES=113, PETRI_TRANSITIONS=84} [2021-12-28 02:51:16,109 INFO L334 CegarLoopForPetriNet]: 81 programPoint places, 32 predicate places. [2021-12-28 02:51:16,110 INFO L470 AbstractCegarLoop]: Abstraction has has 113 places, 84 transitions, 389 flow [2021-12-28 02:51:16,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 69.85714285714286) internal successors, (489), 7 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:16,110 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 02:51:16,110 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] [2021-12-28 02:51:16,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 02:51:16,111 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 02:51:16,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:51:16,111 INFO L85 PathProgramCache]: Analyzing trace with hash 807853648, now seen corresponding path program 1 times [2021-12-28 02:51:16,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:51:16,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555232356] [2021-12-28 02:51:16,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:51:16,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:51:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:51:16,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:51:16,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:51:16,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555232356] [2021-12-28 02:51:16,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555232356] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:51:16,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:51:16,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:51:16,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174482698] [2021-12-28 02:51:16,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:51:16,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:51:16,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:51:16,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:51:16,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:51:16,205 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 89 [2021-12-28 02:51:16,206 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 84 transitions, 389 flow. Second operand has 7 states, 7 states have (on average 70.0) internal successors, (490), 7 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:16,206 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 02:51:16,206 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 89 [2021-12-28 02:51:16,206 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 02:51:16,378 INFO L129 PetriNetUnfolder]: 98/438 cut-off events. [2021-12-28 02:51:16,379 INFO L130 PetriNetUnfolder]: For 1772/1986 co-relation queries the response was YES. [2021-12-28 02:51:16,380 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1519 conditions, 438 events. 98/438 cut-off events. For 1772/1986 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2284 event pairs, 10 based on Foata normal form. 13/440 useless extension candidates. Maximal degree in co-relation 1461. Up to 79 conditions per place. [2021-12-28 02:51:16,382 INFO L132 encePairwiseOnDemand]: 78/89 looper letters, 27 selfloop transitions, 17 changer transitions 31/129 dead transitions. [2021-12-28 02:51:16,382 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 129 transitions, 964 flow [2021-12-28 02:51:16,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 02:51:16,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-28 02:51:16,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 952 transitions. [2021-12-28 02:51:16,384 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8228176318063959 [2021-12-28 02:51:16,384 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 952 transitions. [2021-12-28 02:51:16,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 952 transitions. [2021-12-28 02:51:16,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 02:51:16,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 952 transitions. [2021-12-28 02:51:16,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 73.23076923076923) internal successors, (952), 13 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:16,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 89.0) internal successors, (1246), 14 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:16,388 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 89.0) internal successors, (1246), 14 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:16,388 INFO L186 Difference]: Start difference. First operand has 113 places, 84 transitions, 389 flow. Second operand 13 states and 952 transitions. [2021-12-28 02:51:16,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 129 transitions, 964 flow [2021-12-28 02:51:16,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 129 transitions, 880 flow, removed 42 selfloop flow, removed 3 redundant places. [2021-12-28 02:51:16,395 INFO L242 Difference]: Finished difference. Result has 124 places, 88 transitions, 489 flow [2021-12-28 02:51:16,395 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=489, PETRI_PLACES=124, PETRI_TRANSITIONS=88} [2021-12-28 02:51:16,396 INFO L334 CegarLoopForPetriNet]: 81 programPoint places, 43 predicate places. [2021-12-28 02:51:16,396 INFO L470 AbstractCegarLoop]: Abstraction has has 124 places, 88 transitions, 489 flow [2021-12-28 02:51:16,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 70.0) internal successors, (490), 7 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:16,396 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 02:51:16,396 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] [2021-12-28 02:51:16,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 02:51:16,397 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 02:51:16,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:51:16,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1602581462, now seen corresponding path program 1 times [2021-12-28 02:51:16,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:51:16,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050479970] [2021-12-28 02:51:16,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:51:16,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:51:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:51:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:51:16,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:51:16,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050479970] [2021-12-28 02:51:16,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050479970] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:51:16,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:51:16,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:51:16,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692968217] [2021-12-28 02:51:16,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:51:16,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:51:16,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:51:16,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:51:16,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:51:16,480 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 89 [2021-12-28 02:51:16,481 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 88 transitions, 489 flow. Second operand has 7 states, 7 states have (on average 70.14285714285714) internal successors, (491), 7 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:16,481 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 02:51:16,481 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 89 [2021-12-28 02:51:16,481 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 02:51:16,655 INFO L129 PetriNetUnfolder]: 71/384 cut-off events. [2021-12-28 02:51:16,655 INFO L130 PetriNetUnfolder]: For 1889/2288 co-relation queries the response was YES. [2021-12-28 02:51:16,657 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1466 conditions, 384 events. 71/384 cut-off events. For 1889/2288 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2031 event pairs, 1 based on Foata normal form. 8/380 useless extension candidates. Maximal degree in co-relation 1410. Up to 65 conditions per place. [2021-12-28 02:51:16,659 INFO L132 encePairwiseOnDemand]: 79/89 looper letters, 30 selfloop transitions, 19 changer transitions 23/126 dead transitions. [2021-12-28 02:51:16,660 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 126 transitions, 1014 flow [2021-12-28 02:51:16,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 02:51:16,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-28 02:51:16,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 942 transitions. [2021-12-28 02:51:16,662 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8141745894554884 [2021-12-28 02:51:16,662 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 942 transitions. [2021-12-28 02:51:16,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 942 transitions. [2021-12-28 02:51:16,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 02:51:16,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 942 transitions. [2021-12-28 02:51:16,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 72.46153846153847) internal successors, (942), 13 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:16,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 89.0) internal successors, (1246), 14 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:16,667 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 89.0) internal successors, (1246), 14 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:16,667 INFO L186 Difference]: Start difference. First operand has 124 places, 88 transitions, 489 flow. Second operand 13 states and 942 transitions. [2021-12-28 02:51:16,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 126 transitions, 1014 flow [2021-12-28 02:51:16,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 126 transitions, 874 flow, removed 57 selfloop flow, removed 16 redundant places. [2021-12-28 02:51:16,678 INFO L242 Difference]: Finished difference. Result has 123 places, 91 transitions, 572 flow [2021-12-28 02:51:16,678 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=572, PETRI_PLACES=123, PETRI_TRANSITIONS=91} [2021-12-28 02:51:16,679 INFO L334 CegarLoopForPetriNet]: 81 programPoint places, 42 predicate places. [2021-12-28 02:51:16,703 INFO L470 AbstractCegarLoop]: Abstraction has has 123 places, 91 transitions, 572 flow [2021-12-28 02:51:16,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 70.14285714285714) internal successors, (491), 7 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:16,704 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 02:51:16,705 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] [2021-12-28 02:51:16,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 02:51:16,705 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 02:51:16,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:51:16,706 INFO L85 PathProgramCache]: Analyzing trace with hash 204671329, now seen corresponding path program 1 times [2021-12-28 02:51:16,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:51:16,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007621467] [2021-12-28 02:51:16,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:51:16,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:51:16,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:51:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:51:16,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:51:16,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007621467] [2021-12-28 02:51:16,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007621467] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:51:16,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:51:16,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:51:16,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957834335] [2021-12-28 02:51:16,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:51:16,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:51:16,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:51:16,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:51:16,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:51:16,829 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 89 [2021-12-28 02:51:16,830 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 91 transitions, 572 flow. Second operand has 8 states, 8 states have (on average 69.875) internal successors, (559), 8 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:16,830 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 02:51:16,830 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 89 [2021-12-28 02:51:16,830 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 02:51:16,941 INFO L129 PetriNetUnfolder]: 72/398 cut-off events. [2021-12-28 02:51:16,941 INFO L130 PetriNetUnfolder]: For 2682/2952 co-relation queries the response was YES. [2021-12-28 02:51:16,942 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1654 conditions, 398 events. 72/398 cut-off events. For 2682/2952 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2163 event pairs, 7 based on Foata normal form. 16/399 useless extension candidates. Maximal degree in co-relation 1587. Up to 79 conditions per place. [2021-12-28 02:51:16,944 INFO L132 encePairwiseOnDemand]: 78/89 looper letters, 23 selfloop transitions, 13 changer transitions 36/126 dead transitions. [2021-12-28 02:51:16,944 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 126 transitions, 1157 flow [2021-12-28 02:51:16,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 02:51:16,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-28 02:51:16,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 594 transitions. [2021-12-28 02:51:16,945 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8342696629213483 [2021-12-28 02:51:16,945 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 594 transitions. [2021-12-28 02:51:16,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 594 transitions. [2021-12-28 02:51:16,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 02:51:16,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 594 transitions. [2021-12-28 02:51:16,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 74.25) internal successors, (594), 8 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:16,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 89.0) internal successors, (801), 9 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:16,948 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 89.0) internal successors, (801), 9 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:16,948 INFO L186 Difference]: Start difference. First operand has 123 places, 91 transitions, 572 flow. Second operand 8 states and 594 transitions. [2021-12-28 02:51:16,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 126 transitions, 1157 flow [2021-12-28 02:51:16,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 126 transitions, 1068 flow, removed 31 selfloop flow, removed 7 redundant places. [2021-12-28 02:51:16,955 INFO L242 Difference]: Finished difference. Result has 118 places, 83 transitions, 471 flow [2021-12-28 02:51:16,955 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=471, PETRI_PLACES=118, PETRI_TRANSITIONS=83} [2021-12-28 02:51:16,956 INFO L334 CegarLoopForPetriNet]: 81 programPoint places, 37 predicate places. [2021-12-28 02:51:16,956 INFO L470 AbstractCegarLoop]: Abstraction has has 118 places, 83 transitions, 471 flow [2021-12-28 02:51:16,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 69.875) internal successors, (559), 8 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:16,956 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 02:51:16,956 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] [2021-12-28 02:51:16,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 02:51:16,957 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 02:51:16,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:51:16,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1449630669, now seen corresponding path program 1 times [2021-12-28 02:51:16,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:51:16,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54290812] [2021-12-28 02:51:16,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:51:16,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:51:16,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:51:17,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:51:17,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:51:17,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54290812] [2021-12-28 02:51:17,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54290812] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:51:17,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:51:17,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:51:17,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758612686] [2021-12-28 02:51:17,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:51:17,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:51:17,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:51:17,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:51:17,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:51:17,054 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 89 [2021-12-28 02:51:17,054 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 83 transitions, 471 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:17,054 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 02:51:17,054 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 89 [2021-12-28 02:51:17,055 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 02:51:17,205 INFO L129 PetriNetUnfolder]: 413/1100 cut-off events. [2021-12-28 02:51:17,205 INFO L130 PetriNetUnfolder]: For 1011/1068 co-relation queries the response was YES. [2021-12-28 02:51:17,210 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2351 conditions, 1100 events. 413/1100 cut-off events. For 1011/1068 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 8071 event pairs, 10 based on Foata normal form. 9/1009 useless extension candidates. Maximal degree in co-relation 2285. Up to 293 conditions per place. [2021-12-28 02:51:17,213 INFO L132 encePairwiseOnDemand]: 79/89 looper letters, 20 selfloop transitions, 15 changer transitions 11/115 dead transitions. [2021-12-28 02:51:17,213 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 115 transitions, 631 flow [2021-12-28 02:51:17,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:51:17,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-28 02:51:17,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 768 transitions. [2021-12-28 02:51:17,215 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8629213483146068 [2021-12-28 02:51:17,215 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 768 transitions. [2021-12-28 02:51:17,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 768 transitions. [2021-12-28 02:51:17,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 02:51:17,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 768 transitions. [2021-12-28 02:51:17,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 76.8) internal successors, (768), 10 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:17,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 89.0) internal successors, (979), 11 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:17,219 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 89.0) internal successors, (979), 11 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:17,219 INFO L186 Difference]: Start difference. First operand has 118 places, 83 transitions, 471 flow. Second operand 10 states and 768 transitions. [2021-12-28 02:51:17,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 115 transitions, 631 flow [2021-12-28 02:51:17,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 115 transitions, 566 flow, removed 12 selfloop flow, removed 12 redundant places. [2021-12-28 02:51:17,224 INFO L242 Difference]: Finished difference. Result has 118 places, 98 transitions, 515 flow [2021-12-28 02:51:17,224 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=515, PETRI_PLACES=118, PETRI_TRANSITIONS=98} [2021-12-28 02:51:17,225 INFO L334 CegarLoopForPetriNet]: 81 programPoint places, 37 predicate places. [2021-12-28 02:51:17,225 INFO L470 AbstractCegarLoop]: Abstraction has has 118 places, 98 transitions, 515 flow [2021-12-28 02:51:17,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:17,225 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 02:51:17,225 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] [2021-12-28 02:51:17,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 02:51:17,226 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 02:51:17,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:51:17,226 INFO L85 PathProgramCache]: Analyzing trace with hash 965022395, now seen corresponding path program 1 times [2021-12-28 02:51:17,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:51:17,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820668601] [2021-12-28 02:51:17,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:51:17,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:51:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:51:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:51:17,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:51:17,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820668601] [2021-12-28 02:51:17,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820668601] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:51:17,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:51:17,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:51:17,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105766321] [2021-12-28 02:51:17,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:51:17,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:51:17,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:51:17,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:51:17,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:51:17,279 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 89 [2021-12-28 02:51:17,295 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 98 transitions, 515 flow. Second operand has 7 states, 7 states have (on average 73.57142857142857) internal successors, (515), 7 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:17,296 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 02:51:17,296 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 89 [2021-12-28 02:51:17,296 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 02:51:17,486 INFO L129 PetriNetUnfolder]: 287/970 cut-off events. [2021-12-28 02:51:17,487 INFO L130 PetriNetUnfolder]: For 1624/1778 co-relation queries the response was YES. [2021-12-28 02:51:17,491 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2976 conditions, 970 events. 287/970 cut-off events. For 1624/1778 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 7685 event pairs, 0 based on Foata normal form. 61/976 useless extension candidates. Maximal degree in co-relation 2913. Up to 215 conditions per place. [2021-12-28 02:51:17,493 INFO L132 encePairwiseOnDemand]: 79/89 looper letters, 23 selfloop transitions, 17 changer transitions 30/136 dead transitions. [2021-12-28 02:51:17,493 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 136 transitions, 829 flow [2021-12-28 02:51:17,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 02:51:17,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-28 02:51:17,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 995 transitions. [2021-12-28 02:51:17,496 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8599827139152982 [2021-12-28 02:51:17,496 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 995 transitions. [2021-12-28 02:51:17,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 995 transitions. [2021-12-28 02:51:17,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 02:51:17,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 995 transitions. [2021-12-28 02:51:17,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 76.53846153846153) internal successors, (995), 13 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:17,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 89.0) internal successors, (1246), 14 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:17,500 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 89.0) internal successors, (1246), 14 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:17,500 INFO L186 Difference]: Start difference. First operand has 118 places, 98 transitions, 515 flow. Second operand 13 states and 995 transitions. [2021-12-28 02:51:17,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 136 transitions, 829 flow [2021-12-28 02:51:17,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 136 transitions, 779 flow, removed 22 selfloop flow, removed 5 redundant places. [2021-12-28 02:51:17,514 INFO L242 Difference]: Finished difference. Result has 132 places, 99 transitions, 545 flow [2021-12-28 02:51:17,515 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=545, PETRI_PLACES=132, PETRI_TRANSITIONS=99} [2021-12-28 02:51:17,515 INFO L334 CegarLoopForPetriNet]: 81 programPoint places, 51 predicate places. [2021-12-28 02:51:17,515 INFO L470 AbstractCegarLoop]: Abstraction has has 132 places, 99 transitions, 545 flow [2021-12-28 02:51:17,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 73.57142857142857) internal successors, (515), 7 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:17,516 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 02:51:17,516 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] [2021-12-28 02:51:17,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 02:51:17,516 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 02:51:17,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:51:17,516 INFO L85 PathProgramCache]: Analyzing trace with hash 377924634, now seen corresponding path program 1 times [2021-12-28 02:51:17,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:51:17,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944484404] [2021-12-28 02:51:17,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:51:17,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:51:17,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:51:17,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:51:17,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:51:17,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944484404] [2021-12-28 02:51:17,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944484404] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:51:17,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:51:17,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:51:17,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059957982] [2021-12-28 02:51:17,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:51:17,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:51:17,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:51:17,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:51:17,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:51:17,581 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 89 [2021-12-28 02:51:17,581 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 99 transitions, 545 flow. Second operand has 8 states, 8 states have (on average 73.5) internal successors, (588), 8 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:17,582 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 02:51:17,582 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 89 [2021-12-28 02:51:17,582 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 02:51:17,772 INFO L129 PetriNetUnfolder]: 92/570 cut-off events. [2021-12-28 02:51:17,773 INFO L130 PetriNetUnfolder]: For 2030/2248 co-relation queries the response was YES. [2021-12-28 02:51:17,775 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2061 conditions, 570 events. 92/570 cut-off events. For 2030/2248 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4477 event pairs, 2 based on Foata normal form. 82/627 useless extension candidates. Maximal degree in co-relation 2034. Up to 151 conditions per place. [2021-12-28 02:51:17,777 INFO L132 encePairwiseOnDemand]: 80/89 looper letters, 14 selfloop transitions, 18 changer transitions 25/118 dead transitions. [2021-12-28 02:51:17,777 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 118 transitions, 783 flow [2021-12-28 02:51:17,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 02:51:17,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-12-28 02:51:17,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1129 transitions. [2021-12-28 02:51:17,779 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8456928838951311 [2021-12-28 02:51:17,779 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1129 transitions. [2021-12-28 02:51:17,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1129 transitions. [2021-12-28 02:51:17,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 02:51:17,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1129 transitions. [2021-12-28 02:51:17,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 75.26666666666667) internal successors, (1129), 15 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:17,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 89.0) internal successors, (1424), 16 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:17,784 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 89.0) internal successors, (1424), 16 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:17,784 INFO L186 Difference]: Start difference. First operand has 132 places, 99 transitions, 545 flow. Second operand 15 states and 1129 transitions. [2021-12-28 02:51:17,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 118 transitions, 783 flow [2021-12-28 02:51:17,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 118 transitions, 736 flow, removed 9 selfloop flow, removed 10 redundant places. [2021-12-28 02:51:17,792 INFO L242 Difference]: Finished difference. Result has 139 places, 88 transitions, 452 flow [2021-12-28 02:51:17,792 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=452, PETRI_PLACES=139, PETRI_TRANSITIONS=88} [2021-12-28 02:51:17,792 INFO L334 CegarLoopForPetriNet]: 81 programPoint places, 58 predicate places. [2021-12-28 02:51:17,793 INFO L470 AbstractCegarLoop]: Abstraction has has 139 places, 88 transitions, 452 flow [2021-12-28 02:51:17,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 73.5) internal successors, (588), 8 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:17,793 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 02:51:17,793 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] [2021-12-28 02:51:17,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 02:51:17,794 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-28 02:51:17,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:51:17,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1772636443, now seen corresponding path program 1 times [2021-12-28 02:51:17,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:51:17,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277585669] [2021-12-28 02:51:17,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:51:17,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:51:17,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:51:17,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:51:17,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:51:17,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277585669] [2021-12-28 02:51:17,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277585669] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:51:17,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:51:17,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:51:17,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873604054] [2021-12-28 02:51:17,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:51:17,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:51:17,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:51:17,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:51:17,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:51:17,868 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 89 [2021-12-28 02:51:17,869 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 88 transitions, 452 flow. Second operand has 8 states, 8 states have (on average 70.125) internal successors, (561), 8 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:17,869 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 02:51:17,869 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 89 [2021-12-28 02:51:17,869 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 02:51:17,947 INFO L129 PetriNetUnfolder]: 38/281 cut-off events. [2021-12-28 02:51:17,947 INFO L130 PetriNetUnfolder]: For 727/767 co-relation queries the response was YES. [2021-12-28 02:51:17,948 INFO L84 FinitePrefix]: Finished finitePrefix Result has 880 conditions, 281 events. 38/281 cut-off events. For 727/767 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1458 event pairs, 0 based on Foata normal form. 1/268 useless extension candidates. Maximal degree in co-relation 851. Up to 67 conditions per place. [2021-12-28 02:51:17,949 INFO L132 encePairwiseOnDemand]: 79/89 looper letters, 0 selfloop transitions, 0 changer transitions 91/91 dead transitions. [2021-12-28 02:51:17,949 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 91 transitions, 527 flow [2021-12-28 02:51:17,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 02:51:17,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-28 02:51:17,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 637 transitions. [2021-12-28 02:51:17,951 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7952559300873908 [2021-12-28 02:51:17,952 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 637 transitions. [2021-12-28 02:51:17,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 637 transitions. [2021-12-28 02:51:17,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 02:51:17,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 637 transitions. [2021-12-28 02:51:17,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 70.77777777777777) internal successors, (637), 9 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:17,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 89.0) internal successors, (890), 10 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:17,957 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 89.0) internal successors, (890), 10 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:17,957 INFO L186 Difference]: Start difference. First operand has 139 places, 88 transitions, 452 flow. Second operand 9 states and 637 transitions. [2021-12-28 02:51:17,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 91 transitions, 527 flow [2021-12-28 02:51:17,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 91 transitions, 383 flow, removed 23 selfloop flow, removed 28 redundant places. [2021-12-28 02:51:17,963 INFO L242 Difference]: Finished difference. Result has 112 places, 0 transitions, 0 flow [2021-12-28 02:51:17,963 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=112, PETRI_TRANSITIONS=0} [2021-12-28 02:51:17,964 INFO L334 CegarLoopForPetriNet]: 81 programPoint places, 31 predicate places. [2021-12-28 02:51:17,964 INFO L470 AbstractCegarLoop]: Abstraction has has 112 places, 0 transitions, 0 flow [2021-12-28 02:51:17,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 70.125) internal successors, (561), 8 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:51:17,966 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2021-12-28 02:51:17,967 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2021-12-28 02:51:17,967 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2021-12-28 02:51:17,967 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2021-12-28 02:51:17,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 02:51:17,971 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:51:17,972 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-12-28 02:51:17,973 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-28 02:51:17,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.12 02:51:17 BasicIcfg [2021-12-28 02:51:17,980 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-28 02:51:17,981 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-28 02:51:17,981 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-28 02:51:17,981 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-28 02:51:17,982 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:51:14" (3/4) ... [2021-12-28 02:51:17,983 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-28 02:51:17,988 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2021-12-28 02:51:17,988 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2021-12-28 02:51:17,988 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2021-12-28 02:51:17,992 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-12-28 02:51:17,992 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-12-28 02:51:17,993 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-28 02:51:17,993 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-28 02:51:18,020 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-28 02:51:18,020 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-28 02:51:18,021 INFO L158 Benchmark]: Toolchain (without parser) took 4091.44ms. Allocated memory was 54.5MB in the beginning and 146.8MB in the end (delta: 92.3MB). Free memory was 36.0MB in the beginning and 100.7MB in the end (delta: -64.7MB). Peak memory consumption was 27.5MB. Max. memory is 16.1GB. [2021-12-28 02:51:18,021 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 44.0MB. Free memory was 26.4MB in the beginning and 26.4MB in the end (delta: 38.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-28 02:51:18,021 INFO L158 Benchmark]: CACSL2BoogieTranslator took 387.66ms. Allocated memory is still 54.5MB. Free memory was 35.9MB in the beginning and 28.4MB in the end (delta: 7.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-28 02:51:18,021 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.16ms. Allocated memory is still 54.5MB. Free memory was 28.2MB in the beginning and 26.2MB in the end (delta: 2.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-28 02:51:18,022 INFO L158 Benchmark]: Boogie Preprocessor took 35.87ms. Allocated memory is still 54.5MB. Free memory was 26.2MB in the beginning and 24.9MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-28 02:51:18,022 INFO L158 Benchmark]: RCFGBuilder took 299.68ms. Allocated memory is still 54.5MB. Free memory was 24.9MB in the beginning and 26.9MB in the end (delta: -2.0MB). Peak memory consumption was 5.1MB. Max. memory is 16.1GB. [2021-12-28 02:51:18,022 INFO L158 Benchmark]: TraceAbstraction took 3263.53ms. Allocated memory was 54.5MB in the beginning and 146.8MB in the end (delta: 92.3MB). Free memory was 26.2MB in the beginning and 103.8MB in the end (delta: -77.6MB). Peak memory consumption was 15.1MB. Max. memory is 16.1GB. [2021-12-28 02:51:18,022 INFO L158 Benchmark]: Witness Printer took 39.11ms. Allocated memory is still 146.8MB. Free memory was 103.8MB in the beginning and 100.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-28 02:51:18,024 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 44.0MB. Free memory was 26.4MB in the beginning and 26.4MB in the end (delta: 38.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 387.66ms. Allocated memory is still 54.5MB. Free memory was 35.9MB in the beginning and 28.4MB in the end (delta: 7.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 60.16ms. Allocated memory is still 54.5MB. Free memory was 28.2MB in the beginning and 26.2MB in the end (delta: 2.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.87ms. Allocated memory is still 54.5MB. Free memory was 26.2MB in the beginning and 24.9MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 299.68ms. Allocated memory is still 54.5MB. Free memory was 24.9MB in the beginning and 26.9MB in the end (delta: -2.0MB). Peak memory consumption was 5.1MB. Max. memory is 16.1GB. * TraceAbstraction took 3263.53ms. Allocated memory was 54.5MB in the beginning and 146.8MB in the end (delta: 92.3MB). Free memory was 26.2MB in the beginning and 103.8MB in the end (delta: -77.6MB). Peak memory consumption was 15.1MB. Max. memory is 16.1GB. * Witness Printer took 39.11ms. Allocated memory is still 146.8MB. Free memory was 103.8MB in the beginning and 100.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * 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: 18]: 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, 111 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: 3.1s, OverallIterations: 9, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 403 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 403 mSDsluCounter, 616 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 613 mSDsCounter, 97 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 578 IncrementalHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 97 mSolverCounterUnsat, 145 mSDtfsCounter, 578 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 129 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=572occurred in iteration=4, InterpolantAutomatonStates: 107, 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: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 526 NumberOfCodeBlocks, 526 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 517 ConstructedInterpolants, 0 QuantifiedInterpolants, 2221 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 0/0 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! [2021-12-28 02:51:18,060 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... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE