./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/unroll-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/weaver/unroll-2.wvr.c -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 5393d9cf3b7cc0865f031a716dd61208c034931418b29464b30da9c6eaf669bf --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 23:19:41,272 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 23:19:41,273 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 23:19:41,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 23:19:41,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 23:19:41,325 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 23:19:41,326 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 23:19:41,328 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 23:19:41,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 23:19:41,332 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 23:19:41,333 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 23:19:41,334 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 23:19:41,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 23:19:41,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 23:19:41,338 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 23:19:41,339 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 23:19:41,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 23:19:41,341 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 23:19:41,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 23:19:41,346 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 23:19:41,348 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 23:19:41,349 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 23:19:41,350 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 23:19:41,351 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 23:19:41,352 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 23:19:41,355 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 23:19:41,355 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 23:19:41,356 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 23:19:41,356 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 23:19:41,357 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 23:19:41,357 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 23:19:41,357 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 23:19:41,358 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 23:19:41,359 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 23:19:41,360 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 23:19:41,360 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 23:19:41,361 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 23:19:41,361 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 23:19:41,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 23:19:41,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 23:19:41,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 23:19:41,363 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 23:19:41,380 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 23:19:41,383 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 23:19:41,383 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 23:19:41,383 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 23:19:41,384 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 23:19:41,384 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 23:19:41,384 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 23:19:41,385 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 23:19:41,385 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 23:19:41,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 23:19:41,385 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 23:19:41,386 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 23:19:41,386 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 23:19:41,386 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 23:19:41,386 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 23:19:41,386 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 23:19:41,386 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 23:19:41,386 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 23:19:41,386 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 23:19:41,387 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 23:19:41,387 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 23:19:41,387 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 23:19:41,387 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 23:19:41,387 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 23:19:41,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 23:19:41,387 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 23:19:41,388 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 23:19:41,388 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 23:19:41,389 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 23:19:41,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 23:19:41,389 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 23:19:41,389 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 23:19:41,389 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 23:19:41,389 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 23:19:41,390 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5393d9cf3b7cc0865f031a716dd61208c034931418b29464b30da9c6eaf669bf [2021-12-17 23:19:41,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 23:19:41,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 23:19:41,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 23:19:41,604 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 23:19:41,604 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 23:19:41,605 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-2.wvr.c [2021-12-17 23:19:41,643 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2690ade93/942728d329b24c4a8cefe1c913cbd413/FLAG6400575d4 [2021-12-17 23:19:41,996 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 23:19:41,996 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-2.wvr.c [2021-12-17 23:19:42,000 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2690ade93/942728d329b24c4a8cefe1c913cbd413/FLAG6400575d4 [2021-12-17 23:19:42,011 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2690ade93/942728d329b24c4a8cefe1c913cbd413 [2021-12-17 23:19:42,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 23:19:42,014 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 23:19:42,015 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 23:19:42,015 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 23:19:42,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 23:19:42,017 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:19:42" (1/1) ... [2021-12-17 23:19:42,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@726cc9ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:19:42, skipping insertion in model container [2021-12-17 23:19:42,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:19:42" (1/1) ... [2021-12-17 23:19:42,025 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 23:19:42,036 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 23:19:42,189 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/weaver/unroll-2.wvr.c[2428,2441] [2021-12-17 23:19:42,196 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 23:19:42,210 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 23:19:42,222 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/weaver/unroll-2.wvr.c[2428,2441] [2021-12-17 23:19:42,230 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 23:19:42,240 INFO L208 MainTranslator]: Completed translation [2021-12-17 23:19:42,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:19:42 WrapperNode [2021-12-17 23:19:42,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 23:19:42,241 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 23:19:42,241 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 23:19:42,241 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 23:19:42,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:19:42" (1/1) ... [2021-12-17 23:19:42,259 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:19:42" (1/1) ... [2021-12-17 23:19:42,282 INFO L137 Inliner]: procedures = 24, calls = 32, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 134 [2021-12-17 23:19:42,282 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 23:19:42,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 23:19:42,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 23:19:42,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 23:19:42,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:19:42" (1/1) ... [2021-12-17 23:19:42,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:19:42" (1/1) ... [2021-12-17 23:19:42,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:19:42" (1/1) ... [2021-12-17 23:19:42,298 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:19:42" (1/1) ... [2021-12-17 23:19:42,309 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:19:42" (1/1) ... [2021-12-17 23:19:42,313 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:19:42" (1/1) ... [2021-12-17 23:19:42,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:19:42" (1/1) ... [2021-12-17 23:19:42,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 23:19:42,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 23:19:42,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 23:19:42,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 23:19:42,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:19:42" (1/1) ... [2021-12-17 23:19:42,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 23:19:42,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:19:42,343 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) [2021-12-17 23:19:42,345 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 [2021-12-17 23:19:42,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 23:19:42,369 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-17 23:19:42,369 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-17 23:19:42,369 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-17 23:19:42,370 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-17 23:19:42,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 23:19:42,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 23:19:42,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 23:19:42,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 23:19:42,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 23:19:42,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 23:19:42,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 23:19:42,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 23:19:42,374 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-17 23:19:42,445 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 23:19:42,446 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 23:19:42,621 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 23:19:42,627 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 23:19:42,627 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-17 23:19:42,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:19:42 BoogieIcfgContainer [2021-12-17 23:19:42,628 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 23:19:42,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 23:19:42,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 23:19:42,632 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 23:19:42,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 11:19:42" (1/3) ... [2021-12-17 23:19:42,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@115f912c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:19:42, skipping insertion in model container [2021-12-17 23:19:42,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:19:42" (2/3) ... [2021-12-17 23:19:42,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@115f912c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:19:42, skipping insertion in model container [2021-12-17 23:19:42,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:19:42" (3/3) ... [2021-12-17 23:19:42,634 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.c [2021-12-17 23:19:42,637 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-17 23:19:42,637 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 23:19:42,637 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 23:19:42,637 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-17 23:19:42,655 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,656 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,656 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,657 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,657 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,657 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,657 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,657 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,657 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,658 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,658 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,658 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,658 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,658 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,658 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,659 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,659 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,659 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,659 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,659 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,659 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,659 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,660 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,660 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,660 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,660 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,660 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,662 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,663 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,663 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,663 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,663 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,663 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,663 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,663 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,664 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,664 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,664 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,664 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,664 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,665 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,665 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,665 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,665 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,665 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,665 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,666 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,666 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,666 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,666 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,666 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,666 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,667 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,667 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,667 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,667 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,667 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,667 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,668 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,668 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,668 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,668 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,668 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,668 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,668 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,669 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,669 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,669 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,669 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,669 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,669 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,669 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,670 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,670 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,670 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,670 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,670 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,670 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,671 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,671 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,671 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,671 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,671 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,671 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,671 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,672 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,672 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,672 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,672 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,672 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,672 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,673 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,673 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,673 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,673 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,673 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,673 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,673 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,674 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,674 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,674 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,674 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,674 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,674 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,676 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,677 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,677 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,677 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,677 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,677 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,678 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,680 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,680 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,680 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,680 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,680 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,681 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,681 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,681 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,681 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:19:42,683 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-17 23:19:42,718 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 23:19:42,722 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 [2021-12-17 23:19:42,723 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-17 23:19:42,731 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 164 places, 171 transitions, 358 flow [2021-12-17 23:19:42,776 INFO L129 PetriNetUnfolder]: 14/169 cut-off events. [2021-12-17 23:19:42,777 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-17 23:19:42,780 INFO L84 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 169 events. 14/169 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 156 event pairs, 0 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 110. Up to 2 conditions per place. [2021-12-17 23:19:42,780 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 171 transitions, 358 flow [2021-12-17 23:19:42,784 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 160 transitions, 332 flow [2021-12-17 23:19:42,811 INFO L129 PetriNetUnfolder]: 13/156 cut-off events. [2021-12-17 23:19:42,816 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-17 23:19:42,817 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:42,817 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:19:42,818 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:42,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:42,824 INFO L85 PathProgramCache]: Analyzing trace with hash -925266834, now seen corresponding path program 1 times [2021-12-17 23:19:42,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:42,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669443282] [2021-12-17 23:19:42,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:42,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:43,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:19:43,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:43,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669443282] [2021-12-17 23:19:43,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669443282] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:43,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:43,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 23:19:43,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427947929] [2021-12-17 23:19:43,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:43,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 23:19:43,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:43,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 23:19:43,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 23:19:43,226 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 171 [2021-12-17 23:19:43,231 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 160 transitions, 332 flow. Second operand has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 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) [2021-12-17 23:19:43,231 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:43,231 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 171 [2021-12-17 23:19:43,232 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:43,365 INFO L129 PetriNetUnfolder]: 16/249 cut-off events. [2021-12-17 23:19:43,366 INFO L130 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2021-12-17 23:19:43,367 INFO L84 FinitePrefix]: Finished finitePrefix Result has 333 conditions, 249 events. 16/249 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 547 event pairs, 5 based on Foata normal form. 26/253 useless extension candidates. Maximal degree in co-relation 160. Up to 53 conditions per place. [2021-12-17 23:19:43,369 INFO L132 encePairwiseOnDemand]: 152/171 looper letters, 36 selfloop transitions, 7 changer transitions 5/153 dead transitions. [2021-12-17 23:19:43,370 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 153 transitions, 414 flow [2021-12-17 23:19:43,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 23:19:43,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-17 23:19:43,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 981 transitions. [2021-12-17 23:19:43,387 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7171052631578947 [2021-12-17 23:19:43,387 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 981 transitions. [2021-12-17 23:19:43,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 981 transitions. [2021-12-17 23:19:43,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:43,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 981 transitions. [2021-12-17 23:19:43,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 122.625) internal successors, (981), 8 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:43,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 171.0) internal successors, (1539), 9 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:43,400 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 171.0) internal successors, (1539), 9 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:43,402 INFO L186 Difference]: Start difference. First operand has 153 places, 160 transitions, 332 flow. Second operand 8 states and 981 transitions. [2021-12-17 23:19:43,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 153 transitions, 414 flow [2021-12-17 23:19:43,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 153 transitions, 406 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-17 23:19:43,407 INFO L242 Difference]: Finished difference. Result has 157 places, 145 transitions, 314 flow [2021-12-17 23:19:43,408 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=314, PETRI_PLACES=157, PETRI_TRANSITIONS=145} [2021-12-17 23:19:43,410 INFO L334 CegarLoopForPetriNet]: 153 programPoint places, 4 predicate places. [2021-12-17 23:19:43,411 INFO L470 AbstractCegarLoop]: Abstraction has has 157 places, 145 transitions, 314 flow [2021-12-17 23:19:43,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 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) [2021-12-17 23:19:43,411 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:43,412 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:19:43,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 23:19:43,412 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:43,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:43,413 INFO L85 PathProgramCache]: Analyzing trace with hash 354646178, now seen corresponding path program 1 times [2021-12-17 23:19:43,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:43,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926731337] [2021-12-17 23:19:43,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:43,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:43,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:43,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:19:43,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:43,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926731337] [2021-12-17 23:19:43,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926731337] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:43,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:43,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 23:19:43,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7589755] [2021-12-17 23:19:43,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:43,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 23:19:43,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:43,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 23:19:43,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 23:19:43,538 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 171 [2021-12-17 23:19:43,539 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 145 transitions, 314 flow. Second operand has 6 states, 6 states have (on average 123.33333333333333) internal successors, (740), 6 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:43,539 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:43,539 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 171 [2021-12-17 23:19:43,539 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:43,679 INFO L129 PetriNetUnfolder]: 73/531 cut-off events. [2021-12-17 23:19:43,680 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2021-12-17 23:19:43,683 INFO L84 FinitePrefix]: Finished finitePrefix Result has 726 conditions, 531 events. 73/531 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2556 event pairs, 20 based on Foata normal form. 1/491 useless extension candidates. Maximal degree in co-relation 643. Up to 79 conditions per place. [2021-12-17 23:19:43,684 INFO L132 encePairwiseOnDemand]: 164/171 looper letters, 53 selfloop transitions, 5 changer transitions 4/172 dead transitions. [2021-12-17 23:19:43,685 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 172 transitions, 497 flow [2021-12-17 23:19:43,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 23:19:43,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-17 23:19:43,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 777 transitions. [2021-12-17 23:19:43,691 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7573099415204678 [2021-12-17 23:19:43,691 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 777 transitions. [2021-12-17 23:19:43,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 777 transitions. [2021-12-17 23:19:43,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:43,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 777 transitions. [2021-12-17 23:19:43,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 129.5) internal successors, (777), 6 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:43,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:43,695 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:43,695 INFO L186 Difference]: Start difference. First operand has 157 places, 145 transitions, 314 flow. Second operand 6 states and 777 transitions. [2021-12-17 23:19:43,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 172 transitions, 497 flow [2021-12-17 23:19:43,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 172 transitions, 485 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-12-17 23:19:43,702 INFO L242 Difference]: Finished difference. Result has 154 places, 148 transitions, 331 flow [2021-12-17 23:19:43,703 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=331, PETRI_PLACES=154, PETRI_TRANSITIONS=148} [2021-12-17 23:19:43,703 INFO L334 CegarLoopForPetriNet]: 153 programPoint places, 1 predicate places. [2021-12-17 23:19:43,704 INFO L470 AbstractCegarLoop]: Abstraction has has 154 places, 148 transitions, 331 flow [2021-12-17 23:19:43,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 123.33333333333333) internal successors, (740), 6 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:43,704 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:43,705 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:19:43,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 23:19:43,705 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:43,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:43,706 INFO L85 PathProgramCache]: Analyzing trace with hash -447429529, now seen corresponding path program 1 times [2021-12-17 23:19:43,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:43,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556367821] [2021-12-17 23:19:43,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:43,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:43,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:43,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:19:43,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:43,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556367821] [2021-12-17 23:19:43,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556367821] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:19:43,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265329559] [2021-12-17 23:19:43,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:43,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:19:43,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:19:43,852 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:19:43,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 23:19:43,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:43,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 23:19:43,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:19:44,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:19:44,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:19:44,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:19:44,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265329559] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 23:19:44,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:19:44,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2021-12-17 23:19:44,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236052] [2021-12-17 23:19:44,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:44,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 23:19:44,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:44,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 23:19:44,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-17 23:19:44,268 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 171 [2021-12-17 23:19:44,269 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 148 transitions, 331 flow. Second operand has 4 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:44,269 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:44,269 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 171 [2021-12-17 23:19:44,269 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:44,357 INFO L129 PetriNetUnfolder]: 81/584 cut-off events. [2021-12-17 23:19:44,358 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2021-12-17 23:19:44,359 INFO L84 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 584 events. 81/584 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2903 event pairs, 8 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 772. Up to 79 conditions per place. [2021-12-17 23:19:44,360 INFO L132 encePairwiseOnDemand]: 166/171 looper letters, 22 selfloop transitions, 5 changer transitions 1/160 dead transitions. [2021-12-17 23:19:44,361 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 160 transitions, 415 flow [2021-12-17 23:19:44,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 23:19:44,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-17 23:19:44,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 601 transitions. [2021-12-17 23:19:44,362 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8786549707602339 [2021-12-17 23:19:44,362 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 601 transitions. [2021-12-17 23:19:44,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 601 transitions. [2021-12-17 23:19:44,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:44,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 601 transitions. [2021-12-17 23:19:44,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:44,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:44,366 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:44,366 INFO L186 Difference]: Start difference. First operand has 154 places, 148 transitions, 331 flow. Second operand 4 states and 601 transitions. [2021-12-17 23:19:44,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 160 transitions, 415 flow [2021-12-17 23:19:44,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 160 transitions, 411 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-12-17 23:19:44,369 INFO L242 Difference]: Finished difference. Result has 156 places, 152 transitions, 363 flow [2021-12-17 23:19:44,369 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=363, PETRI_PLACES=156, PETRI_TRANSITIONS=152} [2021-12-17 23:19:44,370 INFO L334 CegarLoopForPetriNet]: 153 programPoint places, 3 predicate places. [2021-12-17 23:19:44,370 INFO L470 AbstractCegarLoop]: Abstraction has has 156 places, 152 transitions, 363 flow [2021-12-17 23:19:44,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:44,371 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:44,371 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:19:44,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 23:19:44,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:19:44,596 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:44,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:44,596 INFO L85 PathProgramCache]: Analyzing trace with hash 742379351, now seen corresponding path program 2 times [2021-12-17 23:19:44,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:44,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960425863] [2021-12-17 23:19:44,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:44,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:44,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:44,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:19:44,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:44,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960425863] [2021-12-17 23:19:44,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960425863] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:44,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:44,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 23:19:44,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410037408] [2021-12-17 23:19:44,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:44,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 23:19:44,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:44,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 23:19:44,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 23:19:44,664 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 171 [2021-12-17 23:19:44,665 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 152 transitions, 363 flow. Second operand has 5 states, 5 states have (on average 142.8) internal successors, (714), 5 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:44,665 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:44,665 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 171 [2021-12-17 23:19:44,666 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:44,771 INFO L129 PetriNetUnfolder]: 131/775 cut-off events. [2021-12-17 23:19:44,771 INFO L130 PetriNetUnfolder]: For 183/191 co-relation queries the response was YES. [2021-12-17 23:19:44,773 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1242 conditions, 775 events. 131/775 cut-off events. For 183/191 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4367 event pairs, 26 based on Foata normal form. 9/737 useless extension candidates. Maximal degree in co-relation 1161. Up to 123 conditions per place. [2021-12-17 23:19:44,775 INFO L132 encePairwiseOnDemand]: 163/171 looper letters, 49 selfloop transitions, 11 changer transitions 5/194 dead transitions. [2021-12-17 23:19:44,775 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 194 transitions, 641 flow [2021-12-17 23:19:44,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 23:19:44,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-17 23:19:44,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 899 transitions. [2021-12-17 23:19:44,777 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8762183235867447 [2021-12-17 23:19:44,777 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 899 transitions. [2021-12-17 23:19:44,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 899 transitions. [2021-12-17 23:19:44,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:44,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 899 transitions. [2021-12-17 23:19:44,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 149.83333333333334) internal successors, (899), 6 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:44,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:44,781 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:44,782 INFO L186 Difference]: Start difference. First operand has 156 places, 152 transitions, 363 flow. Second operand 6 states and 899 transitions. [2021-12-17 23:19:44,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 194 transitions, 641 flow [2021-12-17 23:19:44,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 194 transitions, 641 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 23:19:44,785 INFO L242 Difference]: Finished difference. Result has 165 places, 162 transitions, 463 flow [2021-12-17 23:19:44,785 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=463, PETRI_PLACES=165, PETRI_TRANSITIONS=162} [2021-12-17 23:19:44,786 INFO L334 CegarLoopForPetriNet]: 153 programPoint places, 12 predicate places. [2021-12-17 23:19:44,786 INFO L470 AbstractCegarLoop]: Abstraction has has 165 places, 162 transitions, 463 flow [2021-12-17 23:19:44,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 142.8) internal successors, (714), 5 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:44,787 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:44,787 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:19:44,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 23:19:44,787 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:44,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:44,787 INFO L85 PathProgramCache]: Analyzing trace with hash -976886169, now seen corresponding path program 3 times [2021-12-17 23:19:44,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:44,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501651085] [2021-12-17 23:19:44,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:44,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:44,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:19:44,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:44,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501651085] [2021-12-17 23:19:44,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501651085] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:19:44,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116427486] [2021-12-17 23:19:44,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 23:19:44,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:19:44,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:19:44,888 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:19:44,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 23:19:44,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-17 23:19:44,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:19:44,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 23:19:44,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:19:45,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:19:45,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:19:45,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:19:45,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116427486] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:19:45,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:19:45,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2021-12-17 23:19:45,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368173299] [2021-12-17 23:19:45,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:19:45,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 23:19:45,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:45,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 23:19:45,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-12-17 23:19:45,319 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 171 [2021-12-17 23:19:45,320 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 162 transitions, 463 flow. Second operand has 9 states, 9 states have (on average 142.66666666666666) internal successors, (1284), 9 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:45,320 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:45,320 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 171 [2021-12-17 23:19:45,320 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:45,469 INFO L129 PetriNetUnfolder]: 145/925 cut-off events. [2021-12-17 23:19:45,469 INFO L130 PetriNetUnfolder]: For 600/600 co-relation queries the response was YES. [2021-12-17 23:19:45,471 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1714 conditions, 925 events. 145/925 cut-off events. For 600/600 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 5363 event pairs, 43 based on Foata normal form. 11/880 useless extension candidates. Maximal degree in co-relation 1628. Up to 144 conditions per place. [2021-12-17 23:19:45,474 INFO L132 encePairwiseOnDemand]: 163/171 looper letters, 49 selfloop transitions, 19 changer transitions 6/203 dead transitions. [2021-12-17 23:19:45,474 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 203 transitions, 805 flow [2021-12-17 23:19:45,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 23:19:45,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-17 23:19:45,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1039 transitions. [2021-12-17 23:19:45,476 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8680033416875522 [2021-12-17 23:19:45,476 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1039 transitions. [2021-12-17 23:19:45,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1039 transitions. [2021-12-17 23:19:45,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:45,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1039 transitions. [2021-12-17 23:19:45,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 148.42857142857142) internal successors, (1039), 7 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:45,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:45,481 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:45,481 INFO L186 Difference]: Start difference. First operand has 165 places, 162 transitions, 463 flow. Second operand 7 states and 1039 transitions. [2021-12-17 23:19:45,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 203 transitions, 805 flow [2021-12-17 23:19:45,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 203 transitions, 805 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 23:19:45,501 INFO L242 Difference]: Finished difference. Result has 175 places, 171 transitions, 618 flow [2021-12-17 23:19:45,501 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=618, PETRI_PLACES=175, PETRI_TRANSITIONS=171} [2021-12-17 23:19:45,502 INFO L334 CegarLoopForPetriNet]: 153 programPoint places, 22 predicate places. [2021-12-17 23:19:45,502 INFO L470 AbstractCegarLoop]: Abstraction has has 175 places, 171 transitions, 618 flow [2021-12-17 23:19:45,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 142.66666666666666) internal successors, (1284), 9 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:45,503 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:45,503 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:19:45,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-17 23:19:45,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:19:45,735 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:45,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:45,736 INFO L85 PathProgramCache]: Analyzing trace with hash 42209695, now seen corresponding path program 4 times [2021-12-17 23:19:45,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:45,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110866875] [2021-12-17 23:19:45,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:45,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:45,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:19:45,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:45,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110866875] [2021-12-17 23:19:45,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110866875] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:45,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:45,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 23:19:45,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640892278] [2021-12-17 23:19:45,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:45,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 23:19:45,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:45,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 23:19:45,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 23:19:45,789 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 171 [2021-12-17 23:19:45,789 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 171 transitions, 618 flow. Second operand has 5 states, 5 states have (on average 142.8) internal successors, (714), 5 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:45,789 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:45,789 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 171 [2021-12-17 23:19:45,790 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:45,906 INFO L129 PetriNetUnfolder]: 144/876 cut-off events. [2021-12-17 23:19:45,907 INFO L130 PetriNetUnfolder]: For 1298/1298 co-relation queries the response was YES. [2021-12-17 23:19:45,908 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1876 conditions, 876 events. 144/876 cut-off events. For 1298/1298 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4891 event pairs, 59 based on Foata normal form. 2/823 useless extension candidates. Maximal degree in co-relation 1786. Up to 187 conditions per place. [2021-12-17 23:19:45,911 INFO L132 encePairwiseOnDemand]: 164/171 looper letters, 38 selfloop transitions, 10 changer transitions 9/186 dead transitions. [2021-12-17 23:19:45,911 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 186 transitions, 807 flow [2021-12-17 23:19:45,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 23:19:45,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-17 23:19:45,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 878 transitions. [2021-12-17 23:19:45,913 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8557504873294347 [2021-12-17 23:19:45,913 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 878 transitions. [2021-12-17 23:19:45,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 878 transitions. [2021-12-17 23:19:45,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:45,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 878 transitions. [2021-12-17 23:19:45,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 146.33333333333334) internal successors, (878), 6 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:45,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:45,916 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:45,916 INFO L186 Difference]: Start difference. First operand has 175 places, 171 transitions, 618 flow. Second operand 6 states and 878 transitions. [2021-12-17 23:19:45,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 186 transitions, 807 flow [2021-12-17 23:19:45,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 186 transitions, 791 flow, removed 8 selfloop flow, removed 0 redundant places. [2021-12-17 23:19:45,921 INFO L242 Difference]: Finished difference. Result has 183 places, 171 transitions, 638 flow [2021-12-17 23:19:45,921 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=638, PETRI_PLACES=183, PETRI_TRANSITIONS=171} [2021-12-17 23:19:45,922 INFO L334 CegarLoopForPetriNet]: 153 programPoint places, 30 predicate places. [2021-12-17 23:19:45,922 INFO L470 AbstractCegarLoop]: Abstraction has has 183 places, 171 transitions, 638 flow [2021-12-17 23:19:45,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 142.8) internal successors, (714), 5 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:45,923 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:45,923 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:19:45,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 23:19:45,923 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:45,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:45,923 INFO L85 PathProgramCache]: Analyzing trace with hash -142132124, now seen corresponding path program 1 times [2021-12-17 23:19:45,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:45,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111255317] [2021-12-17 23:19:45,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:45,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:46,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:19:46,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:46,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111255317] [2021-12-17 23:19:46,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111255317] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:19:46,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471339814] [2021-12-17 23:19:46,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:46,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:19:46,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:19:46,074 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:19:46,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 23:19:46,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:46,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 23:19:46,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:19:46,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:19:46,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:19:46,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471339814] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:46,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:19:46,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2021-12-17 23:19:46,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727044666] [2021-12-17 23:19:46,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:46,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 23:19:46,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:46,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 23:19:46,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-12-17 23:19:46,307 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 171 [2021-12-17 23:19:46,307 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 171 transitions, 638 flow. Second operand has 5 states, 5 states have (on average 143.2) internal successors, (716), 5 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:46,307 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:46,307 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 171 [2021-12-17 23:19:46,307 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:46,458 INFO L129 PetriNetUnfolder]: 167/1042 cut-off events. [2021-12-17 23:19:46,459 INFO L130 PetriNetUnfolder]: For 1570/1570 co-relation queries the response was YES. [2021-12-17 23:19:46,461 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2199 conditions, 1042 events. 167/1042 cut-off events. For 1570/1570 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 6325 event pairs, 44 based on Foata normal form. 6/984 useless extension candidates. Maximal degree in co-relation 2103. Up to 175 conditions per place. [2021-12-17 23:19:46,464 INFO L132 encePairwiseOnDemand]: 164/171 looper letters, 46 selfloop transitions, 18 changer transitions 5/198 dead transitions. [2021-12-17 23:19:46,465 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 198 transitions, 922 flow [2021-12-17 23:19:46,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 23:19:46,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-17 23:19:46,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1034 transitions. [2021-12-17 23:19:46,467 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8638262322472848 [2021-12-17 23:19:46,467 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1034 transitions. [2021-12-17 23:19:46,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1034 transitions. [2021-12-17 23:19:46,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:46,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1034 transitions. [2021-12-17 23:19:46,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 147.71428571428572) internal successors, (1034), 7 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:46,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:46,471 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:46,471 INFO L186 Difference]: Start difference. First operand has 183 places, 171 transitions, 638 flow. Second operand 7 states and 1034 transitions. [2021-12-17 23:19:46,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 198 transitions, 922 flow [2021-12-17 23:19:46,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 198 transitions, 888 flow, removed 6 selfloop flow, removed 5 redundant places. [2021-12-17 23:19:46,476 INFO L242 Difference]: Finished difference. Result has 185 places, 175 transitions, 703 flow [2021-12-17 23:19:46,476 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=703, PETRI_PLACES=185, PETRI_TRANSITIONS=175} [2021-12-17 23:19:46,477 INFO L334 CegarLoopForPetriNet]: 153 programPoint places, 32 predicate places. [2021-12-17 23:19:46,477 INFO L470 AbstractCegarLoop]: Abstraction has has 185 places, 175 transitions, 703 flow [2021-12-17 23:19:46,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.2) internal successors, (716), 5 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:46,478 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:46,478 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:19:46,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 23:19:46,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:19:46,694 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:46,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:46,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1600569268, now seen corresponding path program 2 times [2021-12-17 23:19:46,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:46,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99163070] [2021-12-17 23:19:46,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:46,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:46,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:46,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:19:46,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:46,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99163070] [2021-12-17 23:19:46,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99163070] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:19:46,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:19:46,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 23:19:46,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63025659] [2021-12-17 23:19:46,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:19:46,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 23:19:46,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:46,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 23:19:46,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-17 23:19:46,768 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 171 [2021-12-17 23:19:46,768 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 175 transitions, 703 flow. Second operand has 6 states, 6 states have (on average 142.66666666666666) internal successors, (856), 6 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:46,769 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:46,769 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 171 [2021-12-17 23:19:46,769 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:46,899 INFO L129 PetriNetUnfolder]: 159/990 cut-off events. [2021-12-17 23:19:46,899 INFO L130 PetriNetUnfolder]: For 1721/1721 co-relation queries the response was YES. [2021-12-17 23:19:46,902 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2144 conditions, 990 events. 159/990 cut-off events. For 1721/1721 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 5630 event pairs, 37 based on Foata normal form. 8/937 useless extension candidates. Maximal degree in co-relation 2049. Up to 168 conditions per place. [2021-12-17 23:19:46,905 INFO L132 encePairwiseOnDemand]: 164/171 looper letters, 49 selfloop transitions, 19 changer transitions 4/201 dead transitions. [2021-12-17 23:19:46,905 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 201 transitions, 994 flow [2021-12-17 23:19:46,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 23:19:46,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-17 23:19:46,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 893 transitions. [2021-12-17 23:19:46,907 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8703703703703703 [2021-12-17 23:19:46,907 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 893 transitions. [2021-12-17 23:19:46,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 893 transitions. [2021-12-17 23:19:46,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:46,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 893 transitions. [2021-12-17 23:19:46,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 148.83333333333334) internal successors, (893), 6 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:46,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:46,912 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:46,912 INFO L186 Difference]: Start difference. First operand has 185 places, 175 transitions, 703 flow. Second operand 6 states and 893 transitions. [2021-12-17 23:19:46,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 201 transitions, 994 flow [2021-12-17 23:19:46,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 201 transitions, 949 flow, removed 10 selfloop flow, removed 2 redundant places. [2021-12-17 23:19:46,918 INFO L242 Difference]: Finished difference. Result has 190 places, 175 transitions, 724 flow [2021-12-17 23:19:46,918 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=724, PETRI_PLACES=190, PETRI_TRANSITIONS=175} [2021-12-17 23:19:46,921 INFO L334 CegarLoopForPetriNet]: 153 programPoint places, 37 predicate places. [2021-12-17 23:19:46,921 INFO L470 AbstractCegarLoop]: Abstraction has has 190 places, 175 transitions, 724 flow [2021-12-17 23:19:46,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 142.66666666666666) internal successors, (856), 6 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:46,921 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:46,921 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:19:46,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 23:19:46,922 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:46,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:46,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1340803277, now seen corresponding path program 1 times [2021-12-17 23:19:46,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:46,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758653386] [2021-12-17 23:19:46,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:46,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:46,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:47,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:19:47,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:47,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758653386] [2021-12-17 23:19:47,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758653386] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:19:47,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884307718] [2021-12-17 23:19:47,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:47,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:19:47,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:19:47,029 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:19:47,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 23:19:47,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:47,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-17 23:19:47,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:19:47,680 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-12-17 23:19:47,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2021-12-17 23:19:47,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:19:47,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:19:48,113 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-17 23:19:48,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2021-12-17 23:19:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:19:48,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884307718] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:19:48,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:19:48,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 18, 18] total 33 [2021-12-17 23:19:48,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702963251] [2021-12-17 23:19:48,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:19:48,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-17 23:19:48,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:19:48,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-17 23:19:48,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-12-17 23:19:48,815 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 171 [2021-12-17 23:19:48,816 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 175 transitions, 724 flow. Second operand has 33 states, 33 states have (on average 83.84848484848484) internal successors, (2767), 33 states have internal predecessors, (2767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:48,817 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:19:48,817 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 171 [2021-12-17 23:19:48,817 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:19:54,999 INFO L129 PetriNetUnfolder]: 6017/12957 cut-off events. [2021-12-17 23:19:55,000 INFO L130 PetriNetUnfolder]: For 17602/17844 co-relation queries the response was YES. [2021-12-17 23:19:55,031 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31940 conditions, 12957 events. 6017/12957 cut-off events. For 17602/17844 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 114037 event pairs, 192 based on Foata normal form. 418/12701 useless extension candidates. Maximal degree in co-relation 25199. Up to 2035 conditions per place. [2021-12-17 23:19:55,069 INFO L132 encePairwiseOnDemand]: 135/171 looper letters, 619 selfloop transitions, 224 changer transitions 187/1105 dead transitions. [2021-12-17 23:19:55,069 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 1105 transitions, 6103 flow [2021-12-17 23:19:55,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-12-17 23:19:55,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2021-12-17 23:19:55,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 10262 transitions. [2021-12-17 23:19:55,085 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5042999656002752 [2021-12-17 23:19:55,086 INFO L72 ComplementDD]: Start complementDD. Operand 119 states and 10262 transitions. [2021-12-17 23:19:55,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 119 states and 10262 transitions. [2021-12-17 23:19:55,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:19:55,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 119 states and 10262 transitions. [2021-12-17 23:19:55,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 120 states, 119 states have (on average 86.23529411764706) internal successors, (10262), 119 states have internal predecessors, (10262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:55,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 120 states, 120 states have (on average 171.0) internal successors, (20520), 120 states have internal predecessors, (20520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:55,176 INFO L81 ComplementDD]: Finished complementDD. Result has 120 states, 120 states have (on average 171.0) internal successors, (20520), 120 states have internal predecessors, (20520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:55,176 INFO L186 Difference]: Start difference. First operand has 190 places, 175 transitions, 724 flow. Second operand 119 states and 10262 transitions. [2021-12-17 23:19:55,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 1105 transitions, 6103 flow [2021-12-17 23:19:55,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 1105 transitions, 5947 flow, removed 17 selfloop flow, removed 5 redundant places. [2021-12-17 23:19:55,218 INFO L242 Difference]: Finished difference. Result has 368 places, 373 transitions, 2574 flow [2021-12-17 23:19:55,219 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=119, PETRI_FLOW=2574, PETRI_PLACES=368, PETRI_TRANSITIONS=373} [2021-12-17 23:19:55,219 INFO L334 CegarLoopForPetriNet]: 153 programPoint places, 215 predicate places. [2021-12-17 23:19:55,219 INFO L470 AbstractCegarLoop]: Abstraction has has 368 places, 373 transitions, 2574 flow [2021-12-17 23:19:55,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 83.84848484848484) internal successors, (2767), 33 states have internal predecessors, (2767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:19:55,220 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:19:55,220 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:19:55,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-17 23:19:55,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:19:55,435 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:19:55,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:19:55,436 INFO L85 PathProgramCache]: Analyzing trace with hash -815864226, now seen corresponding path program 2 times [2021-12-17 23:19:55,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:19:55,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014863058] [2021-12-17 23:19:55,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:19:55,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:19:55,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:19:55,906 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 23:19:55,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:19:55,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014863058] [2021-12-17 23:19:55,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014863058] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:19:55,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43600451] [2021-12-17 23:19:55,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 23:19:55,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:19:55,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:19:55,917 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:19:55,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 23:19:55,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 23:19:55,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:19:55,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-17 23:19:55,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:19:56,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 23:19:56,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:19:56,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:19:57,602 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-17 23:19:57,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 17 [2021-12-17 23:19:57,715 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:19:57,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:19:58,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:19:58,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 106 [2021-12-17 23:19:59,039 INFO L354 Elim1Store]: treesize reduction 9, result has 87.7 percent of original size [2021-12-17 23:19:59,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 592 treesize of output 575 [2021-12-17 23:19:59,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 23:19:59,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:19:59,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 304 treesize of output 286 [2021-12-17 23:19:59,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 23:19:59,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:19:59,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 496 treesize of output 370 [2021-12-17 23:20:02,904 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:20:02,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43600451] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:20:02,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:20:02,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 30, 28] total 73 [2021-12-17 23:20:02,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817931962] [2021-12-17 23:20:02,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:20:02,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-12-17 23:20:02,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:02,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-12-17 23:20:02,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=4711, Unknown=59, NotChecked=0, Total=5256 [2021-12-17 23:20:02,909 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 171 [2021-12-17 23:20:02,912 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 373 transitions, 2574 flow. Second operand has 73 states, 73 states have (on average 72.20547945205479) internal successors, (5271), 73 states have internal predecessors, (5271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:20:02,912 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:02,912 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 171 [2021-12-17 23:20:02,912 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:37,641 INFO L129 PetriNetUnfolder]: 19764/45894 cut-off events. [2021-12-17 23:20:37,642 INFO L130 PetriNetUnfolder]: For 547825/549144 co-relation queries the response was YES. [2021-12-17 23:20:38,242 INFO L84 FinitePrefix]: Finished finitePrefix Result has 196291 conditions, 45894 events. 19764/45894 cut-off events. For 547825/549144 co-relation queries the response was YES. Maximal size of possible extension queue 1113. Compared 504169 event pairs, 2865 based on Foata normal form. 253/44371 useless extension candidates. Maximal degree in co-relation 167333. Up to 6809 conditions per place. [2021-12-17 23:20:38,354 INFO L132 encePairwiseOnDemand]: 125/171 looper letters, 676 selfloop transitions, 172 changer transitions 1993/2942 dead transitions. [2021-12-17 23:20:38,354 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 666 places, 2942 transitions, 27348 flow [2021-12-17 23:20:38,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 337 states. [2021-12-17 23:20:38,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2021-12-17 23:20:38,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 25487 transitions. [2021-12-17 23:20:38,562 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.442275322331546 [2021-12-17 23:20:38,563 INFO L72 ComplementDD]: Start complementDD. Operand 337 states and 25487 transitions. [2021-12-17 23:20:38,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 337 states and 25487 transitions. [2021-12-17 23:20:38,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:20:38,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 337 states and 25487 transitions. [2021-12-17 23:20:38,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 338 states, 337 states have (on average 75.62908011869436) internal successors, (25487), 337 states have internal predecessors, (25487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:20:38,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 338 states, 338 states have (on average 171.0) internal successors, (57798), 338 states have internal predecessors, (57798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:20:38,690 INFO L81 ComplementDD]: Finished complementDD. Result has 338 states, 338 states have (on average 171.0) internal successors, (57798), 338 states have internal predecessors, (57798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:20:38,690 INFO L186 Difference]: Start difference. First operand has 368 places, 373 transitions, 2574 flow. Second operand 337 states and 25487 transitions. [2021-12-17 23:20:38,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 666 places, 2942 transitions, 27348 flow [2021-12-17 23:20:40,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 651 places, 2942 transitions, 26659 flow, removed 287 selfloop flow, removed 15 redundant places. [2021-12-17 23:20:40,358 INFO L242 Difference]: Finished difference. Result has 957 places, 360 transitions, 4081 flow [2021-12-17 23:20:40,359 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=2397, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=337, PETRI_FLOW=4081, PETRI_PLACES=957, PETRI_TRANSITIONS=360} [2021-12-17 23:20:40,359 INFO L334 CegarLoopForPetriNet]: 153 programPoint places, 804 predicate places. [2021-12-17 23:20:40,359 INFO L470 AbstractCegarLoop]: Abstraction has has 957 places, 360 transitions, 4081 flow [2021-12-17 23:20:40,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 72.20547945205479) internal successors, (5271), 73 states have internal predecessors, (5271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:20:40,361 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:20:40,361 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:20:40,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 23:20:40,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 23:20:40,578 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:20:40,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:20:40,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1307619642, now seen corresponding path program 3 times [2021-12-17 23:20:40,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:20:40,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715550493] [2021-12-17 23:20:40,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:20:40,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:20:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:20:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:20:41,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:20:41,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715550493] [2021-12-17 23:20:41,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715550493] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:20:41,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978633777] [2021-12-17 23:20:41,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 23:20:41,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:20:41,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:20:41,228 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:20:41,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 23:20:41,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-17 23:20:41,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:20:41,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-17 23:20:41,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:20:42,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:20:42,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-17 23:20:43,061 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-17 23:20:43,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 17 [2021-12-17 23:20:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:20:43,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:20:43,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:20:43,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 132 treesize of output 164 [2021-12-17 23:20:43,722 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:20:43,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 70 [2021-12-17 23:20:46,679 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:20:46,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978633777] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:20:46,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:20:46,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 30] total 76 [2021-12-17 23:20:46,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767523690] [2021-12-17 23:20:46,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:20:46,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-12-17 23:20:46,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:20:46,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-12-17 23:20:46,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=5203, Unknown=2, NotChecked=0, Total=5700 [2021-12-17 23:20:46,686 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2021-12-17 23:20:46,688 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 957 places, 360 transitions, 4081 flow. Second operand has 76 states, 76 states have (on average 70.05263157894737) internal successors, (5324), 76 states have internal predecessors, (5324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:20:46,689 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:20:46,689 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2021-12-17 23:20:46,689 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:20:52,652 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| c_~f~0.base))) (let ((.cse4 (<= c_~size~0 1)) (.cse1 (select .cse0 c_~f~0.offset)) (.cse5 (= c_~f~0.offset 0))) (and (= (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset)) c_~x1~0) (= |c_thread2Thread1of1ForFork1_#t~mem3#1| .cse1) (forall ((v_ArrVal_207 (Array Int Int))) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_207) c_~f~0.base))) (let ((.cse2 (select .cse3 (+ (* c_~x2~0 4) c_~f~0.offset)))) (or (< .cse2 0) (<= c_~size~0 .cse2) (= (select .cse3 (+ (* c_~x1~0 4) c_~f~0.offset)) (select .cse3 (+ c_~f~0.offset (* .cse2 4)))))))) .cse4 (= c_~x2~0 0) (or (<= (+ (* 4 c_~x1~0) c_~f~0.offset 1) 0) .cse4) (= |c_thread2Thread1of1ForFork1_#t~mem3#1| c_~x1~0) (or (and (= c_~x1~0 0) (= (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset)) c_~x2~0) .cse5) (= |c_thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| 0)) (< 0 c_~size~0) (= c_~x1~0 .cse1) .cse5))) is different from false [2021-12-17 23:21:27,366 INFO L129 PetriNetUnfolder]: 16447/39950 cut-off events. [2021-12-17 23:21:27,379 INFO L130 PetriNetUnfolder]: For 9313799/9316708 co-relation queries the response was YES. [2021-12-17 23:21:29,683 INFO L84 FinitePrefix]: Finished finitePrefix Result has 565551 conditions, 39950 events. 16447/39950 cut-off events. For 9313799/9316708 co-relation queries the response was YES. Maximal size of possible extension queue 930. Compared 443738 event pairs, 2719 based on Foata normal form. 304/39852 useless extension candidates. Maximal degree in co-relation 565128. Up to 6158 conditions per place. [2021-12-17 23:21:29,827 INFO L132 encePairwiseOnDemand]: 122/171 looper letters, 612 selfloop transitions, 271 changer transitions 1002/1983 dead transitions. [2021-12-17 23:21:29,827 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 869 places, 1983 transitions, 59205 flow [2021-12-17 23:21:29,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 207 states. [2021-12-17 23:21:29,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2021-12-17 23:21:29,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 15254 transitions. [2021-12-17 23:21:29,838 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4309404751815126 [2021-12-17 23:21:29,838 INFO L72 ComplementDD]: Start complementDD. Operand 207 states and 15254 transitions. [2021-12-17 23:21:29,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 207 states and 15254 transitions. [2021-12-17 23:21:29,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:21:29,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 207 states and 15254 transitions. [2021-12-17 23:21:29,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 208 states, 207 states have (on average 73.69082125603865) internal successors, (15254), 207 states have internal predecessors, (15254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:21:29,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 208 states, 208 states have (on average 171.0) internal successors, (35568), 208 states have internal predecessors, (35568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:21:29,891 INFO L81 ComplementDD]: Finished complementDD. Result has 208 states, 208 states have (on average 171.0) internal successors, (35568), 208 states have internal predecessors, (35568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:21:29,891 INFO L186 Difference]: Start difference. First operand has 957 places, 360 transitions, 4081 flow. Second operand 207 states and 15254 transitions. [2021-12-17 23:21:29,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 869 places, 1983 transitions, 59205 flow [2021-12-17 23:21:43,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 1983 transitions, 26015 flow, removed 16570 selfloop flow, removed 274 redundant places. [2021-12-17 23:21:43,300 INFO L242 Difference]: Finished difference. Result has 742 places, 540 transitions, 7560 flow [2021-12-17 23:21:43,301 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=2505, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=207, PETRI_FLOW=7560, PETRI_PLACES=742, PETRI_TRANSITIONS=540} [2021-12-17 23:21:43,301 INFO L334 CegarLoopForPetriNet]: 153 programPoint places, 589 predicate places. [2021-12-17 23:21:43,301 INFO L470 AbstractCegarLoop]: Abstraction has has 742 places, 540 transitions, 7560 flow [2021-12-17 23:21:43,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 70.05263157894737) internal successors, (5324), 76 states have internal predecessors, (5324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:21:43,302 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:21:43,302 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:21:43,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 23:21:43,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:21:43,506 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 23:21:43,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:21:43,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1678059938, now seen corresponding path program 4 times [2021-12-17 23:21:43,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:21:43,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291644525] [2021-12-17 23:21:43,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:21:43,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:21:43,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:21:43,981 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 23:21:43,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:21:43,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291644525] [2021-12-17 23:21:43,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291644525] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:21:43,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625602502] [2021-12-17 23:21:43,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 23:21:43,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:21:43,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:21:43,982 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:21:44,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 23:21:44,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 23:21:44,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:21:44,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-17 23:21:44,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:21:45,336 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-17 23:21:45,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2021-12-17 23:21:45,358 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 23:21:45,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:21:45,668 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-17 23:21:45,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2021-12-17 23:21:46,108 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 23:21:46,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625602502] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:21:46,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:21:46,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20, 20] total 51 [2021-12-17 23:21:46,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38792918] [2021-12-17 23:21:46,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:21:46,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-17 23:21:46,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:21:46,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-17 23:21:46,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=2312, Unknown=0, NotChecked=0, Total=2550 [2021-12-17 23:21:46,112 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 171 [2021-12-17 23:21:46,113 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 742 places, 540 transitions, 7560 flow. Second operand has 51 states, 51 states have (on average 80.31372549019608) internal successors, (4096), 51 states have internal predecessors, (4096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:21:46,113 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:21:46,113 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 171 [2021-12-17 23:21:46,113 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand