./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-counter-queue.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/popl20-bad-counter-queue.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 c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 22:52:01,254 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 22:52:01,256 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 22:52:01,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 22:52:01,316 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 22:52:01,317 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 22:52:01,318 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 22:52:01,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 22:52:01,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 22:52:01,322 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 22:52:01,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 22:52:01,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 22:52:01,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 22:52:01,328 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 22:52:01,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 22:52:01,331 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 22:52:01,336 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 22:52:01,337 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 22:52:01,342 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 22:52:01,344 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 22:52:01,345 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 22:52:01,350 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 22:52:01,351 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 22:52:01,352 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 22:52:01,354 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 22:52:01,357 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 22:52:01,357 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 22:52:01,358 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 22:52:01,358 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 22:52:01,359 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 22:52:01,360 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 22:52:01,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 22:52:01,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 22:52:01,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 22:52:01,363 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 22:52:01,364 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 22:52:01,365 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 22:52:01,365 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 22:52:01,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 22:52:01,366 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 22:52:01,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 22:52:01,367 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 22:52:01,390 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 22:52:01,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 22:52:01,391 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 22:52:01,391 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 22:52:01,392 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 22:52:01,392 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 22:52:01,392 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 22:52:01,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 22:52:01,393 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 22:52:01,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 22:52:01,393 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 22:52:01,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 22:52:01,394 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 22:52:01,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 22:52:01,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 22:52:01,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 22:52:01,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 22:52:01,395 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 22:52:01,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 22:52:01,395 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 22:52:01,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 22:52:01,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 22:52:01,396 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 22:52:01,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 22:52:01,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 22:52:01,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 22:52:01,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 22:52:01,397 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 22:52:01,397 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 22:52:01,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 22:52:01,397 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 22:52:01,397 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 22:52:01,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 22:52:01,398 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 22:52:01,398 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e [2021-12-17 22:52:01,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 22:52:01,663 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 22:52:01,666 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 22:52:01,667 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 22:52:01,667 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 22:52:01,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2021-12-17 22:52:01,728 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/335f0bbdb/a85ac719f31b41fc8cb0ad78e585fc71/FLAGf5c1b7164 [2021-12-17 22:52:02,160 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 22:52:02,160 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2021-12-17 22:52:02,165 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/335f0bbdb/a85ac719f31b41fc8cb0ad78e585fc71/FLAGf5c1b7164 [2021-12-17 22:52:02,551 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/335f0bbdb/a85ac719f31b41fc8cb0ad78e585fc71 [2021-12-17 22:52:02,554 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 22:52:02,556 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 22:52:02,557 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 22:52:02,557 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 22:52:02,559 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 22:52:02,559 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 10:52:02" (1/1) ... [2021-12-17 22:52:02,560 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34a4ee8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:52:02, skipping insertion in model container [2021-12-17 22:52:02,560 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 10:52:02" (1/1) ... [2021-12-17 22:52:02,566 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 22:52:02,580 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 22:52:02,791 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/popl20-bad-counter-queue.wvr.c[2428,2441] [2021-12-17 22:52:02,812 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 22:52:02,819 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 22:52:02,852 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/popl20-bad-counter-queue.wvr.c[2428,2441] [2021-12-17 22:52:02,858 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 22:52:02,872 INFO L208 MainTranslator]: Completed translation [2021-12-17 22:52:02,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:52:02 WrapperNode [2021-12-17 22:52:02,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 22:52:02,874 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 22:52:02,874 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 22:52:02,874 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 22:52:02,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:52:02" (1/1) ... [2021-12-17 22:52:02,894 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:52:02" (1/1) ... [2021-12-17 22:52:02,923 INFO L137 Inliner]: procedures = 26, calls = 40, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 144 [2021-12-17 22:52:02,923 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 22:52:02,924 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 22:52:02,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 22:52:02,925 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 22:52:02,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:52:02" (1/1) ... [2021-12-17 22:52:02,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:52:02" (1/1) ... [2021-12-17 22:52:02,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:52:02" (1/1) ... [2021-12-17 22:52:02,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:52:02" (1/1) ... [2021-12-17 22:52:02,951 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:52:02" (1/1) ... [2021-12-17 22:52:02,962 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:52:02" (1/1) ... [2021-12-17 22:52:02,964 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:52:02" (1/1) ... [2021-12-17 22:52:02,972 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 22:52:02,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 22:52:02,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 22:52:02,975 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 22:52:02,976 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:52:02" (1/1) ... [2021-12-17 22:52:02,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 22:52:02,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:52:03,004 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 22:52:03,032 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 22:52:03,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 22:52:03,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 22:52:03,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 22:52:03,047 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 22:52:03,047 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-17 22:52:03,047 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-17 22:52:03,047 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-17 22:52:03,047 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-17 22:52:03,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 22:52:03,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-17 22:52:03,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-17 22:52:03,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 22:52:03,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 22:52:03,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 22:52:03,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 22:52:03,050 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 22:52:03,125 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 22:52:03,127 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 22:52:03,355 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 22:52:03,451 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 22:52:03,452 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-17 22:52:03,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:52:03 BoogieIcfgContainer [2021-12-17 22:52:03,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 22:52:03,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 22:52:03,455 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 22:52:03,461 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 22:52:03,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 10:52:02" (1/3) ... [2021-12-17 22:52:03,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37450ea8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 10:52:03, skipping insertion in model container [2021-12-17 22:52:03,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:52:02" (2/3) ... [2021-12-17 22:52:03,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37450ea8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 10:52:03, skipping insertion in model container [2021-12-17 22:52:03,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:52:03" (3/3) ... [2021-12-17 22:52:03,464 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2021-12-17 22:52:03,468 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-17 22:52:03,468 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 22:52:03,468 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 22:52:03,469 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-17 22:52:03,500 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,501 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,501 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,501 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,501 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,502 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,502 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,502 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,502 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,502 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,503 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,503 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,503 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,503 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,503 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,504 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~tmp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,504 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,504 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,505 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,505 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,505 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,506 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,506 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,506 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,506 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,507 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,507 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~tmp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,507 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,507 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,507 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,507 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,508 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,508 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~tmp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,509 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~tmp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,509 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,509 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,509 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,509 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,510 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,510 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,510 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,510 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,510 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,510 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,512 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,512 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,512 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,512 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,513 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,513 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,513 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,513 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,513 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,514 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,514 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,514 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,514 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,515 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,515 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~tmp~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,515 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,516 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,516 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,516 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,517 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,517 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,517 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,517 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,518 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,518 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,518 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~tmp~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,518 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,518 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,518 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,519 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,519 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,519 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,520 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~tmp~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,520 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~tmp~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,520 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,521 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,523 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,523 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,523 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,524 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,524 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,525 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,525 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,525 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,529 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~tmp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,534 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,534 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,534 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,534 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,534 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,535 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,535 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,535 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,535 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,536 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,536 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,536 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_plus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,536 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,538 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,538 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,538 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,538 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,538 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,539 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,539 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,539 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,539 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,539 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,540 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,540 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,540 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~tmp~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,540 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:52:03,543 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-17 22:52:03,594 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 22:52:03,598 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 22:52:03,598 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-17 22:52:03,607 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 117 places, 119 transitions, 254 flow [2021-12-17 22:52:03,648 INFO L129 PetriNetUnfolder]: 9/117 cut-off events. [2021-12-17 22:52:03,648 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-17 22:52:03,651 INFO L84 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 117 events. 9/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 72 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2021-12-17 22:52:03,652 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 119 transitions, 254 flow [2021-12-17 22:52:03,656 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 108 transitions, 228 flow [2021-12-17 22:52:03,689 INFO L129 PetriNetUnfolder]: 9/107 cut-off events. [2021-12-17 22:52:03,689 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-17 22:52:03,690 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:52:03,690 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] [2021-12-17 22:52:03,691 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:52:03,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:52:03,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1888672242, now seen corresponding path program 1 times [2021-12-17 22:52:03,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:52:03,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869000234] [2021-12-17 22:52:03,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:03,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:52:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:04,045 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 22:52:04,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:52:04,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869000234] [2021-12-17 22:52:04,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869000234] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:52:04,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:52:04,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 22:52:04,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154548481] [2021-12-17 22:52:04,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:52:04,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 22:52:04,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:52:04,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 22:52:04,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 22:52:04,096 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 119 [2021-12-17 22:52:04,102 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 108 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 0 states have call successors, (0), 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 22:52:04,102 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:52:04,102 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 119 [2021-12-17 22:52:04,103 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:52:04,270 INFO L129 PetriNetUnfolder]: 26/185 cut-off events. [2021-12-17 22:52:04,270 INFO L130 PetriNetUnfolder]: For 35/36 co-relation queries the response was YES. [2021-12-17 22:52:04,272 INFO L84 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 185 events. 26/185 cut-off events. For 35/36 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 447 event pairs, 6 based on Foata normal form. 22/193 useless extension candidates. Maximal degree in co-relation 122. Up to 39 conditions per place. [2021-12-17 22:52:04,275 INFO L132 encePairwiseOnDemand]: 104/119 looper letters, 24 selfloop transitions, 3 changer transitions 8/113 dead transitions. [2021-12-17 22:52:04,275 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 113 transitions, 317 flow [2021-12-17 22:52:04,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 22:52:04,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-17 22:52:04,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 661 transitions. [2021-12-17 22:52:04,295 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7935174069627852 [2021-12-17 22:52:04,296 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 661 transitions. [2021-12-17 22:52:04,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 661 transitions. [2021-12-17 22:52:04,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:52:04,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 661 transitions. [2021-12-17 22:52:04,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 94.42857142857143) internal successors, (661), 7 states have internal predecessors, (661), 0 states have call successors, (0), 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 22:52:04,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 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 22:52:04,315 INFO L81 ComplementDD]: Finished complementDD. Result 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 22:52:04,317 INFO L186 Difference]: Start difference. First operand has 106 places, 108 transitions, 228 flow. Second operand 7 states and 661 transitions. [2021-12-17 22:52:04,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 113 transitions, 317 flow [2021-12-17 22:52:04,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 113 transitions, 303 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-17 22:52:04,329 INFO L242 Difference]: Finished difference. Result has 111 places, 101 transitions, 225 flow [2021-12-17 22:52:04,331 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=225, PETRI_PLACES=111, PETRI_TRANSITIONS=101} [2021-12-17 22:52:04,334 INFO L334 CegarLoopForPetriNet]: 106 programPoint places, 5 predicate places. [2021-12-17 22:52:04,334 INFO L470 AbstractCegarLoop]: Abstraction has has 111 places, 101 transitions, 225 flow [2021-12-17 22:52:04,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 0 states have call successors, (0), 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 22:52:04,334 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:52:04,335 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] [2021-12-17 22:52:04,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 22:52:04,335 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:52:04,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:52:04,336 INFO L85 PathProgramCache]: Analyzing trace with hash 397909448, now seen corresponding path program 1 times [2021-12-17 22:52:04,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:52:04,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648254708] [2021-12-17 22:52:04,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:04,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:52:04,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:04,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:52:04,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:52:04,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648254708] [2021-12-17 22:52:04,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648254708] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:52:04,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:52:04,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 22:52:04,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999339134] [2021-12-17 22:52:04,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:52:04,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 22:52:04,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:52:04,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 22:52:04,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 22:52:04,534 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 119 [2021-12-17 22:52:04,535 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 101 transitions, 225 flow. Second operand has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 0 states have call successors, (0), 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 22:52:04,535 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:52:04,535 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 119 [2021-12-17 22:52:04,535 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:52:04,746 INFO L129 PetriNetUnfolder]: 95/406 cut-off events. [2021-12-17 22:52:04,746 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2021-12-17 22:52:04,748 INFO L84 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 406 events. 95/406 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1804 event pairs, 42 based on Foata normal form. 0/356 useless extension candidates. Maximal degree in co-relation 654. Up to 136 conditions per place. [2021-12-17 22:52:04,749 INFO L132 encePairwiseOnDemand]: 110/119 looper letters, 37 selfloop transitions, 8 changer transitions 0/119 dead transitions. [2021-12-17 22:52:04,756 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 119 transitions, 356 flow [2021-12-17 22:52:04,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 22:52:04,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-17 22:52:04,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 726 transitions. [2021-12-17 22:52:04,758 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7626050420168067 [2021-12-17 22:52:04,758 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 726 transitions. [2021-12-17 22:52:04,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 726 transitions. [2021-12-17 22:52:04,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:52:04,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 726 transitions. [2021-12-17 22:52:04,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 90.75) internal successors, (726), 8 states have internal predecessors, (726), 0 states have call successors, (0), 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 22:52:04,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 119.0) internal successors, (1071), 9 states have internal predecessors, (1071), 0 states have call successors, (0), 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 22:52:04,776 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 119.0) internal successors, (1071), 9 states have internal predecessors, (1071), 0 states have call successors, (0), 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 22:52:04,777 INFO L186 Difference]: Start difference. First operand has 111 places, 101 transitions, 225 flow. Second operand 8 states and 726 transitions. [2021-12-17 22:52:04,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 119 transitions, 356 flow [2021-12-17 22:52:04,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 119 transitions, 349 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-12-17 22:52:04,780 INFO L242 Difference]: Finished difference. Result has 111 places, 104 transitions, 254 flow [2021-12-17 22:52:04,781 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=254, PETRI_PLACES=111, PETRI_TRANSITIONS=104} [2021-12-17 22:52:04,781 INFO L334 CegarLoopForPetriNet]: 106 programPoint places, 5 predicate places. [2021-12-17 22:52:04,782 INFO L470 AbstractCegarLoop]: Abstraction has has 111 places, 104 transitions, 254 flow [2021-12-17 22:52:04,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 0 states have call successors, (0), 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 22:52:04,782 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:52:04,783 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] [2021-12-17 22:52:04,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 22:52:04,783 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:52:04,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:52:04,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1293595690, now seen corresponding path program 1 times [2021-12-17 22:52:04,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:52:04,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134954151] [2021-12-17 22:52:04,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:04,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:52:04,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:04,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:52:04,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:52:04,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134954151] [2021-12-17 22:52:04,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134954151] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:52:04,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:52:04,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 22:52:04,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860069361] [2021-12-17 22:52:04,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:52:04,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 22:52:04,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:52:04,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 22:52:04,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 22:52:04,926 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 119 [2021-12-17 22:52:04,927 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 104 transitions, 254 flow. Second operand has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 0 states have call successors, (0), 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 22:52:04,927 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:52:04,927 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 119 [2021-12-17 22:52:04,927 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:52:05,094 INFO L129 PetriNetUnfolder]: 81/328 cut-off events. [2021-12-17 22:52:05,095 INFO L130 PetriNetUnfolder]: For 48/51 co-relation queries the response was YES. [2021-12-17 22:52:05,098 INFO L84 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 328 events. 81/328 cut-off events. For 48/51 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1272 event pairs, 47 based on Foata normal form. 3/306 useless extension candidates. Maximal degree in co-relation 422. Up to 144 conditions per place. [2021-12-17 22:52:05,099 INFO L132 encePairwiseOnDemand]: 110/119 looper letters, 25 selfloop transitions, 6 changer transitions 11/116 dead transitions. [2021-12-17 22:52:05,100 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 116 transitions, 365 flow [2021-12-17 22:52:05,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 22:52:05,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-17 22:52:05,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 722 transitions. [2021-12-17 22:52:05,103 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7584033613445378 [2021-12-17 22:52:05,103 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 722 transitions. [2021-12-17 22:52:05,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 722 transitions. [2021-12-17 22:52:05,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:52:05,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 722 transitions. [2021-12-17 22:52:05,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 90.25) internal successors, (722), 8 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:52:05,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 119.0) internal successors, (1071), 9 states have internal predecessors, (1071), 0 states have call successors, (0), 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 22:52:05,108 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 119.0) internal successors, (1071), 9 states have internal predecessors, (1071), 0 states have call successors, (0), 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 22:52:05,108 INFO L186 Difference]: Start difference. First operand has 111 places, 104 transitions, 254 flow. Second operand 8 states and 722 transitions. [2021-12-17 22:52:05,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 116 transitions, 365 flow [2021-12-17 22:52:05,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 116 transitions, 355 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-17 22:52:05,116 INFO L242 Difference]: Finished difference. Result has 116 places, 102 transitions, 248 flow [2021-12-17 22:52:05,116 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=248, PETRI_PLACES=116, PETRI_TRANSITIONS=102} [2021-12-17 22:52:05,118 INFO L334 CegarLoopForPetriNet]: 106 programPoint places, 10 predicate places. [2021-12-17 22:52:05,118 INFO L470 AbstractCegarLoop]: Abstraction has has 116 places, 102 transitions, 248 flow [2021-12-17 22:52:05,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 0 states have call successors, (0), 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 22:52:05,119 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:52:05,119 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] [2021-12-17 22:52:05,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 22:52:05,119 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:52:05,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:52:05,121 INFO L85 PathProgramCache]: Analyzing trace with hash -63413436, now seen corresponding path program 1 times [2021-12-17 22:52:05,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:52:05,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164883626] [2021-12-17 22:52:05,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:05,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:52:05,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:05,265 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 22:52:05,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:52:05,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164883626] [2021-12-17 22:52:05,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164883626] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:52:05,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321620921] [2021-12-17 22:52:05,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:05,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:52:05,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:52:05,275 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 22:52:05,282 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 22:52:05,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:05,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 22:52:05,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:52:05,644 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 22:52:05,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:52:05,888 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 22:52:05,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321620921] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 22:52:05,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 22:52:05,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2021-12-17 22:52:05,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494526981] [2021-12-17 22:52:05,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:52:05,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 22:52:05,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:52:05,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 22:52:05,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-12-17 22:52:05,891 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 119 [2021-12-17 22:52:05,892 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 102 transitions, 248 flow. Second operand has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 0 states have call successors, (0), 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 22:52:05,892 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:52:05,892 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 119 [2021-12-17 22:52:05,892 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:52:06,006 INFO L129 PetriNetUnfolder]: 70/263 cut-off events. [2021-12-17 22:52:06,006 INFO L130 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2021-12-17 22:52:06,007 INFO L84 FinitePrefix]: Finished finitePrefix Result has 498 conditions, 263 events. 70/263 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 858 event pairs, 17 based on Foata normal form. 9/265 useless extension candidates. Maximal degree in co-relation 420. Up to 79 conditions per place. [2021-12-17 22:52:06,008 INFO L132 encePairwiseOnDemand]: 111/119 looper letters, 27 selfloop transitions, 7 changer transitions 0/108 dead transitions. [2021-12-17 22:52:06,008 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 108 transitions, 333 flow [2021-12-17 22:52:06,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 22:52:06,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-17 22:52:06,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 629 transitions. [2021-12-17 22:52:06,011 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7551020408163265 [2021-12-17 22:52:06,011 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 629 transitions. [2021-12-17 22:52:06,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 629 transitions. [2021-12-17 22:52:06,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:52:06,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 629 transitions. [2021-12-17 22:52:06,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 89.85714285714286) internal successors, (629), 7 states have internal predecessors, (629), 0 states have call successors, (0), 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 22:52:06,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 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 22:52:06,015 INFO L81 ComplementDD]: Finished complementDD. Result 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 22:52:06,015 INFO L186 Difference]: Start difference. First operand has 116 places, 102 transitions, 248 flow. Second operand 7 states and 629 transitions. [2021-12-17 22:52:06,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 108 transitions, 333 flow [2021-12-17 22:52:06,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 108 transitions, 307 flow, removed 7 selfloop flow, removed 9 redundant places. [2021-12-17 22:52:06,018 INFO L242 Difference]: Finished difference. Result has 112 places, 104 transitions, 259 flow [2021-12-17 22:52:06,018 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=259, PETRI_PLACES=112, PETRI_TRANSITIONS=104} [2021-12-17 22:52:06,019 INFO L334 CegarLoopForPetriNet]: 106 programPoint places, 6 predicate places. [2021-12-17 22:52:06,019 INFO L470 AbstractCegarLoop]: Abstraction has has 112 places, 104 transitions, 259 flow [2021-12-17 22:52:06,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 0 states have call successors, (0), 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 22:52:06,019 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:52:06,020 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] [2021-12-17 22:52:06,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-17 22:52:06,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:52:06,236 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:52:06,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:52:06,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1317879854, now seen corresponding path program 1 times [2021-12-17 22:52:06,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:52:06,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354557921] [2021-12-17 22:52:06,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:06,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:52:06,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:06,331 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 22:52:06,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:52:06,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354557921] [2021-12-17 22:52:06,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354557921] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:52:06,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444479714] [2021-12-17 22:52:06,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:06,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:52:06,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:52:06,336 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 22:52:06,346 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 22:52:06,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:06,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 22:52:06,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:52:06,618 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 22:52:06,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:52:06,858 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 22:52:06,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444479714] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 22:52:06,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 22:52:06,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2021-12-17 22:52:06,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453296909] [2021-12-17 22:52:06,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:52:06,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 22:52:06,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:52:06,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 22:52:06,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-12-17 22:52:06,862 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 119 [2021-12-17 22:52:06,862 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 104 transitions, 259 flow. Second operand has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 0 states have call successors, (0), 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 22:52:06,862 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:52:06,863 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 119 [2021-12-17 22:52:06,863 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:52:06,955 INFO L129 PetriNetUnfolder]: 59/261 cut-off events. [2021-12-17 22:52:06,955 INFO L130 PetriNetUnfolder]: For 76/90 co-relation queries the response was YES. [2021-12-17 22:52:06,956 INFO L84 FinitePrefix]: Finished finitePrefix Result has 497 conditions, 261 events. 59/261 cut-off events. For 76/90 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 783 event pairs, 20 based on Foata normal form. 14/262 useless extension candidates. Maximal degree in co-relation 418. Up to 67 conditions per place. [2021-12-17 22:52:06,957 INFO L132 encePairwiseOnDemand]: 111/119 looper letters, 29 selfloop transitions, 7 changer transitions 0/110 dead transitions. [2021-12-17 22:52:06,957 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 110 transitions, 352 flow [2021-12-17 22:52:06,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 22:52:06,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-17 22:52:06,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 629 transitions. [2021-12-17 22:52:06,960 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7551020408163265 [2021-12-17 22:52:06,960 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 629 transitions. [2021-12-17 22:52:06,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 629 transitions. [2021-12-17 22:52:06,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:52:06,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 629 transitions. [2021-12-17 22:52:06,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 89.85714285714286) internal successors, (629), 7 states have internal predecessors, (629), 0 states have call successors, (0), 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 22:52:06,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 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 22:52:06,965 INFO L81 ComplementDD]: Finished complementDD. Result 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 22:52:06,965 INFO L186 Difference]: Start difference. First operand has 112 places, 104 transitions, 259 flow. Second operand 7 states and 629 transitions. [2021-12-17 22:52:06,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 110 transitions, 352 flow [2021-12-17 22:52:06,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 110 transitions, 343 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-17 22:52:06,970 INFO L242 Difference]: Finished difference. Result has 116 places, 105 transitions, 278 flow [2021-12-17 22:52:06,970 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=278, PETRI_PLACES=116, PETRI_TRANSITIONS=105} [2021-12-17 22:52:06,972 INFO L334 CegarLoopForPetriNet]: 106 programPoint places, 10 predicate places. [2021-12-17 22:52:06,973 INFO L470 AbstractCegarLoop]: Abstraction has has 116 places, 105 transitions, 278 flow [2021-12-17 22:52:06,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 0 states have call successors, (0), 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 22:52:06,973 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:52:06,973 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] [2021-12-17 22:52:06,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 22:52:07,187 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 22:52:07,188 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:52:07,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:52:07,188 INFO L85 PathProgramCache]: Analyzing trace with hash -622709836, now seen corresponding path program 1 times [2021-12-17 22:52:07,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:52:07,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568864291] [2021-12-17 22:52:07,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:07,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:52:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:07,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:07,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:52:07,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568864291] [2021-12-17 22:52:07,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568864291] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:52:07,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355565063] [2021-12-17 22:52:07,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:07,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:52:07,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:52:07,565 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 22:52:07,578 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 22:52:07,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:07,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-17 22:52:07,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:52:08,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:08,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:52:08,243 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 22:52:08,244 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 21 treesize of output 22 [2021-12-17 22:52:08,268 INFO L354 Elim1Store]: treesize reduction 12, result has 25.0 percent of original size [2021-12-17 22:52:08,268 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 21 treesize of output 10 [2021-12-17 22:52:08,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:08,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355565063] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:52:08,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:52:08,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 10] total 23 [2021-12-17 22:52:08,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380771169] [2021-12-17 22:52:08,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:52:08,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-17 22:52:08,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:52:08,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-17 22:52:08,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-12-17 22:52:08,433 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 119 [2021-12-17 22:52:08,434 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 105 transitions, 278 flow. Second operand has 23 states, 23 states have (on average 63.43478260869565) internal successors, (1459), 23 states have internal predecessors, (1459), 0 states have call successors, (0), 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 22:52:08,434 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:52:08,434 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 119 [2021-12-17 22:52:08,434 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:52:09,587 INFO L129 PetriNetUnfolder]: 795/1701 cut-off events. [2021-12-17 22:52:09,587 INFO L130 PetriNetUnfolder]: For 987/987 co-relation queries the response was YES. [2021-12-17 22:52:09,591 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4086 conditions, 1701 events. 795/1701 cut-off events. For 987/987 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 10402 event pairs, 82 based on Foata normal form. 2/1696 useless extension candidates. Maximal degree in co-relation 3998. Up to 473 conditions per place. [2021-12-17 22:52:09,598 INFO L132 encePairwiseOnDemand]: 100/119 looper letters, 176 selfloop transitions, 65 changer transitions 8/301 dead transitions. [2021-12-17 22:52:09,599 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 301 transitions, 1424 flow [2021-12-17 22:52:09,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-17 22:52:09,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-17 22:52:09,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2469 transitions. [2021-12-17 22:52:09,606 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5607540313422666 [2021-12-17 22:52:09,606 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2469 transitions. [2021-12-17 22:52:09,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2469 transitions. [2021-12-17 22:52:09,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:52:09,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2469 transitions. [2021-12-17 22:52:09,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 66.72972972972973) internal successors, (2469), 37 states have internal predecessors, (2469), 0 states have call successors, (0), 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 22:52:09,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 119.0) internal successors, (4522), 38 states have internal predecessors, (4522), 0 states have call successors, (0), 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 22:52:09,621 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 119.0) internal successors, (4522), 38 states have internal predecessors, (4522), 0 states have call successors, (0), 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 22:52:09,621 INFO L186 Difference]: Start difference. First operand has 116 places, 105 transitions, 278 flow. Second operand 37 states and 2469 transitions. [2021-12-17 22:52:09,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 301 transitions, 1424 flow [2021-12-17 22:52:09,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 301 transitions, 1390 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-12-17 22:52:09,629 INFO L242 Difference]: Finished difference. Result has 164 places, 165 transitions, 737 flow [2021-12-17 22:52:09,630 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=737, PETRI_PLACES=164, PETRI_TRANSITIONS=165} [2021-12-17 22:52:09,630 INFO L334 CegarLoopForPetriNet]: 106 programPoint places, 58 predicate places. [2021-12-17 22:52:09,630 INFO L470 AbstractCegarLoop]: Abstraction has has 164 places, 165 transitions, 737 flow [2021-12-17 22:52:09,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 63.43478260869565) internal successors, (1459), 23 states have internal predecessors, (1459), 0 states have call successors, (0), 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 22:52:09,631 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:52:09,631 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] [2021-12-17 22:52:09,650 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 22:52:09,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:52:09,835 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:52:09,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:52:09,836 INFO L85 PathProgramCache]: Analyzing trace with hash 2137444122, now seen corresponding path program 2 times [2021-12-17 22:52:09,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:52:09,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913346810] [2021-12-17 22:52:09,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:09,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:52:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:10,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:52:10,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913346810] [2021-12-17 22:52:10,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913346810] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:52:10,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807306247] [2021-12-17 22:52:10,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 22:52:10,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:52:10,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:52:10,181 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 22:52:10,183 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 22:52:10,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 22:52:10,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:52:10,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-17 22:52:10,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:52:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:10,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:52:10,846 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 22:52:10,847 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 17 treesize of output 18 [2021-12-17 22:52:10,863 INFO L354 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2021-12-17 22:52:10,864 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 17 treesize of output 10 [2021-12-17 22:52:11,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:11,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807306247] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:52:11,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:52:11,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 10] total 23 [2021-12-17 22:52:11,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13952128] [2021-12-17 22:52:11,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:52:11,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-17 22:52:11,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:52:11,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-17 22:52:11,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-12-17 22:52:11,041 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 119 [2021-12-17 22:52:11,043 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 165 transitions, 737 flow. Second operand has 23 states, 23 states have (on average 63.56521739130435) internal successors, (1462), 23 states have internal predecessors, (1462), 0 states have call successors, (0), 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 22:52:11,043 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:52:11,043 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 119 [2021-12-17 22:52:11,043 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:52:12,597 INFO L129 PetriNetUnfolder]: 1520/3226 cut-off events. [2021-12-17 22:52:12,597 INFO L130 PetriNetUnfolder]: For 7175/7175 co-relation queries the response was YES. [2021-12-17 22:52:12,609 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9937 conditions, 3226 events. 1520/3226 cut-off events. For 7175/7175 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 23880 event pairs, 111 based on Foata normal form. 2/3221 useless extension candidates. Maximal degree in co-relation 9880. Up to 556 conditions per place. [2021-12-17 22:52:12,625 INFO L132 encePairwiseOnDemand]: 99/119 looper letters, 230 selfloop transitions, 128 changer transitions 8/418 dead transitions. [2021-12-17 22:52:12,626 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 418 transitions, 2732 flow [2021-12-17 22:52:12,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-17 22:52:12,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-12-17 22:52:12,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2890 transitions. [2021-12-17 22:52:12,634 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5647840531561462 [2021-12-17 22:52:12,634 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2890 transitions. [2021-12-17 22:52:12,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2890 transitions. [2021-12-17 22:52:12,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:52:12,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2890 transitions. [2021-12-17 22:52:12,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 67.20930232558139) internal successors, (2890), 43 states have internal predecessors, (2890), 0 states have call successors, (0), 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 22:52:12,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 119.0) internal successors, (5236), 44 states have internal predecessors, (5236), 0 states have call successors, (0), 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 22:52:12,657 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 119.0) internal successors, (5236), 44 states have internal predecessors, (5236), 0 states have call successors, (0), 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 22:52:12,657 INFO L186 Difference]: Start difference. First operand has 164 places, 165 transitions, 737 flow. Second operand 43 states and 2890 transitions. [2021-12-17 22:52:12,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 418 transitions, 2732 flow [2021-12-17 22:52:12,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 418 transitions, 2568 flow, removed 71 selfloop flow, removed 11 redundant places. [2021-12-17 22:52:12,722 INFO L242 Difference]: Finished difference. Result has 202 places, 254 transitions, 1697 flow [2021-12-17 22:52:12,723 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=1697, PETRI_PLACES=202, PETRI_TRANSITIONS=254} [2021-12-17 22:52:12,723 INFO L334 CegarLoopForPetriNet]: 106 programPoint places, 96 predicate places. [2021-12-17 22:52:12,724 INFO L470 AbstractCegarLoop]: Abstraction has has 202 places, 254 transitions, 1697 flow [2021-12-17 22:52:12,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 63.56521739130435) internal successors, (1462), 23 states have internal predecessors, (1462), 0 states have call successors, (0), 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 22:52:12,724 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:52:12,725 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] [2021-12-17 22:52:12,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 22:52:12,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:52:12,948 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:52:12,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:52:12,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1477858140, now seen corresponding path program 3 times [2021-12-17 22:52:12,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:52:12,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193684109] [2021-12-17 22:52:12,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:12,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:52:12,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:52:13,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:13,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:52:13,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193684109] [2021-12-17 22:52:13,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193684109] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:52:13,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796572270] [2021-12-17 22:52:13,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 22:52:13,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:52:13,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:52:13,354 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 22:52:13,386 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 22:52:13,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-17 22:52:13,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:52:13,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-17 22:52:13,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:52:13,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 22:52:13,981 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 22:52:14,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:14,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:52:14,339 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_151 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_151) c_~A~0.base) c_~A~0.offset) c_~counter~0)) (forall ((v_ArrVal_151 (Array Int Int))) (<= c_~counter~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_151) c_~A~0.base) c_~A~0.offset)))) is different from false [2021-12-17 22:52:14,376 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_151 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_151) c_~A~0.base) c_~A~0.offset) |c_thread1Thread1of1ForFork0_~tmp~0#1|)) (forall ((v_ArrVal_151 (Array Int Int))) (<= |c_thread1Thread1of1ForFork0_~tmp~0#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_151) c_~A~0.base) c_~A~0.offset)))) is different from false [2021-12-17 22:52:14,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 22:52:14,401 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 42 treesize of output 34 [2021-12-17 22:52:14,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-17 22:52:14,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 22:52:14,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 22:52:14,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 3 [2021-12-17 22:52:15,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:52:15,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796572270] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:52:15,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:52:15,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 39 [2021-12-17 22:52:15,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042489035] [2021-12-17 22:52:15,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:52:15,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-17 22:52:15,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:52:15,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-17 22:52:15,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1204, Unknown=2, NotChecked=142, Total=1482 [2021-12-17 22:52:15,012 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 119 [2021-12-17 22:52:15,014 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 254 transitions, 1697 flow. Second operand has 39 states, 39 states have (on average 57.743589743589745) internal successors, (2252), 39 states have internal predecessors, (2252), 0 states have call successors, (0), 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 22:52:15,014 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:52:15,014 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 119 [2021-12-17 22:52:15,014 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:52:17,410 INFO L129 PetriNetUnfolder]: 2226/4677 cut-off events. [2021-12-17 22:52:17,411 INFO L130 PetriNetUnfolder]: For 16292/16300 co-relation queries the response was YES. [2021-12-17 22:52:17,431 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16215 conditions, 4677 events. 2226/4677 cut-off events. For 16292/16300 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 37813 event pairs, 92 based on Foata normal form. 8/4676 useless extension candidates. Maximal degree in co-relation 16132. Up to 893 conditions per place. [2021-12-17 22:52:17,457 INFO L132 encePairwiseOnDemand]: 99/119 looper letters, 255 selfloop transitions, 181 changer transitions 8/493 dead transitions. [2021-12-17 22:52:17,457 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 493 transitions, 3983 flow [2021-12-17 22:52:17,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-17 22:52:17,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-12-17 22:52:17,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2731 transitions. [2021-12-17 22:52:17,462 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.521581359816654 [2021-12-17 22:52:17,463 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2731 transitions. [2021-12-17 22:52:17,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2731 transitions. [2021-12-17 22:52:17,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:52:17,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2731 transitions. [2021-12-17 22:52:17,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 62.06818181818182) internal successors, (2731), 44 states have internal predecessors, (2731), 0 states have call successors, (0), 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 22:52:17,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 119.0) internal successors, (5355), 45 states have internal predecessors, (5355), 0 states have call successors, (0), 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 22:52:17,481 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 119.0) internal successors, (5355), 45 states have internal predecessors, (5355), 0 states have call successors, (0), 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 22:52:17,481 INFO L186 Difference]: Start difference. First operand has 202 places, 254 transitions, 1697 flow. Second operand 44 states and 2731 transitions. [2021-12-17 22:52:17,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 493 transitions, 3983 flow [2021-12-17 22:52:17,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 493 transitions, 3358 flow, removed 294 selfloop flow, removed 15 redundant places. [2021-12-17 22:52:17,623 INFO L242 Difference]: Finished difference. Result has 237 places, 329 transitions, 2397 flow [2021-12-17 22:52:17,623 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=1381, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=2397, PETRI_PLACES=237, PETRI_TRANSITIONS=329} [2021-12-17 22:52:17,625 INFO L334 CegarLoopForPetriNet]: 106 programPoint places, 131 predicate places. [2021-12-17 22:52:17,625 INFO L470 AbstractCegarLoop]: Abstraction has has 237 places, 329 transitions, 2397 flow [2021-12-17 22:52:17,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 57.743589743589745) internal successors, (2252), 39 states have internal predecessors, (2252), 0 states have call successors, (0), 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 22:52:17,626 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:52:17,626 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] [2021-12-17 22:52:17,654 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 22:52:17,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:52:17,851 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:52:17,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:52:17,852 INFO L85 PathProgramCache]: Analyzing trace with hash 639403628, now seen corresponding path program 4 times [2021-12-17 22:52:17,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:52:17,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983208207] [2021-12-17 22:52:17,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:52:17,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:52:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 22:52:17,881 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-17 22:52:17,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 22:52:17,943 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-17 22:52:17,943 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-17 22:52:17,944 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2021-12-17 22:52:17,946 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2021-12-17 22:52:17,946 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2021-12-17 22:52:17,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 22:52:17,949 INFO L732 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1] [2021-12-17 22:52:17,953 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-12-17 22:52:17,953 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 22:52:18,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 10:52:18 BasicIcfg [2021-12-17 22:52:18,046 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 22:52:18,047 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 22:52:18,047 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 22:52:18,047 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 22:52:18,048 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:52:03" (3/4) ... [2021-12-17 22:52:18,049 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-17 22:52:18,133 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-17 22:52:18,136 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 22:52:18,136 INFO L158 Benchmark]: Toolchain (without parser) took 15580.65ms. Allocated memory was 81.8MB in the beginning and 247.5MB in the end (delta: 165.7MB). Free memory was 51.4MB in the beginning and 95.8MB in the end (delta: -44.5MB). Peak memory consumption was 122.3MB. Max. memory is 16.1GB. [2021-12-17 22:52:18,137 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 81.8MB. Free memory was 40.3MB in the beginning and 40.2MB in the end (delta: 48.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 22:52:18,137 INFO L158 Benchmark]: CACSL2BoogieTranslator took 316.44ms. Allocated memory was 81.8MB in the beginning and 98.6MB in the end (delta: 16.8MB). Free memory was 51.4MB in the beginning and 74.4MB in the end (delta: -23.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-17 22:52:18,138 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.50ms. Allocated memory is still 98.6MB. Free memory was 74.4MB in the beginning and 72.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 22:52:18,138 INFO L158 Benchmark]: Boogie Preprocessor took 49.84ms. Allocated memory is still 98.6MB. Free memory was 72.3MB in the beginning and 71.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 22:52:18,138 INFO L158 Benchmark]: RCFGBuilder took 479.03ms. Allocated memory is still 98.6MB. Free memory was 71.2MB in the beginning and 50.8MB in the end (delta: 20.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-12-17 22:52:18,139 INFO L158 Benchmark]: TraceAbstraction took 14591.35ms. Allocated memory was 98.6MB in the beginning and 247.5MB in the end (delta: 148.9MB). Free memory was 50.2MB in the beginning and 112.6MB in the end (delta: -62.4MB). Peak memory consumption was 89.7MB. Max. memory is 16.1GB. [2021-12-17 22:52:18,139 INFO L158 Benchmark]: Witness Printer took 88.86ms. Allocated memory is still 247.5MB. Free memory was 112.6MB in the beginning and 95.8MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-12-17 22:52:18,141 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 81.8MB. Free memory was 40.3MB in the beginning and 40.2MB in the end (delta: 48.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 316.44ms. Allocated memory was 81.8MB in the beginning and 98.6MB in the end (delta: 16.8MB). Free memory was 51.4MB in the beginning and 74.4MB in the end (delta: -23.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.50ms. Allocated memory is still 98.6MB. Free memory was 74.4MB in the beginning and 72.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.84ms. Allocated memory is still 98.6MB. Free memory was 72.3MB in the beginning and 71.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 479.03ms. Allocated memory is still 98.6MB. Free memory was 71.2MB in the beginning and 50.8MB in the end (delta: 20.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 14591.35ms. Allocated memory was 98.6MB in the beginning and 247.5MB in the end (delta: 148.9MB). Free memory was 50.2MB in the beginning and 112.6MB in the end (delta: -62.4MB). Peak memory consumption was 89.7MB. Max. memory is 16.1GB. * Witness Printer took 88.86ms. Allocated memory is still 247.5MB. Free memory was 112.6MB in the beginning and 95.8MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 87]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L41] 0 int* A; VAL [A={0:0}] [L42] 0 int counter, N; VAL [A={0:0}, counter=0, N=0] [L75] 0 pthread_t t1, t2; VAL [A={0:0}, counter=0, N=0, t1={6:0}, t2={5:0}] [L77] 0 N = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, A={0:0}, counter=0, N=1, t1={6:0}, t2={5:0}] [L78] CALL, EXPR 0 create_fresh_int_array(N) [L93] CALL 0 assume_abort_if_not(size >= 0) [L38] COND FALSE 0 !(!cond) VAL [\old(cond)=1, A={0:0}, cond=1, counter=0, N=1] [L93] RET 0 assume_abort_if_not(size >= 0) [L94] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L38] COND FALSE 0 !(!cond) VAL [\old(cond)=1, A={0:0}, cond=1, counter=0, N=1] [L94] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L96] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); VAL [\old(size)=1, A={0:0}, arr={3:0}, counter=0, malloc(sizeof(int) * (size_t)size)={3:0}, N=1, size=1] [L97] 0 int i = 0; VAL [\old(size)=1, A={0:0}, arr={3:0}, counter=0, i=0, N=1, size=1] [L97] COND TRUE 0 i < size VAL [\old(size)=1, A={0:0}, arr={3:0}, counter=0, i=0, N=1, size=1] [L98] 0 arr[i] = __VERIFIER_nondet_int() VAL [\old(size)=1, __VERIFIER_nondet_int()=-4, A={0:0}, arr={3:0}, counter=0, i=0, N=1, size=1] [L97] 0 i++ VAL [\old(size)=1, A={0:0}, arr={3:0}, counter=0, i=1, N=1, size=1] [L97] COND FALSE 0 !(i < size) VAL [\old(size)=1, A={0:0}, arr={3:0}, counter=0, i=1, N=1, size=1] [L100] 0 return arr; VAL [\old(size)=1, \result={3:0}, A={0:0}, arr={3:0}, counter=0, i=1, N=1, size=1] [L78] RET, EXPR 0 create_fresh_int_array(N) [L78] 0 A = create_fresh_int_array(N) VAL [A={3:0}, counter=0, create_fresh_int_array(N)={3:0}, N=1, t1={6:0}, t2={5:0}] [L81] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [A={3:0}, counter=0, N=1, pthread_create(&t1, 0, thread1, 0)=-2, t1={6:0}, t2={5:0}] [L49] 1 int i=0; VAL [A={3:0}, counter=0, i=0, N=1] [L49] COND TRUE 1 i= 0 || a >= -2147483648 - b) [L38] COND FALSE 1 !(!cond) [L110] RET 1 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L111] CALL 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L38] COND FALSE 1 !(!cond) [L111] RET 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L112] 1 return a + b; [L51] RET, EXPR 1 plus(counter, A[i]) [L51] 1 int tmp = plus(counter, A[i]); [L62] 2 int i=0; VAL [A={3:0}, counter=0, i=0, N=1] [L62] COND TRUE 2 i= b - 2147483648) [L38] COND FALSE 2 !(!cond) [L104] RET 2 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L105] CALL 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L38] COND FALSE 2 !(!cond) [L105] RET 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L106] 2 return a - b; [L64] RET, EXPR 2 minus(counter, A[i]) [L64] 2 int tmp = minus(counter, A[i]); [L67] 2 counter = tmp VAL [A={3:0}, counter=4, i=0, N=1, tmp=4] [L62] 2 i++ VAL [A={3:0}, counter=4, i=1, N=1, tmp=4] [L62] COND FALSE 2 !(i