./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-horseshoe.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-horseshoe.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 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 22:55:13,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 22:55:13,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 22:55:14,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 22:55:14,019 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 22:55:14,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 22:55:14,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 22:55:14,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 22:55:14,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 22:55:14,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 22:55:14,030 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 22:55:14,031 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 22:55:14,031 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 22:55:14,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 22:55:14,032 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 22:55:14,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 22:55:14,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 22:55:14,034 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 22:55:14,035 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 22:55:14,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 22:55:14,037 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 22:55:14,038 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 22:55:14,039 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 22:55:14,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 22:55:14,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 22:55:14,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 22:55:14,041 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 22:55:14,042 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 22:55:14,042 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 22:55:14,042 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 22:55:14,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 22:55:14,043 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 22:55:14,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 22:55:14,044 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 22:55:14,045 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 22:55:14,045 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 22:55:14,045 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 22:55:14,045 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 22:55:14,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 22:55:14,046 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 22:55:14,047 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 22:55:14,048 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 22:55:14,064 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 22:55:14,064 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 22:55:14,064 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 22:55:14,064 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 22:55:14,065 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 22:55:14,065 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 22:55:14,065 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 22:55:14,066 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 22:55:14,066 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 22:55:14,066 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 22:55:14,066 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 22:55:14,066 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 22:55:14,066 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 22:55:14,066 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 22:55:14,067 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 22:55:14,067 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 22:55:14,067 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 22:55:14,067 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 22:55:14,067 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 22:55:14,067 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 22:55:14,068 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 22:55:14,068 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 22:55:14,068 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 22:55:14,068 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 22:55:14,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 22:55:14,068 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 22:55:14,068 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 22:55:14,069 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 22:55:14,069 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 22:55:14,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 22:55:14,069 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 22:55:14,069 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 22:55:14,069 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 22:55:14,070 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 22:55:14,070 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a1ebdea5e08fe7fb177f9715317eb0e1f1a80d35c0ea62e77ce19d6486e2cb1 [2021-12-17 22:55:14,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 22:55:14,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 22:55:14,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 22:55:14,274 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 22:55:14,275 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 22:55:14,276 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c [2021-12-17 22:55:14,335 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff882c065/be48641488b74572bfc4ea04f7f9b28f/FLAG0f1c5d62b [2021-12-17 22:55:14,746 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 22:55:14,747 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c [2021-12-17 22:55:14,753 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff882c065/be48641488b74572bfc4ea04f7f9b28f/FLAG0f1c5d62b [2021-12-17 22:55:14,766 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff882c065/be48641488b74572bfc4ea04f7f9b28f [2021-12-17 22:55:14,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 22:55:14,769 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 22:55:14,770 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 22:55:14,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 22:55:14,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 22:55:14,774 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 10:55:14" (1/1) ... [2021-12-17 22:55:14,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@696f8a37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:55:14, skipping insertion in model container [2021-12-17 22:55:14,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 10:55:14" (1/1) ... [2021-12-17 22:55:14,780 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 22:55:14,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 22:55:14,963 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-horseshoe.wvr.c[3424,3437] [2021-12-17 22:55:14,968 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 22:55:14,973 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 22:55:14,990 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-horseshoe.wvr.c[3424,3437] [2021-12-17 22:55:14,992 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 22:55:15,001 INFO L208 MainTranslator]: Completed translation [2021-12-17 22:55:15,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:55:15 WrapperNode [2021-12-17 22:55:15,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 22:55:15,003 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 22:55:15,003 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 22:55:15,003 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 22:55:15,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:55:15" (1/1) ... [2021-12-17 22:55:15,015 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:55:15" (1/1) ... [2021-12-17 22:55:15,035 INFO L137 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 245 [2021-12-17 22:55:15,036 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 22:55:15,036 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 22:55:15,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 22:55:15,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 22:55:15,048 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:55:15" (1/1) ... [2021-12-17 22:55:15,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:55:15" (1/1) ... [2021-12-17 22:55:15,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:55:15" (1/1) ... [2021-12-17 22:55:15,060 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:55:15" (1/1) ... [2021-12-17 22:55:15,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:55:15" (1/1) ... [2021-12-17 22:55:15,078 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:55:15" (1/1) ... [2021-12-17 22:55:15,080 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:55:15" (1/1) ... [2021-12-17 22:55:15,082 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 22:55:15,085 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 22:55:15,085 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 22:55:15,085 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 22:55:15,086 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:55:15" (1/1) ... [2021-12-17 22:55:15,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 22:55:15,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:55:15,109 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 22:55:15,111 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 22:55:15,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 22:55:15,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 22:55:15,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 22:55:15,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 22:55:15,137 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-17 22:55:15,137 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-17 22:55:15,137 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-17 22:55:15,137 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-17 22:55:15,137 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-12-17 22:55:15,137 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-12-17 22:55:15,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 22:55:15,137 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-17 22:55:15,137 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-17 22:55:15,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 22:55:15,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 22:55:15,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 22:55:15,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 22:55:15,138 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 22:55:15,202 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 22:55:15,203 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 22:55:15,453 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 22:55:15,542 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 22:55:15,543 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-17 22:55:15,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:55:15 BoogieIcfgContainer [2021-12-17 22:55:15,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 22:55:15,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 22:55:15,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 22:55:15,548 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 22:55:15,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 10:55:14" (1/3) ... [2021-12-17 22:55:15,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d1e2486 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 10:55:15, skipping insertion in model container [2021-12-17 22:55:15,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:55:15" (2/3) ... [2021-12-17 22:55:15,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d1e2486 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 10:55:15, skipping insertion in model container [2021-12-17 22:55:15,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:55:15" (3/3) ... [2021-12-17 22:55:15,550 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-horseshoe.wvr.c [2021-12-17 22:55:15,554 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-17 22:55:15,554 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 22:55:15,554 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 22:55:15,554 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-17 22:55:15,587 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,587 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,587 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,587 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,587 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,587 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,588 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,588 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,588 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,588 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,588 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,588 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,589 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,589 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,589 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,589 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,589 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,590 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,590 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,590 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,590 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,590 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,591 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,591 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,591 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,591 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,591 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,591 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,591 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,591 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,591 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,592 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,592 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,592 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,592 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,592 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,592 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,592 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,592 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,592 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,593 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,593 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,593 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,593 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,593 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,593 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,593 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,593 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,593 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,593 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,594 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,594 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,594 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,594 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,594 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,595 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,595 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,595 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,595 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,596 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,596 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,596 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,596 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,596 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,596 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,597 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,597 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,597 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,597 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,597 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,598 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,598 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,598 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,598 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,598 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,598 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,599 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,599 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,601 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,601 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,601 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,601 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,601 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,601 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,602 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,602 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,602 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,606 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,606 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,606 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,609 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,609 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,609 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,609 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,609 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,610 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,610 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,610 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,611 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,611 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,611 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,611 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,611 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,611 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,611 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,611 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,611 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,612 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,612 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,612 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,612 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,612 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,612 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,612 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,612 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,612 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:55:15,614 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-12-17 22:55:15,643 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 22:55:15,649 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 22:55:15,649 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-17 22:55:15,659 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 203 places, 211 transitions, 446 flow [2021-12-17 22:55:15,707 INFO L129 PetriNetUnfolder]: 18/208 cut-off events. [2021-12-17 22:55:15,707 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-17 22:55:15,711 INFO L84 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 208 events. 18/208 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 113 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 170. Up to 3 conditions per place. [2021-12-17 22:55:15,711 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 211 transitions, 446 flow [2021-12-17 22:55:15,715 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 197 transitions, 412 flow [2021-12-17 22:55:15,754 INFO L129 PetriNetUnfolder]: 18/196 cut-off events. [2021-12-17 22:55:15,754 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-17 22:55:15,754 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:55:15,755 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:55:15,755 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 22:55:15,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:55:15,759 INFO L85 PathProgramCache]: Analyzing trace with hash -946407350, now seen corresponding path program 1 times [2021-12-17 22:55:15,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:55:15,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111063992] [2021-12-17 22:55:15,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:55:15,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:55:15,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:55:15,992 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 22:55:15,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:55:15,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111063992] [2021-12-17 22:55:15,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111063992] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:55:15,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:55:15,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 22:55:15,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561732817] [2021-12-17 22:55:15,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:55:16,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 22:55:16,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:55:16,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 22:55:16,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 22:55:16,028 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 211 [2021-12-17 22:55:16,034 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 197 transitions, 412 flow. Second operand has 2 states, 2 states have (on average 192.0) internal successors, (384), 2 states have internal predecessors, (384), 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 22:55:16,034 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:55:16,034 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 211 [2021-12-17 22:55:16,035 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:55:16,127 INFO L129 PetriNetUnfolder]: 71/370 cut-off events. [2021-12-17 22:55:16,128 INFO L130 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2021-12-17 22:55:16,131 INFO L84 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 370 events. 71/370 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1031 event pairs, 38 based on Foata normal form. 60/393 useless extension candidates. Maximal degree in co-relation 331. Up to 106 conditions per place. [2021-12-17 22:55:16,134 INFO L132 encePairwiseOnDemand]: 198/211 looper letters, 11 selfloop transitions, 0 changer transitions 6/184 dead transitions. [2021-12-17 22:55:16,134 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 184 transitions, 408 flow [2021-12-17 22:55:16,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 22:55:16,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-17 22:55:16,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 396 transitions. [2021-12-17 22:55:16,158 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9383886255924171 [2021-12-17 22:55:16,158 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 396 transitions. [2021-12-17 22:55:16,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 396 transitions. [2021-12-17 22:55:16,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:55:16,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 396 transitions. [2021-12-17 22:55:16,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 198.0) internal successors, (396), 2 states have internal predecessors, (396), 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 22:55:16,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 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 22:55:16,172 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 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 22:55:16,173 INFO L186 Difference]: Start difference. First operand has 189 places, 197 transitions, 412 flow. Second operand 2 states and 396 transitions. [2021-12-17 22:55:16,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 184 transitions, 408 flow [2021-12-17 22:55:16,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 184 transitions, 396 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-12-17 22:55:16,184 INFO L242 Difference]: Finished difference. Result has 184 places, 178 transitions, 362 flow [2021-12-17 22:55:16,185 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=362, PETRI_PLACES=184, PETRI_TRANSITIONS=178} [2021-12-17 22:55:16,188 INFO L334 CegarLoopForPetriNet]: 189 programPoint places, -5 predicate places. [2021-12-17 22:55:16,188 INFO L470 AbstractCegarLoop]: Abstraction has has 184 places, 178 transitions, 362 flow [2021-12-17 22:55:16,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 192.0) internal successors, (384), 2 states have internal predecessors, (384), 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 22:55:16,189 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:55:16,189 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:55:16,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 22:55:16,190 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 22:55:16,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:55:16,190 INFO L85 PathProgramCache]: Analyzing trace with hash 2064761234, now seen corresponding path program 1 times [2021-12-17 22:55:16,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:55:16,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954214865] [2021-12-17 22:55:16,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:55:16,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:55:16,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:55:16,389 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 22:55:16,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:55:16,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954214865] [2021-12-17 22:55:16,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954214865] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:55:16,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:55:16,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 22:55:16,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576974025] [2021-12-17 22:55:16,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:55:16,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 22:55:16,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:55:16,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 22:55:16,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 22:55:16,393 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 211 [2021-12-17 22:55:16,394 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 178 transitions, 362 flow. Second operand has 6 states, 6 states have (on average 164.66666666666666) internal successors, (988), 6 states have internal predecessors, (988), 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 22:55:16,394 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:55:16,394 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 211 [2021-12-17 22:55:16,394 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:55:16,612 INFO L129 PetriNetUnfolder]: 73/454 cut-off events. [2021-12-17 22:55:16,612 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2021-12-17 22:55:16,613 INFO L84 FinitePrefix]: Finished finitePrefix Result has 625 conditions, 454 events. 73/454 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1282 event pairs, 38 based on Foata normal form. 11/430 useless extension candidates. Maximal degree in co-relation 622. Up to 118 conditions per place. [2021-12-17 22:55:16,615 INFO L132 encePairwiseOnDemand]: 199/211 looper letters, 33 selfloop transitions, 8 changer transitions 17/199 dead transitions. [2021-12-17 22:55:16,615 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 199 transitions, 523 flow [2021-12-17 22:55:16,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 22:55:16,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-17 22:55:16,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1501 transitions. [2021-12-17 22:55:16,621 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7904160084254871 [2021-12-17 22:55:16,621 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1501 transitions. [2021-12-17 22:55:16,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1501 transitions. [2021-12-17 22:55:16,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:55:16,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1501 transitions. [2021-12-17 22:55:16,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 166.77777777777777) internal successors, (1501), 9 states have internal predecessors, (1501), 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 22:55:16,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 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 22:55:16,630 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 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 22:55:16,630 INFO L186 Difference]: Start difference. First operand has 184 places, 178 transitions, 362 flow. Second operand 9 states and 1501 transitions. [2021-12-17 22:55:16,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 199 transitions, 523 flow [2021-12-17 22:55:16,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 199 transitions, 523 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 22:55:16,637 INFO L242 Difference]: Finished difference. Result has 188 places, 179 transitions, 394 flow [2021-12-17 22:55:16,637 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=394, PETRI_PLACES=188, PETRI_TRANSITIONS=179} [2021-12-17 22:55:16,638 INFO L334 CegarLoopForPetriNet]: 189 programPoint places, -1 predicate places. [2021-12-17 22:55:16,638 INFO L470 AbstractCegarLoop]: Abstraction has has 188 places, 179 transitions, 394 flow [2021-12-17 22:55:16,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 164.66666666666666) internal successors, (988), 6 states have internal predecessors, (988), 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 22:55:16,639 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:55:16,639 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:55:16,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 22:55:16,639 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 22:55:16,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:55:16,641 INFO L85 PathProgramCache]: Analyzing trace with hash -962340754, now seen corresponding path program 1 times [2021-12-17 22:55:16,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:55:16,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819464174] [2021-12-17 22:55:16,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:55:16,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:55:16,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:55:16,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:55:16,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:55:16,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819464174] [2021-12-17 22:55:16,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819464174] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:55:16,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:55:16,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 22:55:16,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444951519] [2021-12-17 22:55:16,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:55:16,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 22:55:16,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:55:16,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 22:55:16,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 22:55:16,803 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 211 [2021-12-17 22:55:16,804 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 179 transitions, 394 flow. Second operand has 6 states, 6 states have (on average 165.33333333333334) internal successors, (992), 6 states have internal predecessors, (992), 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 22:55:16,804 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:55:16,804 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 211 [2021-12-17 22:55:16,804 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:55:16,946 INFO L129 PetriNetUnfolder]: 92/479 cut-off events. [2021-12-17 22:55:16,946 INFO L130 PetriNetUnfolder]: For 83/95 co-relation queries the response was YES. [2021-12-17 22:55:16,947 INFO L84 FinitePrefix]: Finished finitePrefix Result has 781 conditions, 479 events. 92/479 cut-off events. For 83/95 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1582 event pairs, 50 based on Foata normal form. 15/452 useless extension candidates. Maximal degree in co-relation 775. Up to 115 conditions per place. [2021-12-17 22:55:16,949 INFO L132 encePairwiseOnDemand]: 202/211 looper letters, 36 selfloop transitions, 6 changer transitions 8/191 dead transitions. [2021-12-17 22:55:16,949 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 191 transitions, 528 flow [2021-12-17 22:55:16,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 22:55:16,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-17 22:55:16,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1171 transitions. [2021-12-17 22:55:16,951 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7928232904536222 [2021-12-17 22:55:16,951 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1171 transitions. [2021-12-17 22:55:16,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1171 transitions. [2021-12-17 22:55:16,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:55:16,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1171 transitions. [2021-12-17 22:55:16,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 167.28571428571428) internal successors, (1171), 7 states have internal predecessors, (1171), 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 22:55:16,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 states have internal predecessors, (1688), 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 22:55:16,957 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 states have internal predecessors, (1688), 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 22:55:16,958 INFO L186 Difference]: Start difference. First operand has 188 places, 179 transitions, 394 flow. Second operand 7 states and 1171 transitions. [2021-12-17 22:55:16,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 191 transitions, 528 flow [2021-12-17 22:55:16,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 191 transitions, 514 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-12-17 22:55:16,964 INFO L242 Difference]: Finished difference. Result has 189 places, 180 transitions, 404 flow [2021-12-17 22:55:16,965 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=404, PETRI_PLACES=189, PETRI_TRANSITIONS=180} [2021-12-17 22:55:16,967 INFO L334 CegarLoopForPetriNet]: 189 programPoint places, 0 predicate places. [2021-12-17 22:55:16,967 INFO L470 AbstractCegarLoop]: Abstraction has has 189 places, 180 transitions, 404 flow [2021-12-17 22:55:16,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 165.33333333333334) internal successors, (992), 6 states have internal predecessors, (992), 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 22:55:16,968 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:55:16,968 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:55:16,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 22:55:16,968 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 22:55:16,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:55:16,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1984768583, now seen corresponding path program 1 times [2021-12-17 22:55:16,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:55:16,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121424257] [2021-12-17 22:55:16,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:55:16,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:55:17,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:55:17,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 22:55:17,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:55:17,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121424257] [2021-12-17 22:55:17,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121424257] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:55:17,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:55:17,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 22:55:17,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217709884] [2021-12-17 22:55:17,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:55:17,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 22:55:17,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:55:17,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 22:55:17,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 22:55:17,129 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 211 [2021-12-17 22:55:17,130 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 180 transitions, 404 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 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 22:55:17,130 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:55:17,130 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 211 [2021-12-17 22:55:17,130 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:55:17,183 INFO L129 PetriNetUnfolder]: 82/405 cut-off events. [2021-12-17 22:55:17,184 INFO L130 PetriNetUnfolder]: For 84/88 co-relation queries the response was YES. [2021-12-17 22:55:17,185 INFO L84 FinitePrefix]: Finished finitePrefix Result has 652 conditions, 405 events. 82/405 cut-off events. For 84/88 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1130 event pairs, 23 based on Foata normal form. 8/390 useless extension candidates. Maximal degree in co-relation 644. Up to 82 conditions per place. [2021-12-17 22:55:17,186 INFO L132 encePairwiseOnDemand]: 208/211 looper letters, 19 selfloop transitions, 2 changer transitions 0/186 dead transitions. [2021-12-17 22:55:17,186 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 186 transitions, 468 flow [2021-12-17 22:55:17,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 22:55:17,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-17 22:55:17,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 568 transitions. [2021-12-17 22:55:17,188 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8973143759873617 [2021-12-17 22:55:17,188 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 568 transitions. [2021-12-17 22:55:17,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 568 transitions. [2021-12-17 22:55:17,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:55:17,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 568 transitions. [2021-12-17 22:55:17,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 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 22:55:17,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 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 22:55:17,191 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 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 22:55:17,191 INFO L186 Difference]: Start difference. First operand has 189 places, 180 transitions, 404 flow. Second operand 3 states and 568 transitions. [2021-12-17 22:55:17,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 186 transitions, 468 flow [2021-12-17 22:55:17,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 186 transitions, 458 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-17 22:55:17,193 INFO L242 Difference]: Finished difference. Result has 187 places, 181 transitions, 408 flow [2021-12-17 22:55:17,194 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=408, PETRI_PLACES=187, PETRI_TRANSITIONS=181} [2021-12-17 22:55:17,194 INFO L334 CegarLoopForPetriNet]: 189 programPoint places, -2 predicate places. [2021-12-17 22:55:17,194 INFO L470 AbstractCegarLoop]: Abstraction has has 187 places, 181 transitions, 408 flow [2021-12-17 22:55:17,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 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 22:55:17,195 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:55:17,195 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:55:17,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 22:55:17,195 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 22:55:17,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:55:17,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1357111889, now seen corresponding path program 2 times [2021-12-17 22:55:17,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:55:17,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960721626] [2021-12-17 22:55:17,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:55:17,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:55:17,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:55:17,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 22:55:17,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:55:17,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960721626] [2021-12-17 22:55:17,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960721626] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:55:17,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:55:17,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 22:55:17,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398342337] [2021-12-17 22:55:17,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:55:17,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 22:55:17,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:55:17,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 22:55:17,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 22:55:17,317 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 211 [2021-12-17 22:55:17,317 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 181 transitions, 408 flow. Second operand has 4 states, 4 states have (on average 183.25) internal successors, (733), 4 states have internal predecessors, (733), 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 22:55:17,317 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:55:17,317 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 211 [2021-12-17 22:55:17,318 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:55:17,384 INFO L129 PetriNetUnfolder]: 58/347 cut-off events. [2021-12-17 22:55:17,384 INFO L130 PetriNetUnfolder]: For 89/97 co-relation queries the response was YES. [2021-12-17 22:55:17,385 INFO L84 FinitePrefix]: Finished finitePrefix Result has 576 conditions, 347 events. 58/347 cut-off events. For 89/97 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 818 event pairs, 9 based on Foata normal form. 2/326 useless extension candidates. Maximal degree in co-relation 567. Up to 90 conditions per place. [2021-12-17 22:55:17,386 INFO L132 encePairwiseOnDemand]: 205/211 looper letters, 18 selfloop transitions, 5 changer transitions 0/185 dead transitions. [2021-12-17 22:55:17,386 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 185 transitions, 468 flow [2021-12-17 22:55:17,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 22:55:17,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-17 22:55:17,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 739 transitions. [2021-12-17 22:55:17,388 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8755924170616114 [2021-12-17 22:55:17,388 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 739 transitions. [2021-12-17 22:55:17,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 739 transitions. [2021-12-17 22:55:17,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:55:17,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 739 transitions. [2021-12-17 22:55:17,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 184.75) internal successors, (739), 4 states have internal predecessors, (739), 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 22:55:17,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 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 22:55:17,391 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 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 22:55:17,391 INFO L186 Difference]: Start difference. First operand has 187 places, 181 transitions, 408 flow. Second operand 4 states and 739 transitions. [2021-12-17 22:55:17,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 185 transitions, 468 flow [2021-12-17 22:55:17,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 185 transitions, 460 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-12-17 22:55:17,395 INFO L242 Difference]: Finished difference. Result has 189 places, 183 transitions, 427 flow [2021-12-17 22:55:17,396 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=427, PETRI_PLACES=189, PETRI_TRANSITIONS=183} [2021-12-17 22:55:17,397 INFO L334 CegarLoopForPetriNet]: 189 programPoint places, 0 predicate places. [2021-12-17 22:55:17,397 INFO L470 AbstractCegarLoop]: Abstraction has has 189 places, 183 transitions, 427 flow [2021-12-17 22:55:17,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 183.25) internal successors, (733), 4 states have internal predecessors, (733), 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 22:55:17,398 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:55:17,398 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:55:17,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 22:55:17,398 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 22:55:17,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:55:17,399 INFO L85 PathProgramCache]: Analyzing trace with hash 2079583319, now seen corresponding path program 3 times [2021-12-17 22:55:17,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:55:17,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482981797] [2021-12-17 22:55:17,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:55:17,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:55:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:55:19,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:55:19,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:55:19,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482981797] [2021-12-17 22:55:19,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482981797] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:55:19,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236157168] [2021-12-17 22:55:19,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 22:55:19,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:55:19,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:55:19,992 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 22:55:20,020 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 22:55:20,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-12-17 22:55:20,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:55:20,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-17 22:55:20,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:55:21,534 INFO L354 Elim1Store]: treesize reduction 3, result has 85.0 percent of original size [2021-12-17 22:55:21,535 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 57 treesize of output 34 [2021-12-17 22:55:21,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 22:55:21,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 22:55:21,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236157168] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:55:21,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 22:55:21,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [38] total 46 [2021-12-17 22:55:21,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540830962] [2021-12-17 22:55:21,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:55:21,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 22:55:21,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:55:21,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 22:55:21,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1887, Unknown=0, NotChecked=0, Total=2070 [2021-12-17 22:55:21,645 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 211 [2021-12-17 22:55:21,646 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 183 transitions, 427 flow. Second operand has 14 states, 14 states have (on average 128.57142857142858) internal successors, (1800), 14 states have internal predecessors, (1800), 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 22:55:21,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:55:21,646 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 211 [2021-12-17 22:55:21,646 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:55:21,956 INFO L129 PetriNetUnfolder]: 1042/2221 cut-off events. [2021-12-17 22:55:21,956 INFO L130 PetriNetUnfolder]: For 1193/1253 co-relation queries the response was YES. [2021-12-17 22:55:21,961 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4878 conditions, 2221 events. 1042/2221 cut-off events. For 1193/1253 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 12764 event pairs, 238 based on Foata normal form. 1/2019 useless extension candidates. Maximal degree in co-relation 4869. Up to 839 conditions per place. [2021-12-17 22:55:21,970 INFO L132 encePairwiseOnDemand]: 189/211 looper letters, 135 selfloop transitions, 44 changer transitions 4/296 dead transitions. [2021-12-17 22:55:21,970 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 296 transitions, 1097 flow [2021-12-17 22:55:21,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 22:55:21,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-17 22:55:21,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1918 transitions. [2021-12-17 22:55:21,974 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6492890995260664 [2021-12-17 22:55:21,974 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1918 transitions. [2021-12-17 22:55:21,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1918 transitions. [2021-12-17 22:55:21,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:55:21,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1918 transitions. [2021-12-17 22:55:21,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 137.0) internal successors, (1918), 14 states have internal predecessors, (1918), 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 22:55:21,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 211.0) internal successors, (3165), 15 states have internal predecessors, (3165), 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 22:55:21,981 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 211.0) internal successors, (3165), 15 states have internal predecessors, (3165), 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 22:55:21,981 INFO L186 Difference]: Start difference. First operand has 189 places, 183 transitions, 427 flow. Second operand 14 states and 1918 transitions. [2021-12-17 22:55:21,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 296 transitions, 1097 flow [2021-12-17 22:55:21,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 296 transitions, 1090 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-17 22:55:21,986 INFO L242 Difference]: Finished difference. Result has 208 places, 222 transitions, 707 flow [2021-12-17 22:55:21,986 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=707, PETRI_PLACES=208, PETRI_TRANSITIONS=222} [2021-12-17 22:55:21,987 INFO L334 CegarLoopForPetriNet]: 189 programPoint places, 19 predicate places. [2021-12-17 22:55:21,987 INFO L470 AbstractCegarLoop]: Abstraction has has 208 places, 222 transitions, 707 flow [2021-12-17 22:55:21,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 128.57142857142858) internal successors, (1800), 14 states have internal predecessors, (1800), 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 22:55:21,988 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:55:21,988 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:55:22,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 22:55:22,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-17 22:55:22,206 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 22:55:22,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:55:22,207 INFO L85 PathProgramCache]: Analyzing trace with hash 937666923, now seen corresponding path program 4 times [2021-12-17 22:55:22,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:55:22,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938932558] [2021-12-17 22:55:22,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:55:22,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:55:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:55:24,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:55:24,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:55:24,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938932558] [2021-12-17 22:55:24,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938932558] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:55:24,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451257495] [2021-12-17 22:55:24,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 22:55:24,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:55:24,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:55:24,489 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 22:55:24,490 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 22:55:24,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 22:55:24,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:55:24,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-17 22:55:24,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:55:27,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 22:55:28,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 22:55:28,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 22:55:28,917 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 18 treesize of output 20 [2021-12-17 22:55:29,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 22:55:29,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 22:55:29,527 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-17 22:55:29,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 41 [2021-12-17 22:55:29,808 INFO L354 Elim1Store]: treesize reduction 3, result has 83.3 percent of original size [2021-12-17 22:55:29,808 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 43 treesize of output 30 [2021-12-17 22:55:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:55:30,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:55:30,300 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_176 (Array Int Int))) (< (+ (* 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_176) c_~q2~0.base) (+ c_~q2~0.offset (* c_~q2_front~0 4)))) (* 2 c_~t~0) 1) (+ c_~s~0 |c_thread2Thread1of1ForFork2_~j~0#1|))) (forall ((v_ArrVal_176 (Array Int Int))) (<= (+ c_~s~0 |c_thread2Thread1of1ForFork2_~j~0#1|) (+ (* 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_176) c_~q2~0.base) (+ c_~q2~0.offset (* c_~q2_front~0 4)))) (* 2 c_~t~0) 2)))) is different from false [2021-12-17 22:55:33,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 22:55:33,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 221 treesize of output 149 [2021-12-17 22:55:33,959 INFO L354 Elim1Store]: treesize reduction 20, result has 88.8 percent of original size [2021-12-17 22:55:33,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 12064 treesize of output 11118 [2021-12-17 22:55:34,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 22:55:34,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 11118 treesize of output 9534 [2021-12-17 22:55:34,099 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 22:55:34,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 9534 treesize of output 8808 [2021-12-17 22:55:34,195 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 7981 treesize of output 7213 [2021-12-17 22:55:34,244 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 7213 treesize of output 7021 [2021-12-17 22:55:34,285 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-17 22:55:34,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 22:55:34,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2021-12-17 22:55:34,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999107566] [2021-12-17 22:55:34,288 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 22:55:34,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-17 22:55:34,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:55:34,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-17 22:55:34,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=570, Invalid=7079, Unknown=11, NotChecked=172, Total=7832 [2021-12-17 22:55:34,304 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 211 [2021-12-17 22:55:34,308 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 222 transitions, 707 flow. Second operand has 39 states, 39 states have (on average 81.6923076923077) internal successors, (3186), 39 states have internal predecessors, (3186), 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 22:55:34,308 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:55:34,308 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 211 [2021-12-17 22:55:34,308 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:55:39,025 INFO L129 PetriNetUnfolder]: 1947/4176 cut-off events. [2021-12-17 22:55:39,025 INFO L130 PetriNetUnfolder]: For 8575/8703 co-relation queries the response was YES. [2021-12-17 22:55:39,033 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12682 conditions, 4176 events. 1947/4176 cut-off events. For 8575/8703 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 28065 event pairs, 351 based on Foata normal form. 20/3835 useless extension candidates. Maximal degree in co-relation 12665. Up to 1303 conditions per place. [2021-12-17 22:55:39,049 INFO L132 encePairwiseOnDemand]: 163/211 looper letters, 300 selfloop transitions, 76 changer transitions 4/450 dead transitions. [2021-12-17 22:55:39,050 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 450 transitions, 2512 flow [2021-12-17 22:55:39,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-17 22:55:39,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-12-17 22:55:39,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3927 transitions. [2021-12-17 22:55:39,058 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4045950958170204 [2021-12-17 22:55:39,058 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3927 transitions. [2021-12-17 22:55:39,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3927 transitions. [2021-12-17 22:55:39,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:55:39,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3927 transitions. [2021-12-17 22:55:39,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 85.3695652173913) internal successors, (3927), 46 states have internal predecessors, (3927), 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 22:55:39,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 211.0) internal successors, (9917), 47 states have internal predecessors, (9917), 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 22:55:39,078 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 211.0) internal successors, (9917), 47 states have internal predecessors, (9917), 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 22:55:39,078 INFO L186 Difference]: Start difference. First operand has 208 places, 222 transitions, 707 flow. Second operand 46 states and 3927 transitions. [2021-12-17 22:55:39,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 450 transitions, 2512 flow [2021-12-17 22:55:39,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 450 transitions, 2471 flow, removed 16 selfloop flow, removed 4 redundant places. [2021-12-17 22:55:39,094 INFO L242 Difference]: Finished difference. Result has 277 places, 283 transitions, 1304 flow [2021-12-17 22:55:39,094 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=1304, PETRI_PLACES=277, PETRI_TRANSITIONS=283} [2021-12-17 22:55:39,095 INFO L334 CegarLoopForPetriNet]: 189 programPoint places, 88 predicate places. [2021-12-17 22:55:39,095 INFO L470 AbstractCegarLoop]: Abstraction has has 277 places, 283 transitions, 1304 flow [2021-12-17 22:55:39,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 81.6923076923077) internal successors, (3186), 39 states have internal predecessors, (3186), 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 22:55:39,096 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:55:39,096 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:55:39,115 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 22:55:39,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-17 22:55:39,313 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 22:55:39,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:55:39,313 INFO L85 PathProgramCache]: Analyzing trace with hash 2113680597, now seen corresponding path program 5 times [2021-12-17 22:55:39,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:55:39,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27980699] [2021-12-17 22:55:39,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:55:39,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:55:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:55:41,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:55:41,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:55:41,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27980699] [2021-12-17 22:55:41,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27980699] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:55:41,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285364311] [2021-12-17 22:55:41,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 22:55:41,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:55:41,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:55:41,342 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 22:55:41,344 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 22:55:41,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 22:55:41,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:55:41,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-17 22:55:41,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:55:42,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 22:55:42,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 22:55:43,721 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-17 22:55:43,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 11 [2021-12-17 22:55:44,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 22:55:45,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 22:55:45,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 22:55:45,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 22:55:46,284 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 15 [2021-12-17 22:55:46,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:55:46,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:56:17,692 INFO L354 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2021-12-17 22:56:17,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 464 treesize of output 218 [2021-12-17 22:56:18,061 INFO L354 Elim1Store]: treesize reduction 20, result has 88.8 percent of original size [2021-12-17 22:56:18,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 39854 treesize of output 37308 [2021-12-17 22:56:18,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 22:56:18,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37128 treesize of output 29136 [2021-12-17 22:56:18,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 22:56:18,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 29040 treesize of output 27114 [2021-12-17 22:56:18,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 22:56:18,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27018 treesize of output 23070 Killed by 15