./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-atomic/gcd-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-atomic/gcd-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash abac4834eb8b1123405a2c6108c3d30e84ad22df2224a055d262e226b4ba66e1 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:16:35,321 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:16:35,323 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:16:35,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:16:35,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:16:35,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:16:35,397 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:16:35,399 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:16:35,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:16:35,404 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:16:35,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:16:35,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:16:35,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:16:35,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:16:35,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:16:35,412 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:16:35,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:16:35,413 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:16:35,414 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:16:35,418 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:16:35,419 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:16:35,420 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:16:35,421 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:16:35,421 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:16:35,422 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:16:35,425 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:16:35,430 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:16:35,430 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:16:35,431 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:16:35,431 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:16:35,432 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:16:35,432 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:16:35,433 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:16:35,433 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:16:35,434 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:16:35,434 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:16:35,434 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:16:35,435 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:16:35,435 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:16:35,435 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:16:35,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:16:35,444 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:16:35,445 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:16:35,480 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:16:35,481 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:16:35,481 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:16:35,481 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:16:35,481 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:16:35,482 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:16:35,482 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:16:35,482 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:16:35,482 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:16:35,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:16:35,483 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:16:35,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:16:35,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:16:35,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:16:35,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:16:35,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:16:35,484 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:16:35,484 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:16:35,484 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:16:35,485 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:16:35,485 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:16:35,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:16:35,485 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:16:35,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:16:35,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:16:35,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:16:35,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:16:35,486 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:16:35,486 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:16:35,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:16:35,487 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:16:35,487 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:16:35,487 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:16:35,487 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> abac4834eb8b1123405a2c6108c3d30e84ad22df2224a055d262e226b4ba66e1 [2022-07-22 21:16:35,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:16:35,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:16:35,688 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:16:35,689 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:16:35,690 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:16:35,691 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-atomic/gcd-2.i [2022-07-22 21:16:35,730 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea6be7ee2/f6284067c6204e32906dff7cd61903a8/FLAG4b8ac92e7 [2022-07-22 21:16:36,084 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:16:36,085 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/gcd-2.i [2022-07-22 21:16:36,092 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea6be7ee2/f6284067c6204e32906dff7cd61903a8/FLAG4b8ac92e7 [2022-07-22 21:16:36,105 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea6be7ee2/f6284067c6204e32906dff7cd61903a8 [2022-07-22 21:16:36,107 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:16:36,109 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:16:36,110 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:16:36,110 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:16:36,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:16:36,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:16:36" (1/1) ... [2022-07-22 21:16:36,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47ecf2a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:16:36, skipping insertion in model container [2022-07-22 21:16:36,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:16:36" (1/1) ... [2022-07-22 21:16:36,118 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:16:36,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:16:36,292 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/gcd-2.i[938,951] [2022-07-22 21:16:36,422 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:16:36,427 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:16:36,436 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/gcd-2.i[938,951] [2022-07-22 21:16:36,465 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:16:36,491 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:16:36,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:16:36 WrapperNode [2022-07-22 21:16:36,492 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:16:36,493 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:16:36,493 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:16:36,493 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:16:36,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:16:36" (1/1) ... [2022-07-22 21:16:36,509 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:16:36" (1/1) ... [2022-07-22 21:16:36,541 INFO L137 Inliner]: procedures = 174, calls = 30, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 122 [2022-07-22 21:16:36,542 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:16:36,542 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:16:36,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:16:36,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:16:36,549 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:16:36" (1/1) ... [2022-07-22 21:16:36,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:16:36" (1/1) ... [2022-07-22 21:16:36,558 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:16:36" (1/1) ... [2022-07-22 21:16:36,559 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:16:36" (1/1) ... [2022-07-22 21:16:36,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:16:36" (1/1) ... [2022-07-22 21:16:36,571 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:16:36" (1/1) ... [2022-07-22 21:16:36,572 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:16:36" (1/1) ... [2022-07-22 21:16:36,579 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:16:36,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:16:36,580 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:16:36,580 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:16:36,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:16:36" (1/1) ... [2022-07-22 21:16:36,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:16:36,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:16:36,607 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 21:16:36,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 21:16:36,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:16:36,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:16:36,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:16:36,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:16:36,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:16:36,633 INFO L130 BoogieDeclarations]: Found specification of procedure dec_a [2022-07-22 21:16:36,633 INFO L138 BoogieDeclarations]: Found implementation of procedure dec_a [2022-07-22 21:16:36,633 INFO L130 BoogieDeclarations]: Found specification of procedure dec_b [2022-07-22 21:16:36,633 INFO L138 BoogieDeclarations]: Found implementation of procedure dec_b [2022-07-22 21:16:36,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:16:36,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:16:36,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:16:36,634 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:16:36,720 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:16:36,721 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:16:36,934 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:16:36,972 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:16:36,973 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 21:16:36,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:16:36 BoogieIcfgContainer [2022-07-22 21:16:36,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:16:36,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:16:36,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:16:36,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:16:36,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:16:36" (1/3) ... [2022-07-22 21:16:36,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6032fcf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:16:36, skipping insertion in model container [2022-07-22 21:16:36,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:16:36" (2/3) ... [2022-07-22 21:16:36,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6032fcf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:16:36, skipping insertion in model container [2022-07-22 21:16:36,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:16:36" (3/3) ... [2022-07-22 21:16:36,980 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd-2.i [2022-07-22 21:16:36,984 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:16:36,997 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:16:36,998 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-07-22 21:16:36,998 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:16:37,044 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-22 21:16:37,076 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 148 places, 153 transitions, 322 flow [2022-07-22 21:16:37,141 INFO L129 PetriNetUnfolder]: 12/151 cut-off events. [2022-07-22 21:16:37,143 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:16:37,145 INFO L84 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 151 events. 12/151 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 64 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2022-07-22 21:16:37,146 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 153 transitions, 322 flow [2022-07-22 21:16:37,152 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 141 transitions, 294 flow [2022-07-22 21:16:37,166 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:16:37,172 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7215dfee, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@26bc3928 [2022-07-22 21:16:37,172 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-22 21:16:37,203 INFO L129 PetriNetUnfolder]: 9/122 cut-off events. [2022-07-22 21:16:37,203 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:16:37,203 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:16:37,204 INFO L200 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] [2022-07-22 21:16:37,205 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-22 21:16:37,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:16:37,209 INFO L85 PathProgramCache]: Analyzing trace with hash 442637653, now seen corresponding path program 1 times [2022-07-22 21:16:37,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:16:37,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450290658] [2022-07-22 21:16:37,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:16:37,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:16:37,354 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 21:16:37,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [900320825] [2022-07-22 21:16:37,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:16:37,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:16:37,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:16:37,384 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:16:37,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:16:37,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:16:37,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-22 21:16:37,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:16:38,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:16:38,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:16:38,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:16:38,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450290658] [2022-07-22 21:16:38,165 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 21:16:38,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900320825] [2022-07-22 21:16:38,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900320825] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:16:38,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:16:38,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-22 21:16:38,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617963320] [2022-07-22 21:16:38,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:16:38,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 21:16:38,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:16:38,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 21:16:38,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-07-22 21:16:38,204 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 153 [2022-07-22 21:16:38,209 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 141 transitions, 294 flow. Second operand has 15 states, 15 states have (on average 77.93333333333334) internal successors, (1169), 15 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:16:38,209 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:16:38,210 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 153 [2022-07-22 21:16:38,210 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:16:38,740 INFO L129 PetriNetUnfolder]: 41/286 cut-off events. [2022-07-22 21:16:38,740 INFO L130 PetriNetUnfolder]: For 37/45 co-relation queries the response was YES. [2022-07-22 21:16:38,740 INFO L84 FinitePrefix]: Finished finitePrefix Result has 480 conditions, 286 events. 41/286 cut-off events. For 37/45 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 618 event pairs, 18 based on Foata normal form. 11/256 useless extension candidates. Maximal degree in co-relation 162. Up to 80 conditions per place. [2022-07-22 21:16:38,742 INFO L132 encePairwiseOnDemand]: 125/153 looper letters, 80 selfloop transitions, 18 changer transitions 8/173 dead transitions. [2022-07-22 21:16:38,742 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 173 transitions, 579 flow [2022-07-22 21:16:38,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 21:16:38,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-22 21:16:38,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1472 transitions. [2022-07-22 21:16:38,755 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5344952795933188 [2022-07-22 21:16:38,755 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1472 transitions. [2022-07-22 21:16:38,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1472 transitions. [2022-07-22 21:16:38,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:16:38,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1472 transitions. [2022-07-22 21:16:38,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 81.77777777777777) internal successors, (1472), 18 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:16:38,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 153.0) internal successors, (2907), 19 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:16:38,770 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 153.0) internal successors, (2907), 19 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:16:38,772 INFO L186 Difference]: Start difference. First operand has 137 places, 141 transitions, 294 flow. Second operand 18 states and 1472 transitions. [2022-07-22 21:16:38,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 173 transitions, 579 flow [2022-07-22 21:16:38,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 173 transitions, 565 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:16:38,777 INFO L242 Difference]: Finished difference. Result has 157 places, 135 transitions, 352 flow [2022-07-22 21:16:38,778 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=352, PETRI_PLACES=157, PETRI_TRANSITIONS=135} [2022-07-22 21:16:38,780 INFO L279 CegarLoopForPetriNet]: 137 programPoint places, 20 predicate places. [2022-07-22 21:16:38,781 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 135 transitions, 352 flow [2022-07-22 21:16:38,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 77.93333333333334) internal successors, (1169), 15 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:16:38,781 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:16:38,781 INFO L200 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] [2022-07-22 21:16:38,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 21:16:39,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-07-22 21:16:39,001 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-22 21:16:39,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:16:39,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1087535899, now seen corresponding path program 1 times [2022-07-22 21:16:39,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:16:39,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924598506] [2022-07-22 21:16:39,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:16:39,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:16:39,038 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 21:16:39,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1498360264] [2022-07-22 21:16:39,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:16:39,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:16:39,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:16:39,048 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:16:39,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:16:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:16:39,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-22 21:16:39,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:16:40,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:16:40,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:17:04,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:17:04,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:17:04,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924598506] [2022-07-22 21:17:04,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 21:17:04,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498360264] [2022-07-22 21:17:04,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498360264] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:17:04,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:17:04,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 33 [2022-07-22 21:17:04,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185756629] [2022-07-22 21:17:04,819 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 21:17:04,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-22 21:17:04,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:17:04,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-22 21:17:04,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=958, Unknown=3, NotChecked=0, Total=1056 [2022-07-22 21:17:04,824 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 153 [2022-07-22 21:17:04,826 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 135 transitions, 352 flow. Second operand has 33 states, 33 states have (on average 73.66666666666667) internal successors, (2431), 33 states have internal predecessors, (2431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:17:04,827 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:17:04,827 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 153 [2022-07-22 21:17:04,827 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:17:06,835 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 21:17:12,981 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 21:17:17,519 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 21:17:21,211 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 21:17:23,216 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 21:17:27,335 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 21:17:57,427 WARN L233 SmtUtils]: Spent 25.16s on a formula simplification. DAG size of input: 58 DAG size of output: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 21:17:59,443 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 21:18:04,845 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 21:18:07,035 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 21:18:09,459 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 21:18:11,653 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 21:18:26,065 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 21:18:28,520 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 21:18:30,527 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 21:18:32,542 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 21:18:34,551 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 21:18:37,428 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 21:18:39,440 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 21:18:47,151 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 21:18:49,157 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 21:18:51,170 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 21:18:53,178 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 21:18:55,188 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 21:18:58,125 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 21:19:02,536 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 21:19:35,404 WARN L233 SmtUtils]: Spent 26.11s on a formula simplification. DAG size of input: 63 DAG size of output: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 21:19:43,829 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 21:20:17,030 WARN L233 SmtUtils]: Spent 26.21s on a formula simplification. DAG size of input: 68 DAG size of output: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 21:20:28,481 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 21:21:05,308 WARN L233 SmtUtils]: Spent 30.35s on a formula simplification. DAG size of input: 75 DAG size of output: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 21:21:15,429 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 21:21:17,943 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []