./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-deagle/floating_read-5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-deagle/floating_read-5.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2f28efd84e1dbcbcea7683bca483f8f3b9fbdd333eb36f517b9f12d5bccb885d --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:57:50,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:57:50,964 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:57:51,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:57:51,016 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:57:51,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:57:51,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:57:51,023 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:57:51,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:57:51,029 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:57:51,030 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:57:51,031 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:57:51,031 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:57:51,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:57:51,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:57:51,041 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:57:51,042 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:57:51,043 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:57:51,045 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:57:51,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:57:51,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:57:51,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:57:51,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:57:51,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:57:51,062 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:57:51,063 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:57:51,063 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:57:51,065 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:57:51,065 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:57:51,066 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:57:51,066 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:57:51,067 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:57:51,068 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:57:51,069 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:57:51,070 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:57:51,070 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:57:51,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:57:51,071 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:57:51,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:57:51,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:57:51,072 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:57:51,073 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:57:51,101 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:57:51,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:57:51,102 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:57:51,102 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:57:51,103 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:57:51,103 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:57:51,104 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:57:51,104 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:57:51,104 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:57:51,104 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:57:51,104 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:57:51,104 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:57:51,105 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:57:51,105 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:57:51,105 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:57:51,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:57:51,105 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:57:51,105 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:57:51,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:57:51,106 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:57:51,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:57:51,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:57:51,106 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:57:51,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:57:51,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:57:51,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:57:51,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:57:51,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:57:51,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:57:51,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:57:51,108 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:57:51,109 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:57:51,109 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:57:51,109 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:57:51,109 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f28efd84e1dbcbcea7683bca483f8f3b9fbdd333eb36f517b9f12d5bccb885d [2021-12-14 16:57:51,308 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:57:51,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:57:51,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:57:51,334 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:57:51,334 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:57:51,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-deagle/floating_read-5.i [2021-12-14 16:57:51,393 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3457f9a0/85a65a87911a4ee8bf11bc3eecfa53b1/FLAG89ba81e23 [2021-12-14 16:57:51,789 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:57:51,790 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/floating_read-5.i [2021-12-14 16:57:51,805 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3457f9a0/85a65a87911a4ee8bf11bc3eecfa53b1/FLAG89ba81e23 [2021-12-14 16:57:51,814 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3457f9a0/85a65a87911a4ee8bf11bc3eecfa53b1 [2021-12-14 16:57:51,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:57:51,816 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:57:51,817 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:57:51,817 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:57:51,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:57:51,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:57:51" (1/1) ... [2021-12-14 16:57:51,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37796d54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:57:51, skipping insertion in model container [2021-12-14 16:57:51,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:57:51" (1/1) ... [2021-12-14 16:57:51,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:57:51,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:57:52,089 WARN L1533 CHandler]: Possible shadowing of function thread [2021-12-14 16:57:52,098 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/floating_read-5.i[31193,31206] [2021-12-14 16:57:52,103 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:57:52,111 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:57:52,139 WARN L1533 CHandler]: Possible shadowing of function thread [2021-12-14 16:57:52,142 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/floating_read-5.i[31193,31206] [2021-12-14 16:57:52,143 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:57:52,163 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:57:52,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:57:52 WrapperNode [2021-12-14 16:57:52,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:57:52,164 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:57:52,165 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:57:52,165 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:57:52,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:57:52" (1/1) ... [2021-12-14 16:57:52,179 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:57:52" (1/1) ... [2021-12-14 16:57:52,195 INFO L137 Inliner]: procedures = 162, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 52 [2021-12-14 16:57:52,196 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:57:52,196 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:57:52,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:57:52,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:57:52,201 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:57:52" (1/1) ... [2021-12-14 16:57:52,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:57:52" (1/1) ... [2021-12-14 16:57:52,208 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:57:52" (1/1) ... [2021-12-14 16:57:52,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:57:52" (1/1) ... [2021-12-14 16:57:52,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:57:52" (1/1) ... [2021-12-14 16:57:52,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:57:52" (1/1) ... [2021-12-14 16:57:52,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:57:52" (1/1) ... [2021-12-14 16:57:52,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:57:52,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:57:52,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:57:52,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:57:52,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:57:52" (1/1) ... [2021-12-14 16:57:52,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:57:52,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:57:52,263 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) [2021-12-14 16:57:52,265 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 [2021-12-14 16:57:52,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 16:57:52,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 16:57:52,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-14 16:57:52,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:57:52,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 16:57:52,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 16:57:52,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:57:52,317 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-12-14 16:57:52,317 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-12-14 16:57:52,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-14 16:57:52,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:57:52,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:57:52,318 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-14 16:57:52,384 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:57:52,385 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:57:52,470 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:57:52,476 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:57:52,476 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-14 16:57:52,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:57:52 BoogieIcfgContainer [2021-12-14 16:57:52,478 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:57:52,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:57:52,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:57:52,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:57:52,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:57:51" (1/3) ... [2021-12-14 16:57:52,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47b2a6d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:57:52, skipping insertion in model container [2021-12-14 16:57:52,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:57:52" (2/3) ... [2021-12-14 16:57:52,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47b2a6d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:57:52, skipping insertion in model container [2021-12-14 16:57:52,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:57:52" (3/3) ... [2021-12-14 16:57:52,484 INFO L111 eAbstractionObserver]: Analyzing ICFG floating_read-5.i [2021-12-14 16:57:52,487 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-14 16:57:52,487 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:57:52,487 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 16:57:52,487 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-14 16:57:52,502 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:52,503 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:52,503 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:52,503 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:52,503 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:52,504 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:52,504 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:52,504 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:52,504 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:52,504 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:52,504 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:52,505 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:52,505 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:52,505 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:52,505 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:52,505 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:52,506 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:52,506 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:52,506 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:52,506 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:52,508 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:52,509 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:52,509 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:52,509 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:52,509 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:52,512 INFO L148 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-12-14 16:57:52,542 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:57:52,546 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 [2021-12-14 16:57:52,547 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 16:57:52,554 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 58 places, 59 transitions, 126 flow [2021-12-14 16:57:52,589 INFO L129 PetriNetUnfolder]: 7/81 cut-off events. [2021-12-14 16:57:52,593 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-12-14 16:57:52,596 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 81 events. 7/81 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 104 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 42. Up to 4 conditions per place. [2021-12-14 16:57:52,596 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 59 transitions, 126 flow [2021-12-14 16:57:52,601 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 40 transitions, 85 flow [2021-12-14 16:57:52,613 INFO L129 PetriNetUnfolder]: 1/25 cut-off events. [2021-12-14 16:57:52,613 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-14 16:57:52,613 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:52,613 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] [2021-12-14 16:57:52,614 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-14 16:57:52,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:52,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1781753840, now seen corresponding path program 1 times [2021-12-14 16:57:52,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:52,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214575814] [2021-12-14 16:57:52,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:52,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:52,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:57:52,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:57:52,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:57:52,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214575814] [2021-12-14 16:57:52,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214575814] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:57:52,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:57:52,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 16:57:52,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727613544] [2021-12-14 16:57:52,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:57:52,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 16:57:52,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:57:52,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 16:57:52,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 16:57:52,889 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 59 [2021-12-14 16:57:52,893 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 85 flow. Second operand has 2 states, 2 states have (on average 53.5) internal successors, (107), 2 states have internal predecessors, (107), 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) [2021-12-14 16:57:52,894 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:57:52,894 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 59 [2021-12-14 16:57:52,895 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:57:52,918 INFO L129 PetriNetUnfolder]: 0/46 cut-off events. [2021-12-14 16:57:52,918 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-12-14 16:57:52,919 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 46 events. 0/46 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 19 event pairs, 0 based on Foata normal form. 2/46 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-12-14 16:57:52,920 INFO L132 encePairwiseOnDemand]: 58/59 looper letters, 1 selfloop transitions, 0 changer transitions 0/39 dead transitions. [2021-12-14 16:57:52,920 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 39 transitions, 85 flow [2021-12-14 16:57:52,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 16:57:52,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-14 16:57:52,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 108 transitions. [2021-12-14 16:57:52,929 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9152542372881356 [2021-12-14 16:57:52,930 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 108 transitions. [2021-12-14 16:57:52,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 108 transitions. [2021-12-14 16:57:52,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:57:52,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 108 transitions. [2021-12-14 16:57:52,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 54.0) internal successors, (108), 2 states have internal predecessors, (108), 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) [2021-12-14 16:57:52,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 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) [2021-12-14 16:57:52,946 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 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) [2021-12-14 16:57:52,948 INFO L186 Difference]: Start difference. First operand has 42 places, 40 transitions, 85 flow. Second operand 2 states and 108 transitions. [2021-12-14 16:57:52,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 39 transitions, 85 flow [2021-12-14 16:57:52,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 85 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-14 16:57:52,952 INFO L242 Difference]: Finished difference. Result has 43 places, 39 transitions, 83 flow [2021-12-14 16:57:52,953 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=83, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2021-12-14 16:57:52,959 INFO L334 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2021-12-14 16:57:52,959 INFO L470 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 83 flow [2021-12-14 16:57:52,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 53.5) internal successors, (107), 2 states have internal predecessors, (107), 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) [2021-12-14 16:57:52,960 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:52,960 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] [2021-12-14 16:57:52,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:57:52,961 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-14 16:57:52,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:52,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1781754801, now seen corresponding path program 1 times [2021-12-14 16:57:52,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:52,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853846208] [2021-12-14 16:57:52,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:52,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:57:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:57:53,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:57:53,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853846208] [2021-12-14 16:57:53,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853846208] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:57:53,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:57:53,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:57:53,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297939906] [2021-12-14 16:57:53,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:57:53,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:57:53,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:57:53,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:57:53,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:57:53,015 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 59 [2021-12-14 16:57:53,015 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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) [2021-12-14 16:57:53,016 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:57:53,016 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 59 [2021-12-14 16:57:53,016 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:57:53,033 INFO L129 PetriNetUnfolder]: 0/43 cut-off events. [2021-12-14 16:57:53,035 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-14 16:57:53,035 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 43 events. 0/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 15 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-12-14 16:57:53,036 INFO L132 encePairwiseOnDemand]: 56/59 looper letters, 8 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2021-12-14 16:57:53,036 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 107 flow [2021-12-14 16:57:53,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:57:53,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-14 16:57:53,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 149 transitions. [2021-12-14 16:57:53,039 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8418079096045198 [2021-12-14 16:57:53,039 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 149 transitions. [2021-12-14 16:57:53,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 149 transitions. [2021-12-14 16:57:53,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:57:53,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 149 transitions. [2021-12-14 16:57:53,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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) [2021-12-14 16:57:53,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 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) [2021-12-14 16:57:53,044 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 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) [2021-12-14 16:57:53,045 INFO L186 Difference]: Start difference. First operand has 43 places, 39 transitions, 83 flow. Second operand 3 states and 149 transitions. [2021-12-14 16:57:53,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 107 flow [2021-12-14 16:57:53,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 107 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-14 16:57:53,048 INFO L242 Difference]: Finished difference. Result has 46 places, 39 transitions, 91 flow [2021-12-14 16:57:53,048 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2021-12-14 16:57:53,049 INFO L334 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2021-12-14 16:57:53,049 INFO L470 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 91 flow [2021-12-14 16:57:53,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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) [2021-12-14 16:57:53,050 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:53,050 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] [2021-12-14 16:57:53,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:57:53,050 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-14 16:57:53,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:53,051 INFO L85 PathProgramCache]: Analyzing trace with hash -315270955, now seen corresponding path program 1 times [2021-12-14 16:57:53,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:53,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671721960] [2021-12-14 16:57:53,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:53,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:53,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:57:53,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 16:57:53,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:57:53,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671721960] [2021-12-14 16:57:53,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671721960] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:57:53,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:57:53,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:57:53,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264725911] [2021-12-14 16:57:53,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:57:53,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:57:53,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:57:53,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:57:53,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:57:53,127 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 59 [2021-12-14 16:57:53,127 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 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) [2021-12-14 16:57:53,127 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:57:53,127 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 59 [2021-12-14 16:57:53,128 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:57:53,139 INFO L129 PetriNetUnfolder]: 0/43 cut-off events. [2021-12-14 16:57:53,139 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-14 16:57:53,139 INFO L84 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 43 events. 0/43 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 15 event pairs, 0 based on Foata normal form. 1/44 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-12-14 16:57:53,139 INFO L132 encePairwiseOnDemand]: 56/59 looper letters, 3 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2021-12-14 16:57:53,140 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 39 transitions, 101 flow [2021-12-14 16:57:53,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:57:53,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-14 16:57:53,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2021-12-14 16:57:53,141 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.847457627118644 [2021-12-14 16:57:53,141 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 150 transitions. [2021-12-14 16:57:53,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 150 transitions. [2021-12-14 16:57:53,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:57:53,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 150 transitions. [2021-12-14 16:57:53,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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) [2021-12-14 16:57:53,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 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) [2021-12-14 16:57:53,143 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 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) [2021-12-14 16:57:53,143 INFO L186 Difference]: Start difference. First operand has 46 places, 39 transitions, 91 flow. Second operand 3 states and 150 transitions. [2021-12-14 16:57:53,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 39 transitions, 101 flow [2021-12-14 16:57:53,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 39 transitions, 97 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-14 16:57:53,145 INFO L242 Difference]: Finished difference. Result has 47 places, 39 transitions, 95 flow [2021-12-14 16:57:53,145 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=95, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2021-12-14 16:57:53,146 INFO L334 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2021-12-14 16:57:53,146 INFO L470 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 95 flow [2021-12-14 16:57:53,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 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) [2021-12-14 16:57:53,146 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:53,146 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:57:53,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:57:53,147 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-14 16:57:53,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:53,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1968634815, now seen corresponding path program 1 times [2021-12-14 16:57:53,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:53,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947725776] [2021-12-14 16:57:53,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:53,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 16:57:53,162 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 16:57:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 16:57:53,183 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 16:57:53,183 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-14 16:57:53,184 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 2 remaining) [2021-12-14 16:57:53,185 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-14 16:57:53,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:57:53,188 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-12-14 16:57:53,189 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-12-14 16:57:53,189 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-12-14 16:57:53,194 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,194 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,194 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,195 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,195 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,195 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,195 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,195 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,195 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,195 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,196 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,196 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,196 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,196 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,196 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,196 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,197 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,197 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,197 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,197 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,197 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,198 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,198 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,198 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,198 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,198 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,198 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,198 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,199 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,199 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,199 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,199 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,199 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,199 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,199 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,200 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,200 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,200 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,200 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,200 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,201 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,201 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,201 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,201 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,201 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,202 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,202 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,202 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,202 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,203 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,204 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-14 16:57:53,205 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:57:53,206 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 [2021-12-14 16:57:53,206 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 16:57:53,207 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 66 places, 66 transitions, 150 flow [2021-12-14 16:57:53,217 INFO L129 PetriNetUnfolder]: 13/135 cut-off events. [2021-12-14 16:57:53,218 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-12-14 16:57:53,218 INFO L84 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 135 events. 13/135 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 236 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 83. Up to 8 conditions per place. [2021-12-14 16:57:53,219 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 66 transitions, 150 flow [2021-12-14 16:57:53,219 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 46 transitions, 104 flow [2021-12-14 16:57:53,221 INFO L129 PetriNetUnfolder]: 1/26 cut-off events. [2021-12-14 16:57:53,221 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-14 16:57:53,221 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:53,222 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] [2021-12-14 16:57:53,222 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-14 16:57:53,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:53,222 INFO L85 PathProgramCache]: Analyzing trace with hash 775346483, now seen corresponding path program 1 times [2021-12-14 16:57:53,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:53,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484058733] [2021-12-14 16:57:53,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:53,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:57:53,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:57:53,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:57:53,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484058733] [2021-12-14 16:57:53,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484058733] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:57:53,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:57:53,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:57:53,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562764865] [2021-12-14 16:57:53,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:57:53,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:57:53,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:57:53,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:57:53,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:57:53,243 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 66 [2021-12-14 16:57:53,243 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 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) [2021-12-14 16:57:53,244 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:57:53,244 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 66 [2021-12-14 16:57:53,244 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:57:53,259 INFO L129 PetriNetUnfolder]: 0/61 cut-off events. [2021-12-14 16:57:53,259 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-14 16:57:53,259 INFO L84 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 61 events. 0/61 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 32 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2021-12-14 16:57:53,260 INFO L132 encePairwiseOnDemand]: 62/66 looper letters, 11 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2021-12-14 16:57:53,260 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 49 transitions, 136 flow [2021-12-14 16:57:53,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:57:53,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-14 16:57:53,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 169 transitions. [2021-12-14 16:57:53,262 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8535353535353535 [2021-12-14 16:57:53,262 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 169 transitions. [2021-12-14 16:57:53,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 169 transitions. [2021-12-14 16:57:53,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:57:53,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 169 transitions. [2021-12-14 16:57:53,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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) [2021-12-14 16:57:53,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 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) [2021-12-14 16:57:53,263 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 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) [2021-12-14 16:57:53,264 INFO L186 Difference]: Start difference. First operand has 50 places, 46 transitions, 104 flow. Second operand 3 states and 169 transitions. [2021-12-14 16:57:53,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 49 transitions, 136 flow [2021-12-14 16:57:53,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 49 transitions, 134 flow, removed 1 selfloop flow, removed 0 redundant places. [2021-12-14 16:57:53,265 INFO L242 Difference]: Finished difference. Result has 53 places, 46 transitions, 112 flow [2021-12-14 16:57:53,265 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2021-12-14 16:57:53,266 INFO L334 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2021-12-14 16:57:53,266 INFO L470 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 112 flow [2021-12-14 16:57:53,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 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) [2021-12-14 16:57:53,266 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:53,267 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] [2021-12-14 16:57:53,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:57:53,267 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-14 16:57:53,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:53,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1083506660, now seen corresponding path program 1 times [2021-12-14 16:57:53,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:53,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834524464] [2021-12-14 16:57:53,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:53,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:57:53,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 16:57:53,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:57:53,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834524464] [2021-12-14 16:57:53,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834524464] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:57:53,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:57:53,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:57:53,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101782672] [2021-12-14 16:57:53,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:57:53,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:57:53,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:57:53,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:57:53,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:57:53,292 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 66 [2021-12-14 16:57:53,293 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 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) [2021-12-14 16:57:53,293 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:57:53,293 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 66 [2021-12-14 16:57:53,293 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:57:53,307 INFO L129 PetriNetUnfolder]: 4/87 cut-off events. [2021-12-14 16:57:53,307 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-12-14 16:57:53,308 INFO L84 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 87 events. 4/87 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 146 event pairs, 1 based on Foata normal form. 2/88 useless extension candidates. Maximal degree in co-relation 84. Up to 13 conditions per place. [2021-12-14 16:57:53,308 INFO L132 encePairwiseOnDemand]: 62/66 looper letters, 7 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2021-12-14 16:57:53,308 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 49 transitions, 143 flow [2021-12-14 16:57:53,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:57:53,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-14 16:57:53,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2021-12-14 16:57:53,309 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8434343434343434 [2021-12-14 16:57:53,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 167 transitions. [2021-12-14 16:57:53,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 167 transitions. [2021-12-14 16:57:53,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:57:53,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 167 transitions. [2021-12-14 16:57:53,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 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) [2021-12-14 16:57:53,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 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) [2021-12-14 16:57:53,311 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 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) [2021-12-14 16:57:53,311 INFO L186 Difference]: Start difference. First operand has 53 places, 46 transitions, 112 flow. Second operand 3 states and 167 transitions. [2021-12-14 16:57:53,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 49 transitions, 143 flow [2021-12-14 16:57:53,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 49 transitions, 141 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-14 16:57:53,313 INFO L242 Difference]: Finished difference. Result has 55 places, 48 transitions, 129 flow [2021-12-14 16:57:53,313 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2021-12-14 16:57:53,314 INFO L334 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2021-12-14 16:57:53,314 INFO L470 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 129 flow [2021-12-14 16:57:53,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 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) [2021-12-14 16:57:53,314 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:53,314 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] [2021-12-14 16:57:53,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 16:57:53,315 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-14 16:57:53,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:53,315 INFO L85 PathProgramCache]: Analyzing trace with hash -2017126046, now seen corresponding path program 1 times [2021-12-14 16:57:53,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:53,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281408070] [2021-12-14 16:57:53,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:53,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:53,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:57:53,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:57:53,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:57:53,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281408070] [2021-12-14 16:57:53,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281408070] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:57:53,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756799009] [2021-12-14 16:57:53,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:53,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:57:53,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:57:53,361 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) [2021-12-14 16:57:53,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 16:57:53,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:57:53,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 16:57:53,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:57:53,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:57:53,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:57:53,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:57:53,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756799009] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:57:53,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:57:53,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-14 16:57:53,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567108921] [2021-12-14 16:57:53,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:57:53,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:57:53,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:57:53,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:57:53,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:57:53,574 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 66 [2021-12-14 16:57:53,575 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 129 flow. Second operand has 10 states, 10 states have (on average 52.3) internal successors, (523), 10 states have internal predecessors, (523), 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) [2021-12-14 16:57:53,575 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:57:53,575 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 66 [2021-12-14 16:57:53,575 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:57:53,621 INFO L129 PetriNetUnfolder]: 1/59 cut-off events. [2021-12-14 16:57:53,621 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-14 16:57:53,621 INFO L84 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 59 events. 1/59 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 32 event pairs, 0 based on Foata normal form. 2/61 useless extension candidates. Maximal degree in co-relation 37. Up to 5 conditions per place. [2021-12-14 16:57:53,621 INFO L132 encePairwiseOnDemand]: 61/66 looper letters, 9 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2021-12-14 16:57:53,621 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 51 transitions, 163 flow [2021-12-14 16:57:53,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:57:53,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-14 16:57:53,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 468 transitions. [2021-12-14 16:57:53,623 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7878787878787878 [2021-12-14 16:57:53,623 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 468 transitions. [2021-12-14 16:57:53,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 468 transitions. [2021-12-14 16:57:53,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:57:53,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 468 transitions. [2021-12-14 16:57:53,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 52.0) internal successors, (468), 9 states have internal predecessors, (468), 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) [2021-12-14 16:57:53,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 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) [2021-12-14 16:57:53,625 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 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) [2021-12-14 16:57:53,625 INFO L186 Difference]: Start difference. First operand has 55 places, 48 transitions, 129 flow. Second operand 9 states and 468 transitions. [2021-12-14 16:57:53,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 51 transitions, 163 flow [2021-12-14 16:57:53,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 51 transitions, 160 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-14 16:57:53,627 INFO L242 Difference]: Finished difference. Result has 59 places, 47 transitions, 134 flow [2021-12-14 16:57:53,627 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=134, PETRI_PLACES=59, PETRI_TRANSITIONS=47} [2021-12-14 16:57:53,627 INFO L334 CegarLoopForPetriNet]: 50 programPoint places, 9 predicate places. [2021-12-14 16:57:53,627 INFO L470 AbstractCegarLoop]: Abstraction has has 59 places, 47 transitions, 134 flow [2021-12-14 16:57:53,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 52.3) internal successors, (523), 10 states have internal predecessors, (523), 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) [2021-12-14 16:57:53,628 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:53,628 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:57:53,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 16:57:53,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:57:53,845 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-14 16:57:53,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:53,846 INFO L85 PathProgramCache]: Analyzing trace with hash 286308789, now seen corresponding path program 1 times [2021-12-14 16:57:53,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:53,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450522365] [2021-12-14 16:57:53,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:53,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:53,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 16:57:53,867 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 16:57:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 16:57:53,880 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 16:57:53,881 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-14 16:57:53,881 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 2 remaining) [2021-12-14 16:57:53,881 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-14 16:57:53,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 16:57:53,881 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-12-14 16:57:53,881 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-12-14 16:57:53,882 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-12-14 16:57:53,887 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,887 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,887 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,887 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,887 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,887 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,887 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,887 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,887 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,887 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,887 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,888 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,888 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,888 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,888 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,888 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,888 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,888 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,888 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,888 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,888 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,888 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,888 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,888 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,888 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,889 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,889 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,889 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,889 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,889 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,889 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,889 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,889 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,889 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,889 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,889 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,889 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,889 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,889 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,889 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,889 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,890 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,890 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,890 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,890 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,890 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,890 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,890 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,890 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,890 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,890 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,890 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,890 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,890 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,890 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,890 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,890 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,890 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,891 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,891 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,891 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,891 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,891 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,891 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,891 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,891 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,892 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,892 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,892 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,892 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,892 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,892 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,892 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,892 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,892 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:53,893 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-12-14 16:57:53,894 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:57:53,894 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 [2021-12-14 16:57:53,895 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 16:57:53,895 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 74 places, 73 transitions, 176 flow [2021-12-14 16:57:53,919 INFO L129 PetriNetUnfolder]: 24/222 cut-off events. [2021-12-14 16:57:53,920 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2021-12-14 16:57:53,920 INFO L84 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 222 events. 24/222 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 498 event pairs, 1 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 143. Up to 16 conditions per place. [2021-12-14 16:57:53,920 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 73 transitions, 176 flow [2021-12-14 16:57:53,920 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 52 transitions, 125 flow [2021-12-14 16:57:53,922 INFO L129 PetriNetUnfolder]: 1/25 cut-off events. [2021-12-14 16:57:53,922 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-14 16:57:53,922 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:53,922 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] [2021-12-14 16:57:53,923 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-14 16:57:53,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:53,923 INFO L85 PathProgramCache]: Analyzing trace with hash 898626907, now seen corresponding path program 1 times [2021-12-14 16:57:53,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:53,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3695995] [2021-12-14 16:57:53,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:53,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:53,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:57:53,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:57:53,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:57:53,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3695995] [2021-12-14 16:57:53,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3695995] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:57:53,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:57:53,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 16:57:53,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306565405] [2021-12-14 16:57:53,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:57:53,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 16:57:53,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:57:53,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 16:57:53,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 16:57:53,940 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 73 [2021-12-14 16:57:53,940 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 125 flow. Second operand has 2 states, 2 states have (on average 63.5) internal successors, (127), 2 states have internal predecessors, (127), 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) [2021-12-14 16:57:53,940 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:57:53,940 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 73 [2021-12-14 16:57:53,940 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:57:53,953 INFO L129 PetriNetUnfolder]: 0/82 cut-off events. [2021-12-14 16:57:53,954 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2021-12-14 16:57:53,954 INFO L84 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 82 events. 0/82 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 4/82 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-12-14 16:57:53,954 INFO L132 encePairwiseOnDemand]: 72/73 looper letters, 3 selfloop transitions, 0 changer transitions 0/51 dead transitions. [2021-12-14 16:57:53,954 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 51 transitions, 129 flow [2021-12-14 16:57:53,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 16:57:53,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-14 16:57:53,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 130 transitions. [2021-12-14 16:57:53,955 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8904109589041096 [2021-12-14 16:57:53,955 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 130 transitions. [2021-12-14 16:57:53,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 130 transitions. [2021-12-14 16:57:53,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:57:53,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 130 transitions. [2021-12-14 16:57:53,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 65.0) internal successors, (130), 2 states have internal predecessors, (130), 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) [2021-12-14 16:57:53,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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) [2021-12-14 16:57:53,958 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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) [2021-12-14 16:57:53,958 INFO L186 Difference]: Start difference. First operand has 58 places, 52 transitions, 125 flow. Second operand 2 states and 130 transitions. [2021-12-14 16:57:53,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 51 transitions, 129 flow [2021-12-14 16:57:53,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 51 transitions, 123 flow, removed 3 selfloop flow, removed 0 redundant places. [2021-12-14 16:57:53,967 INFO L242 Difference]: Finished difference. Result has 59 places, 51 transitions, 117 flow [2021-12-14 16:57:53,967 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=117, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2021-12-14 16:57:53,968 INFO L334 CegarLoopForPetriNet]: 58 programPoint places, 1 predicate places. [2021-12-14 16:57:53,969 INFO L470 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 117 flow [2021-12-14 16:57:53,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 63.5) internal successors, (127), 2 states have internal predecessors, (127), 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) [2021-12-14 16:57:53,972 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:53,972 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] [2021-12-14 16:57:53,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 16:57:53,972 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-14 16:57:53,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:53,973 INFO L85 PathProgramCache]: Analyzing trace with hash 898627868, now seen corresponding path program 1 times [2021-12-14 16:57:53,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:53,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887421464] [2021-12-14 16:57:53,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:53,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:53,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:57:53,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:57:53,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:57:53,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887421464] [2021-12-14 16:57:53,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887421464] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:57:53,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:57:53,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:57:53,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225092030] [2021-12-14 16:57:53,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:57:53,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:57:53,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:57:53,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:57:53,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:57:53,989 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 73 [2021-12-14 16:57:53,989 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 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) [2021-12-14 16:57:53,989 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:57:53,989 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 73 [2021-12-14 16:57:53,989 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:57:54,004 INFO L129 PetriNetUnfolder]: 0/79 cut-off events. [2021-12-14 16:57:54,004 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-14 16:57:54,004 INFO L84 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 79 events. 0/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2021-12-14 16:57:54,004 INFO L132 encePairwiseOnDemand]: 70/73 looper letters, 12 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2021-12-14 16:57:54,004 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 55 transitions, 153 flow [2021-12-14 16:57:54,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:57:54,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-14 16:57:54,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2021-12-14 16:57:54,005 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8356164383561644 [2021-12-14 16:57:54,005 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 183 transitions. [2021-12-14 16:57:54,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 183 transitions. [2021-12-14 16:57:54,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:57:54,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 183 transitions. [2021-12-14 16:57:54,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 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) [2021-12-14 16:57:54,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 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) [2021-12-14 16:57:54,006 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 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) [2021-12-14 16:57:54,006 INFO L186 Difference]: Start difference. First operand has 59 places, 51 transitions, 117 flow. Second operand 3 states and 183 transitions. [2021-12-14 16:57:54,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 55 transitions, 153 flow [2021-12-14 16:57:54,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 55 transitions, 153 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-14 16:57:54,008 INFO L242 Difference]: Finished difference. Result has 62 places, 52 transitions, 129 flow [2021-12-14 16:57:54,008 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=62, PETRI_TRANSITIONS=52} [2021-12-14 16:57:54,008 INFO L334 CegarLoopForPetriNet]: 58 programPoint places, 4 predicate places. [2021-12-14 16:57:54,008 INFO L470 AbstractCegarLoop]: Abstraction has has 62 places, 52 transitions, 129 flow [2021-12-14 16:57:54,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 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) [2021-12-14 16:57:54,009 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:54,009 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] [2021-12-14 16:57:54,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 16:57:54,009 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-14 16:57:54,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:54,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1823512938, now seen corresponding path program 1 times [2021-12-14 16:57:54,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:54,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720435143] [2021-12-14 16:57:54,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:54,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:57:54,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 16:57:54,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:57:54,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720435143] [2021-12-14 16:57:54,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720435143] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:57:54,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:57:54,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:57:54,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34378419] [2021-12-14 16:57:54,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:57:54,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:57:54,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:57:54,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:57:54,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:57:54,027 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 73 [2021-12-14 16:57:54,028 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 52 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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) [2021-12-14 16:57:54,028 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:57:54,028 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 73 [2021-12-14 16:57:54,028 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:57:54,076 INFO L129 PetriNetUnfolder]: 21/177 cut-off events. [2021-12-14 16:57:54,076 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2021-12-14 16:57:54,077 INFO L84 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 177 events. 21/177 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 569 event pairs, 8 based on Foata normal form. 3/175 useless extension candidates. Maximal degree in co-relation 262. Up to 44 conditions per place. [2021-12-14 16:57:54,077 INFO L132 encePairwiseOnDemand]: 68/73 looper letters, 10 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2021-12-14 16:57:54,077 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 57 transitions, 177 flow [2021-12-14 16:57:54,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:57:54,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-14 16:57:54,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2021-12-14 16:57:54,078 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8356164383561644 [2021-12-14 16:57:54,078 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 183 transitions. [2021-12-14 16:57:54,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 183 transitions. [2021-12-14 16:57:54,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:57:54,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 183 transitions. [2021-12-14 16:57:54,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 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) [2021-12-14 16:57:54,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 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) [2021-12-14 16:57:54,079 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 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) [2021-12-14 16:57:54,080 INFO L186 Difference]: Start difference. First operand has 62 places, 52 transitions, 129 flow. Second operand 3 states and 183 transitions. [2021-12-14 16:57:54,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 57 transitions, 177 flow [2021-12-14 16:57:54,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 57 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-14 16:57:54,081 INFO L242 Difference]: Finished difference. Result has 64 places, 55 transitions, 153 flow [2021-12-14 16:57:54,081 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=153, PETRI_PLACES=64, PETRI_TRANSITIONS=55} [2021-12-14 16:57:54,081 INFO L334 CegarLoopForPetriNet]: 58 programPoint places, 6 predicate places. [2021-12-14 16:57:54,081 INFO L470 AbstractCegarLoop]: Abstraction has has 64 places, 55 transitions, 153 flow [2021-12-14 16:57:54,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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) [2021-12-14 16:57:54,082 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:54,082 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] [2021-12-14 16:57:54,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 16:57:54,082 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-14 16:57:54,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:54,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1587743943, now seen corresponding path program 1 times [2021-12-14 16:57:54,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:54,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582009061] [2021-12-14 16:57:54,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:54,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:57:54,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:57:54,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:57:54,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582009061] [2021-12-14 16:57:54,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582009061] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:57:54,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814933606] [2021-12-14 16:57:54,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:54,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:57:54,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:57:54,134 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) [2021-12-14 16:57:54,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 16:57:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:57:54,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 16:57:54,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:57:54,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:57:54,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:57:54,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:57:54,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814933606] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:57:54,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:57:54,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-14 16:57:54,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728081458] [2021-12-14 16:57:54,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:57:54,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:57:54,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:57:54,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:57:54,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:57:54,330 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 73 [2021-12-14 16:57:54,330 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 55 transitions, 153 flow. Second operand has 10 states, 10 states have (on average 57.3) internal successors, (573), 10 states have internal predecessors, (573), 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) [2021-12-14 16:57:54,330 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:57:54,331 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 73 [2021-12-14 16:57:54,331 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:57:54,392 INFO L129 PetriNetUnfolder]: 14/115 cut-off events. [2021-12-14 16:57:54,392 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-12-14 16:57:54,393 INFO L84 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 115 events. 14/115 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 231 event pairs, 6 based on Foata normal form. 2/112 useless extension candidates. Maximal degree in co-relation 184. Up to 29 conditions per place. [2021-12-14 16:57:54,393 INFO L132 encePairwiseOnDemand]: 67/73 looper letters, 13 selfloop transitions, 9 changer transitions 0/65 dead transitions. [2021-12-14 16:57:54,393 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 65 transitions, 219 flow [2021-12-14 16:57:54,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:57:54,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-14 16:57:54,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 519 transitions. [2021-12-14 16:57:54,395 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7899543378995434 [2021-12-14 16:57:54,395 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 519 transitions. [2021-12-14 16:57:54,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 519 transitions. [2021-12-14 16:57:54,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:57:54,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 519 transitions. [2021-12-14 16:57:54,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.666666666666664) internal successors, (519), 9 states have internal predecessors, (519), 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) [2021-12-14 16:57:54,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 73.0) internal successors, (730), 10 states have internal predecessors, (730), 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) [2021-12-14 16:57:54,397 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 73.0) internal successors, (730), 10 states have internal predecessors, (730), 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) [2021-12-14 16:57:54,397 INFO L186 Difference]: Start difference. First operand has 64 places, 55 transitions, 153 flow. Second operand 9 states and 519 transitions. [2021-12-14 16:57:54,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 65 transitions, 219 flow [2021-12-14 16:57:54,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 65 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-14 16:57:54,399 INFO L242 Difference]: Finished difference. Result has 74 places, 61 transitions, 199 flow [2021-12-14 16:57:54,399 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=199, PETRI_PLACES=74, PETRI_TRANSITIONS=61} [2021-12-14 16:57:54,400 INFO L334 CegarLoopForPetriNet]: 58 programPoint places, 16 predicate places. [2021-12-14 16:57:54,400 INFO L470 AbstractCegarLoop]: Abstraction has has 74 places, 61 transitions, 199 flow [2021-12-14 16:57:54,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 57.3) internal successors, (573), 10 states have internal predecessors, (573), 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) [2021-12-14 16:57:54,400 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:54,400 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:57:54,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 16:57:54,615 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,SelfDestructingSolverStorable11 [2021-12-14 16:57:54,616 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-14 16:57:54,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:54,616 INFO L85 PathProgramCache]: Analyzing trace with hash 176735389, now seen corresponding path program 1 times [2021-12-14 16:57:54,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:54,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897848818] [2021-12-14 16:57:54,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:54,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:54,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 16:57:54,628 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 16:57:54,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 16:57:54,640 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 16:57:54,640 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-14 16:57:54,640 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 2 remaining) [2021-12-14 16:57:54,640 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-14 16:57:54,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 16:57:54,641 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2021-12-14 16:57:54,641 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-12-14 16:57:54,641 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-12-14 16:57:54,647 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,647 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,647 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,647 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,647 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,647 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,648 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,648 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,648 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,648 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,648 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,648 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,648 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,648 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,648 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,649 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,649 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,649 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,649 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,649 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,649 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,649 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,649 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,649 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,650 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,650 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,650 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,650 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,650 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,650 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,650 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,650 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,650 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,650 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,651 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,651 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,651 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,651 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,651 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,651 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,651 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,651 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,652 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,652 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,652 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,652 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,652 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,652 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,652 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,652 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,652 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,652 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,653 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,653 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,653 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,653 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,653 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,653 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,653 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,653 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,653 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,654 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,654 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,654 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,654 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,654 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,654 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,654 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,654 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,654 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,655 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,655 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,655 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,655 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,655 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,655 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,655 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,655 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,655 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,656 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,656 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,656 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,656 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,656 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,656 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,657 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,657 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,657 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,657 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,657 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,657 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,658 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,658 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,658 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,658 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,658 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,658 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,658 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,658 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,659 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:57:54,660 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-12-14 16:57:54,660 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:57:54,661 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 [2021-12-14 16:57:54,661 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 16:57:54,662 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 82 places, 80 transitions, 204 flow [2021-12-14 16:57:54,679 INFO L129 PetriNetUnfolder]: 47/377 cut-off events. [2021-12-14 16:57:54,680 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2021-12-14 16:57:54,680 INFO L84 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 377 events. 47/377 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1165 event pairs, 6 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 242. Up to 32 conditions per place. [2021-12-14 16:57:54,680 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 80 transitions, 204 flow [2021-12-14 16:57:54,681 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 58 transitions, 148 flow [2021-12-14 16:57:54,682 INFO L129 PetriNetUnfolder]: 1/26 cut-off events. [2021-12-14 16:57:54,682 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-14 16:57:54,682 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:54,682 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] [2021-12-14 16:57:54,683 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-14 16:57:54,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:54,683 INFO L85 PathProgramCache]: Analyzing trace with hash -2143368340, now seen corresponding path program 1 times [2021-12-14 16:57:54,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:54,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438344812] [2021-12-14 16:57:54,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:54,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:57:54,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:57:54,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:57:54,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438344812] [2021-12-14 16:57:54,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438344812] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:57:54,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:57:54,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:57:54,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759780280] [2021-12-14 16:57:54,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:57:54,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:57:54,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:57:54,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:57:54,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:57:54,699 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 80 [2021-12-14 16:57:54,699 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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) [2021-12-14 16:57:54,699 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:57:54,699 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 80 [2021-12-14 16:57:54,699 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:57:54,718 INFO L129 PetriNetUnfolder]: 0/97 cut-off events. [2021-12-14 16:57:54,718 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-12-14 16:57:54,718 INFO L84 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 97 events. 0/97 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2021-12-14 16:57:54,719 INFO L132 encePairwiseOnDemand]: 76/80 looper letters, 13 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2021-12-14 16:57:54,719 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 61 transitions, 184 flow [2021-12-14 16:57:54,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:57:54,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-14 16:57:54,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 201 transitions. [2021-12-14 16:57:54,720 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8375 [2021-12-14 16:57:54,720 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 201 transitions. [2021-12-14 16:57:54,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 201 transitions. [2021-12-14 16:57:54,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:57:54,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 201 transitions. [2021-12-14 16:57:54,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 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) [2021-12-14 16:57:54,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 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) [2021-12-14 16:57:54,721 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 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) [2021-12-14 16:57:54,721 INFO L186 Difference]: Start difference. First operand has 66 places, 58 transitions, 148 flow. Second operand 3 states and 201 transitions. [2021-12-14 16:57:54,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 61 transitions, 184 flow [2021-12-14 16:57:54,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 61 transitions, 172 flow, removed 6 selfloop flow, removed 0 redundant places. [2021-12-14 16:57:54,723 INFO L242 Difference]: Finished difference. Result has 69 places, 58 transitions, 146 flow [2021-12-14 16:57:54,723 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2021-12-14 16:57:54,723 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2021-12-14 16:57:54,723 INFO L470 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 146 flow [2021-12-14 16:57:54,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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) [2021-12-14 16:57:54,724 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:54,724 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] [2021-12-14 16:57:54,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 16:57:54,724 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-14 16:57:54,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:54,724 INFO L85 PathProgramCache]: Analyzing trace with hash -184146753, now seen corresponding path program 1 times [2021-12-14 16:57:54,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:54,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016032303] [2021-12-14 16:57:54,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:54,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:54,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:57:54,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 16:57:54,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:57:54,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016032303] [2021-12-14 16:57:54,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016032303] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:57:54,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:57:54,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:57:54,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82527951] [2021-12-14 16:57:54,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:57:54,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:57:54,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:57:54,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:57:54,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:57:54,749 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 80 [2021-12-14 16:57:54,750 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 58 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 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) [2021-12-14 16:57:54,750 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:57:54,750 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 80 [2021-12-14 16:57:54,750 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:57:54,799 INFO L129 PetriNetUnfolder]: 73/359 cut-off events. [2021-12-14 16:57:54,799 INFO L130 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2021-12-14 16:57:54,800 INFO L84 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 359 events. 73/359 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1623 event pairs, 35 based on Foata normal form. 4/348 useless extension candidates. Maximal degree in co-relation 523. Up to 126 conditions per place. [2021-12-14 16:57:54,801 INFO L132 encePairwiseOnDemand]: 74/80 looper letters, 13 selfloop transitions, 5 changer transitions 0/65 dead transitions. [2021-12-14 16:57:54,801 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 65 transitions, 211 flow [2021-12-14 16:57:54,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:57:54,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-14 16:57:54,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 199 transitions. [2021-12-14 16:57:54,802 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8291666666666667 [2021-12-14 16:57:54,802 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 199 transitions. [2021-12-14 16:57:54,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 199 transitions. [2021-12-14 16:57:54,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:57:54,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 199 transitions. [2021-12-14 16:57:54,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 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) [2021-12-14 16:57:54,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 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) [2021-12-14 16:57:54,804 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 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) [2021-12-14 16:57:54,804 INFO L186 Difference]: Start difference. First operand has 69 places, 58 transitions, 146 flow. Second operand 3 states and 199 transitions. [2021-12-14 16:57:54,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 65 transitions, 211 flow [2021-12-14 16:57:54,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 65 transitions, 209 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-14 16:57:54,805 INFO L242 Difference]: Finished difference. Result has 71 places, 62 transitions, 177 flow [2021-12-14 16:57:54,805 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=71, PETRI_TRANSITIONS=62} [2021-12-14 16:57:54,806 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 5 predicate places. [2021-12-14 16:57:54,806 INFO L470 AbstractCegarLoop]: Abstraction has has 71 places, 62 transitions, 177 flow [2021-12-14 16:57:54,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 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) [2021-12-14 16:57:54,806 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:54,806 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] [2021-12-14 16:57:54,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 16:57:54,807 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-14 16:57:54,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:54,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1187205763, now seen corresponding path program 1 times [2021-12-14 16:57:54,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:54,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029498022] [2021-12-14 16:57:54,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:54,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:57:54,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:57:54,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:57:54,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029498022] [2021-12-14 16:57:54,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029498022] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:57:54,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312492991] [2021-12-14 16:57:54,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:54,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:57:54,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:57:54,836 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) [2021-12-14 16:57:54,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 16:57:54,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:57:54,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 16:57:54,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:57:54,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:57:54,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:57:55,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:57:55,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312492991] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:57:55,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:57:55,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-14 16:57:55,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780646136] [2021-12-14 16:57:55,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:57:55,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:57:55,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:57:55,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:57:55,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:57:55,018 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 80 [2021-12-14 16:57:55,019 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 62 transitions, 177 flow. Second operand has 10 states, 10 states have (on average 62.3) internal successors, (623), 10 states have internal predecessors, (623), 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) [2021-12-14 16:57:55,019 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:57:55,019 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 80 [2021-12-14 16:57:55,019 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:57:55,106 INFO L129 PetriNetUnfolder]: 54/233 cut-off events. [2021-12-14 16:57:55,106 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-12-14 16:57:55,107 INFO L84 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 233 events. 54/233 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 820 event pairs, 28 based on Foata normal form. 2/217 useless extension candidates. Maximal degree in co-relation 324. Up to 92 conditions per place. [2021-12-14 16:57:55,108 INFO L132 encePairwiseOnDemand]: 74/80 looper letters, 14 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2021-12-14 16:57:55,108 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 72 transitions, 245 flow [2021-12-14 16:57:55,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:57:55,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-14 16:57:55,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 565 transitions. [2021-12-14 16:57:55,119 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7847222222222222 [2021-12-14 16:57:55,119 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 565 transitions. [2021-12-14 16:57:55,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 565 transitions. [2021-12-14 16:57:55,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:57:55,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 565 transitions. [2021-12-14 16:57:55,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 62.77777777777778) internal successors, (565), 9 states have internal predecessors, (565), 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) [2021-12-14 16:57:55,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 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) [2021-12-14 16:57:55,122 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 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) [2021-12-14 16:57:55,122 INFO L186 Difference]: Start difference. First operand has 71 places, 62 transitions, 177 flow. Second operand 9 states and 565 transitions. [2021-12-14 16:57:55,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 72 transitions, 245 flow [2021-12-14 16:57:55,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 72 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-14 16:57:55,124 INFO L242 Difference]: Finished difference. Result has 81 places, 68 transitions, 222 flow [2021-12-14 16:57:55,125 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=222, PETRI_PLACES=81, PETRI_TRANSITIONS=68} [2021-12-14 16:57:55,140 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 15 predicate places. [2021-12-14 16:57:55,140 INFO L470 AbstractCegarLoop]: Abstraction has has 81 places, 68 transitions, 222 flow [2021-12-14 16:57:55,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 62.3) internal successors, (623), 10 states have internal predecessors, (623), 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) [2021-12-14 16:57:55,140 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:55,140 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:57:55,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 16:57:55,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:57:55,341 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-14 16:57:55,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:55,341 INFO L85 PathProgramCache]: Analyzing trace with hash -909312246, now seen corresponding path program 1 times [2021-12-14 16:57:55,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:55,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648537625] [2021-12-14 16:57:55,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:55,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:57:55,390 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-14 16:57:55,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:57:55,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648537625] [2021-12-14 16:57:55,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648537625] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:57:55,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279821161] [2021-12-14 16:57:55,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:55,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:57:55,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:57:55,412 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:57:55,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 16:57:55,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:57:55,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 16:57:55,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:57:55,603 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-14 16:57:55,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:57:55,759 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-14 16:57:55,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279821161] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:57:55,760 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:57:55,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2021-12-14 16:57:55,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377951104] [2021-12-14 16:57:55,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:57:55,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-14 16:57:55,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:57:55,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-14 16:57:55,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-12-14 16:57:55,763 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2021-12-14 16:57:55,764 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 68 transitions, 222 flow. Second operand has 15 states, 15 states have (on average 53.6) internal successors, (804), 15 states have internal predecessors, (804), 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) [2021-12-14 16:57:55,764 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:57:55,764 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2021-12-14 16:57:55,764 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:57:56,218 INFO L129 PetriNetUnfolder]: 768/1925 cut-off events. [2021-12-14 16:57:56,218 INFO L130 PetriNetUnfolder]: For 1179/1187 co-relation queries the response was YES. [2021-12-14 16:57:56,223 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4594 conditions, 1925 events. 768/1925 cut-off events. For 1179/1187 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12692 event pairs, 54 based on Foata normal form. 13/1938 useless extension candidates. Maximal degree in co-relation 1672. Up to 663 conditions per place. [2021-12-14 16:57:56,232 INFO L132 encePairwiseOnDemand]: 68/80 looper letters, 70 selfloop transitions, 66 changer transitions 0/175 dead transitions. [2021-12-14 16:57:56,232 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 175 transitions, 999 flow [2021-12-14 16:57:56,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-14 16:57:56,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-12-14 16:57:56,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1082 transitions. [2021-12-14 16:57:56,239 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7118421052631579 [2021-12-14 16:57:56,239 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1082 transitions. [2021-12-14 16:57:56,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1082 transitions. [2021-12-14 16:57:56,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:57:56,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1082 transitions. [2021-12-14 16:57:56,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 56.94736842105263) internal successors, (1082), 19 states have internal predecessors, (1082), 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) [2021-12-14 16:57:56,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 80.0) internal successors, (1600), 20 states have internal predecessors, (1600), 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) [2021-12-14 16:57:56,281 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 80.0) internal successors, (1600), 20 states have internal predecessors, (1600), 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) [2021-12-14 16:57:56,281 INFO L186 Difference]: Start difference. First operand has 81 places, 68 transitions, 222 flow. Second operand 19 states and 1082 transitions. [2021-12-14 16:57:56,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 175 transitions, 999 flow [2021-12-14 16:57:56,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 175 transitions, 971 flow, removed 12 selfloop flow, removed 1 redundant places. [2021-12-14 16:57:56,286 INFO L242 Difference]: Finished difference. Result has 100 places, 121 transitions, 607 flow [2021-12-14 16:57:56,286 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=607, PETRI_PLACES=100, PETRI_TRANSITIONS=121} [2021-12-14 16:57:56,287 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 34 predicate places. [2021-12-14 16:57:56,287 INFO L470 AbstractCegarLoop]: Abstraction has has 100 places, 121 transitions, 607 flow [2021-12-14 16:57:56,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 53.6) internal successors, (804), 15 states have internal predecessors, (804), 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) [2021-12-14 16:57:56,287 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:56,287 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:57:56,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 16:57:56,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-14 16:57:56,510 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-14 16:57:56,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:56,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1362214409, now seen corresponding path program 1 times [2021-12-14 16:57:56,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:56,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793460908] [2021-12-14 16:57:56,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:56,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:56,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:57:56,566 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 16:57:56,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:57:56,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793460908] [2021-12-14 16:57:56,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793460908] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:57:56,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648447821] [2021-12-14 16:57:56,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:56,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:57:56,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:57:56,568 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:57:56,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 16:57:56,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:57:56,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-14 16:57:56,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:57:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 16:57:56,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:57:56,918 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 16:57:56,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648447821] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:57:56,918 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:57:56,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-14 16:57:56,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332494301] [2021-12-14 16:57:56,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:57:56,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 16:57:56,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:57:56,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 16:57:56,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-12-14 16:57:56,921 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 80 [2021-12-14 16:57:56,922 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 121 transitions, 607 flow. Second operand has 20 states, 20 states have (on average 52.9) internal successors, (1058), 20 states have internal predecessors, (1058), 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) [2021-12-14 16:57:56,922 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:57:56,922 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 80 [2021-12-14 16:57:56,922 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:57:57,834 INFO L129 PetriNetUnfolder]: 1764/4298 cut-off events. [2021-12-14 16:57:57,834 INFO L130 PetriNetUnfolder]: For 4575/4585 co-relation queries the response was YES. [2021-12-14 16:57:57,846 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12409 conditions, 4298 events. 1764/4298 cut-off events. For 4575/4585 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 34284 event pairs, 65 based on Foata normal form. 28/4326 useless extension candidates. Maximal degree in co-relation 4818. Up to 1292 conditions per place. [2021-12-14 16:57:57,864 INFO L132 encePairwiseOnDemand]: 66/80 looper letters, 113 selfloop transitions, 180 changer transitions 0/337 dead transitions. [2021-12-14 16:57:57,864 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 337 transitions, 2519 flow [2021-12-14 16:57:57,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-14 16:57:57,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-12-14 16:57:57,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2224 transitions. [2021-12-14 16:57:57,870 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6780487804878049 [2021-12-14 16:57:57,870 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2224 transitions. [2021-12-14 16:57:57,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2224 transitions. [2021-12-14 16:57:57,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:57:57,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2224 transitions. [2021-12-14 16:57:57,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 54.24390243902439) internal successors, (2224), 41 states have internal predecessors, (2224), 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) [2021-12-14 16:57:57,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 80.0) internal successors, (3360), 42 states have internal predecessors, (3360), 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) [2021-12-14 16:57:57,880 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 80.0) internal successors, (3360), 42 states have internal predecessors, (3360), 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) [2021-12-14 16:57:57,880 INFO L186 Difference]: Start difference. First operand has 100 places, 121 transitions, 607 flow. Second operand 41 states and 2224 transitions. [2021-12-14 16:57:57,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 337 transitions, 2519 flow [2021-12-14 16:57:57,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 337 transitions, 2497 flow, removed 1 selfloop flow, removed 5 redundant places. [2021-12-14 16:57:57,900 INFO L242 Difference]: Finished difference. Result has 140 places, 255 transitions, 1863 flow [2021-12-14 16:57:57,900 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=1863, PETRI_PLACES=140, PETRI_TRANSITIONS=255} [2021-12-14 16:57:57,900 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 74 predicate places. [2021-12-14 16:57:57,900 INFO L470 AbstractCegarLoop]: Abstraction has has 140 places, 255 transitions, 1863 flow [2021-12-14 16:57:57,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 52.9) internal successors, (1058), 20 states have internal predecessors, (1058), 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) [2021-12-14 16:57:57,901 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:57:57,901 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:57:57,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 16:57:58,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-14 16:57:58,115 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-14 16:57:58,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:57:58,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1109338339, now seen corresponding path program 1 times [2021-12-14 16:57:58,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:57:58,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274052478] [2021-12-14 16:57:58,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:58,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:57:58,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:57:58,178 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:57:58,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:57:58,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274052478] [2021-12-14 16:57:58,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274052478] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:57:58,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93788001] [2021-12-14 16:57:58,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:57:58,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:57:58,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:57:58,180 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:57:58,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 16:57:58,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:57:58,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 16:57:58,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:57:58,376 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:57:58,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:57:58,503 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:57:58,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93788001] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:57:58,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:57:58,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 21 [2021-12-14 16:57:58,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10614305] [2021-12-14 16:57:58,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:57:58,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-14 16:57:58,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:57:58,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-14 16:57:58,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-12-14 16:57:58,507 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 80 [2021-12-14 16:57:58,508 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 255 transitions, 1863 flow. Second operand has 21 states, 21 states have (on average 52.904761904761905) internal successors, (1111), 21 states have internal predecessors, (1111), 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) [2021-12-14 16:57:58,508 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:57:58,508 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 80 [2021-12-14 16:57:58,508 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:58:00,060 INFO L129 PetriNetUnfolder]: 2710/6167 cut-off events. [2021-12-14 16:58:00,061 INFO L130 PetriNetUnfolder]: For 14796/14898 co-relation queries the response was YES. [2021-12-14 16:58:00,084 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20066 conditions, 6167 events. 2710/6167 cut-off events. For 14796/14898 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 49685 event pairs, 0 based on Foata normal form. 295/6461 useless extension candidates. Maximal degree in co-relation 9451. Up to 1549 conditions per place. [2021-12-14 16:58:00,110 INFO L132 encePairwiseOnDemand]: 67/80 looper letters, 380 selfloop transitions, 600 changer transitions 0/1041 dead transitions. [2021-12-14 16:58:00,110 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 1041 transitions, 10637 flow [2021-12-14 16:58:00,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-14 16:58:00,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-12-14 16:58:00,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3228 transitions. [2021-12-14 16:58:00,115 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6838983050847458 [2021-12-14 16:58:00,115 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3228 transitions. [2021-12-14 16:58:00,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3228 transitions. [2021-12-14 16:58:00,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:58:00,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3228 transitions. [2021-12-14 16:58:00,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 54.71186440677966) internal successors, (3228), 59 states have internal predecessors, (3228), 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) [2021-12-14 16:58:00,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 80.0) internal successors, (4800), 60 states have internal predecessors, (4800), 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) [2021-12-14 16:58:00,125 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 80.0) internal successors, (4800), 60 states have internal predecessors, (4800), 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) [2021-12-14 16:58:00,125 INFO L186 Difference]: Start difference. First operand has 140 places, 255 transitions, 1863 flow. Second operand 59 states and 3228 transitions. [2021-12-14 16:58:00,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 1041 transitions, 10637 flow [2021-12-14 16:58:00,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 1041 transitions, 10210 flow, removed 15 selfloop flow, removed 15 redundant places. [2021-12-14 16:58:00,191 INFO L242 Difference]: Finished difference. Result has 187 places, 737 transitions, 6892 flow [2021-12-14 16:58:00,191 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=1661, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=6892, PETRI_PLACES=187, PETRI_TRANSITIONS=737} [2021-12-14 16:58:00,191 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 121 predicate places. [2021-12-14 16:58:00,191 INFO L470 AbstractCegarLoop]: Abstraction has has 187 places, 737 transitions, 6892 flow [2021-12-14 16:58:00,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 52.904761904761905) internal successors, (1111), 21 states have internal predecessors, (1111), 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) [2021-12-14 16:58:00,192 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:58:00,192 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:58:00,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 16:58:00,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:58:00,408 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-14 16:58:00,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:58:00,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1693116247, now seen corresponding path program 1 times [2021-12-14 16:58:00,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:58:00,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554408906] [2021-12-14 16:58:00,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:58:00,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:58:00,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 16:58:00,421 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 16:58:00,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 16:58:00,432 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 16:58:00,432 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-14 16:58:00,432 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 2 remaining) [2021-12-14 16:58:00,432 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-14 16:58:00,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 16:58:00,433 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:58:00,433 WARN L234 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-12-14 16:58:00,433 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-12-14 16:58:00,438 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,438 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,438 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,438 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,438 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,439 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,439 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,439 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,439 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,439 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,439 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,439 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,440 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,440 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,440 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,440 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,440 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,440 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,440 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,440 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,441 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,441 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,441 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,441 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,441 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,441 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,441 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,441 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,441 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,441 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,442 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,442 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,442 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,442 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,442 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,442 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,442 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,442 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,442 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,443 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,443 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,443 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,443 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,443 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,443 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,443 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,443 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,443 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,444 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,444 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,444 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,444 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,444 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,444 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,444 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,444 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,444 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,444 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,445 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,445 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,445 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,445 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,445 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,445 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,445 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,445 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,445 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,446 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,446 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,446 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,446 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,446 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,446 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,446 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,446 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,446 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,447 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,447 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,447 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,447 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,447 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,447 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,447 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,447 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,447 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,448 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,448 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,448 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,448 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,448 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,448 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,448 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,448 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,448 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,449 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,449 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,449 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,449 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,449 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,449 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,449 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,450 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,450 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,450 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,450 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,450 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,450 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,450 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,451 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,451 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,451 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,451 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,451 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,451 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,451 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,452 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,452 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,452 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,452 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,452 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,452 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,453 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,453 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,453 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,453 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:58:00,454 INFO L148 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2021-12-14 16:58:00,455 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:58:00,455 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 [2021-12-14 16:58:00,455 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 16:58:00,456 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 90 places, 87 transitions, 234 flow [2021-12-14 16:58:00,488 INFO L129 PetriNetUnfolder]: 98/672 cut-off events. [2021-12-14 16:58:00,488 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2021-12-14 16:58:00,489 INFO L84 FinitePrefix]: Finished finitePrefix Result has 783 conditions, 672 events. 98/672 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2833 event pairs, 23 based on Foata normal form. 0/584 useless extension candidates. Maximal degree in co-relation 422. Up to 80 conditions per place. [2021-12-14 16:58:00,489 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 87 transitions, 234 flow [2021-12-14 16:58:00,490 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 64 transitions, 173 flow [2021-12-14 16:58:00,491 INFO L129 PetriNetUnfolder]: 1/26 cut-off events. [2021-12-14 16:58:00,491 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-14 16:58:00,491 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:58:00,491 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] [2021-12-14 16:58:00,491 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-14 16:58:00,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:58:00,492 INFO L85 PathProgramCache]: Analyzing trace with hash 239291490, now seen corresponding path program 1 times [2021-12-14 16:58:00,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:58:00,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398153708] [2021-12-14 16:58:00,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:58:00,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:58:00,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:58:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:58:00,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:58:00,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398153708] [2021-12-14 16:58:00,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398153708] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:58:00,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:58:00,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 16:58:00,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417510252] [2021-12-14 16:58:00,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:58:00,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 16:58:00,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:58:00,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 16:58:00,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 16:58:00,504 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 87 [2021-12-14 16:58:00,504 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 64 transitions, 173 flow. Second operand has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 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) [2021-12-14 16:58:00,504 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:58:00,504 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 87 [2021-12-14 16:58:00,504 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:58:00,514 INFO L129 PetriNetUnfolder]: 0/118 cut-off events. [2021-12-14 16:58:00,514 INFO L130 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2021-12-14 16:58:00,514 INFO L84 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 118 events. 0/118 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 83 event pairs, 0 based on Foata normal form. 6/118 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-12-14 16:58:00,515 INFO L132 encePairwiseOnDemand]: 86/87 looper letters, 5 selfloop transitions, 0 changer transitions 0/63 dead transitions. [2021-12-14 16:58:00,515 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 63 transitions, 181 flow [2021-12-14 16:58:00,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 16:58:00,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-14 16:58:00,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 152 transitions. [2021-12-14 16:58:00,516 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8735632183908046 [2021-12-14 16:58:00,516 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 152 transitions. [2021-12-14 16:58:00,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 152 transitions. [2021-12-14 16:58:00,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:58:00,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 152 transitions. [2021-12-14 16:58:00,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 76.0) internal successors, (152), 2 states have internal predecessors, (152), 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) [2021-12-14 16:58:00,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 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) [2021-12-14 16:58:00,517 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 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) [2021-12-14 16:58:00,517 INFO L186 Difference]: Start difference. First operand has 74 places, 64 transitions, 173 flow. Second operand 2 states and 152 transitions. [2021-12-14 16:58:00,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 63 transitions, 181 flow [2021-12-14 16:58:00,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 63 transitions, 161 flow, removed 10 selfloop flow, removed 0 redundant places. [2021-12-14 16:58:00,518 INFO L242 Difference]: Finished difference. Result has 75 places, 63 transitions, 151 flow [2021-12-14 16:58:00,518 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=151, PETRI_PLACES=75, PETRI_TRANSITIONS=63} [2021-12-14 16:58:00,519 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2021-12-14 16:58:00,519 INFO L470 AbstractCegarLoop]: Abstraction has has 75 places, 63 transitions, 151 flow [2021-12-14 16:58:00,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 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) [2021-12-14 16:58:00,519 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:58:00,519 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] [2021-12-14 16:58:00,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-14 16:58:00,520 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-14 16:58:00,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:58:00,520 INFO L85 PathProgramCache]: Analyzing trace with hash 239292451, now seen corresponding path program 1 times [2021-12-14 16:58:00,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:58:00,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78536154] [2021-12-14 16:58:00,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:58:00,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:58:00,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:58:00,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:58:00,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:58:00,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78536154] [2021-12-14 16:58:00,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78536154] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:58:00,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:58:00,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:58:00,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78739133] [2021-12-14 16:58:00,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:58:00,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:58:00,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:58:00,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:58:00,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:58:00,534 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 87 [2021-12-14 16:58:00,534 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 63 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 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) [2021-12-14 16:58:00,534 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:58:00,542 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 87 [2021-12-14 16:58:00,542 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:58:00,556 INFO L129 PetriNetUnfolder]: 0/115 cut-off events. [2021-12-14 16:58:00,560 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-12-14 16:58:00,560 INFO L84 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 115 events. 0/115 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 83 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2021-12-14 16:58:00,560 INFO L132 encePairwiseOnDemand]: 84/87 looper letters, 14 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2021-12-14 16:58:00,560 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 67 transitions, 191 flow [2021-12-14 16:58:00,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:58:00,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-14 16:58:00,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2021-12-14 16:58:00,561 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8237547892720306 [2021-12-14 16:58:00,561 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2021-12-14 16:58:00,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2021-12-14 16:58:00,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:58:00,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2021-12-14 16:58:00,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 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) [2021-12-14 16:58:00,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 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) [2021-12-14 16:58:00,563 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 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) [2021-12-14 16:58:00,563 INFO L186 Difference]: Start difference. First operand has 75 places, 63 transitions, 151 flow. Second operand 3 states and 215 transitions. [2021-12-14 16:58:00,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 67 transitions, 191 flow [2021-12-14 16:58:00,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 67 transitions, 191 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-14 16:58:00,580 INFO L242 Difference]: Finished difference. Result has 78 places, 64 transitions, 163 flow [2021-12-14 16:58:00,580 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=78, PETRI_TRANSITIONS=64} [2021-12-14 16:58:00,580 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2021-12-14 16:58:00,580 INFO L470 AbstractCegarLoop]: Abstraction has has 78 places, 64 transitions, 163 flow [2021-12-14 16:58:00,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 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) [2021-12-14 16:58:00,581 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:58:00,581 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] [2021-12-14 16:58:00,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-14 16:58:00,581 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-14 16:58:00,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:58:00,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1483448859, now seen corresponding path program 1 times [2021-12-14 16:58:00,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:58:00,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14834847] [2021-12-14 16:58:00,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:58:00,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:58:00,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:58:00,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 16:58:00,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:58:00,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14834847] [2021-12-14 16:58:00,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14834847] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:58:00,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:58:00,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:58:00,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133638184] [2021-12-14 16:58:00,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:58:00,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:58:00,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:58:00,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:58:00,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:58:00,597 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 87 [2021-12-14 16:58:00,597 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 64 transitions, 163 flow. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 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) [2021-12-14 16:58:00,597 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:58:00,597 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 87 [2021-12-14 16:58:00,597 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:58:00,698 INFO L129 PetriNetUnfolder]: 212/733 cut-off events. [2021-12-14 16:58:00,698 INFO L130 PetriNetUnfolder]: For 92/92 co-relation queries the response was YES. [2021-12-14 16:58:00,700 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1205 conditions, 733 events. 212/733 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4068 event pairs, 118 based on Foata normal form. 5/703 useless extension candidates. Maximal degree in co-relation 1195. Up to 327 conditions per place. [2021-12-14 16:58:00,712 INFO L132 encePairwiseOnDemand]: 80/87 looper letters, 16 selfloop transitions, 6 changer transitions 0/73 dead transitions. [2021-12-14 16:58:00,767 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 73 transitions, 245 flow [2021-12-14 16:58:00,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:58:00,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-14 16:58:00,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2021-12-14 16:58:00,768 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8237547892720306 [2021-12-14 16:58:00,769 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2021-12-14 16:58:00,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2021-12-14 16:58:00,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:58:00,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2021-12-14 16:58:00,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 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) [2021-12-14 16:58:00,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 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) [2021-12-14 16:58:00,770 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 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) [2021-12-14 16:58:00,770 INFO L186 Difference]: Start difference. First operand has 78 places, 64 transitions, 163 flow. Second operand 3 states and 215 transitions. [2021-12-14 16:58:00,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 73 transitions, 245 flow [2021-12-14 16:58:00,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 73 transitions, 243 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-14 16:58:00,771 INFO L242 Difference]: Finished difference. Result has 80 places, 69 transitions, 201 flow [2021-12-14 16:58:00,771 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=80, PETRI_TRANSITIONS=69} [2021-12-14 16:58:00,771 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 6 predicate places. [2021-12-14 16:58:00,771 INFO L470 AbstractCegarLoop]: Abstraction has has 80 places, 69 transitions, 201 flow [2021-12-14 16:58:00,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 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) [2021-12-14 16:58:00,771 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:58:00,772 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] [2021-12-14 16:58:00,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-14 16:58:00,772 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-14 16:58:00,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:58:00,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1737726477, now seen corresponding path program 1 times [2021-12-14 16:58:00,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:58:00,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858185046] [2021-12-14 16:58:00,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:58:00,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:58:00,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:58:00,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:58:00,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:58:00,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858185046] [2021-12-14 16:58:00,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858185046] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:58:00,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022406350] [2021-12-14 16:58:00,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:58:00,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:58:00,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:58:00,792 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:58:00,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 16:58:00,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:58:00,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 16:58:00,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:58:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:58:00,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:58:00,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:58:00,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022406350] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:58:00,936 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:58:00,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-14 16:58:00,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739342576] [2021-12-14 16:58:00,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:58:00,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:58:00,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:58:00,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:58:00,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:58:00,938 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2021-12-14 16:58:00,939 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 69 transitions, 201 flow. Second operand has 10 states, 10 states have (on average 67.3) internal successors, (673), 10 states have internal predecessors, (673), 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) [2021-12-14 16:58:00,939 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:58:00,939 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2021-12-14 16:58:00,940 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:58:01,003 INFO L129 PetriNetUnfolder]: 161/489 cut-off events. [2021-12-14 16:58:01,003 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-12-14 16:58:01,005 INFO L84 FinitePrefix]: Finished finitePrefix Result has 812 conditions, 489 events. 161/489 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2426 event pairs, 94 based on Foata normal form. 2/442 useless extension candidates. Maximal degree in co-relation 801. Up to 246 conditions per place. [2021-12-14 16:58:01,006 INFO L132 encePairwiseOnDemand]: 81/87 looper letters, 15 selfloop transitions, 9 changer transitions 0/79 dead transitions. [2021-12-14 16:58:01,006 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 79 transitions, 271 flow [2021-12-14 16:58:01,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:58:01,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-14 16:58:01,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 611 transitions. [2021-12-14 16:58:01,008 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7803320561941252 [2021-12-14 16:58:01,008 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 611 transitions. [2021-12-14 16:58:01,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 611 transitions. [2021-12-14 16:58:01,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:58:01,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 611 transitions. [2021-12-14 16:58:01,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 67.88888888888889) internal successors, (611), 9 states have internal predecessors, (611), 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) [2021-12-14 16:58:01,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 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) [2021-12-14 16:58:01,010 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 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) [2021-12-14 16:58:01,010 INFO L186 Difference]: Start difference. First operand has 80 places, 69 transitions, 201 flow. Second operand 9 states and 611 transitions. [2021-12-14 16:58:01,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 79 transitions, 271 flow [2021-12-14 16:58:01,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 79 transitions, 265 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-14 16:58:01,012 INFO L242 Difference]: Finished difference. Result has 90 places, 75 transitions, 245 flow [2021-12-14 16:58:01,012 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=245, PETRI_PLACES=90, PETRI_TRANSITIONS=75} [2021-12-14 16:58:01,012 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 16 predicate places. [2021-12-14 16:58:01,012 INFO L470 AbstractCegarLoop]: Abstraction has has 90 places, 75 transitions, 245 flow [2021-12-14 16:58:01,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 67.3) internal successors, (673), 10 states have internal predecessors, (673), 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) [2021-12-14 16:58:01,013 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:58:01,013 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:58:01,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 16:58:01,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:58:01,229 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-14 16:58:01,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:58:01,230 INFO L85 PathProgramCache]: Analyzing trace with hash 157483872, now seen corresponding path program 1 times [2021-12-14 16:58:01,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:58:01,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841098189] [2021-12-14 16:58:01,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:58:01,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:58:01,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:58:01,271 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-14 16:58:01,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:58:01,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841098189] [2021-12-14 16:58:01,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841098189] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:58:01,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821567979] [2021-12-14 16:58:01,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:58:01,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:58:01,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:58:01,273 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:58:01,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 16:58:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:58:01,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 16:58:01,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:58:01,443 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:58:01,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:58:01,521 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:58:01,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821567979] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:58:01,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:58:01,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 16 [2021-12-14 16:58:01,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990169604] [2021-12-14 16:58:01,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:58:01,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-14 16:58:01,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:58:01,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-14 16:58:01,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:58:01,524 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 87 [2021-12-14 16:58:01,527 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 75 transitions, 245 flow. Second operand has 16 states, 16 states have (on average 57.3125) internal successors, (917), 16 states have internal predecessors, (917), 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) [2021-12-14 16:58:01,527 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:58:01,527 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 87 [2021-12-14 16:58:01,527 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:58:03,059 INFO L129 PetriNetUnfolder]: 2264/4409 cut-off events. [2021-12-14 16:58:03,059 INFO L130 PetriNetUnfolder]: For 2523/2523 co-relation queries the response was YES. [2021-12-14 16:58:03,078 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11286 conditions, 4409 events. 2264/4409 cut-off events. For 2523/2523 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 29439 event pairs, 78 based on Foata normal form. 74/4483 useless extension candidates. Maximal degree in co-relation 11273. Up to 1984 conditions per place. [2021-12-14 16:58:03,101 INFO L132 encePairwiseOnDemand]: 71/87 looper letters, 171 selfloop transitions, 243 changer transitions 0/454 dead transitions. [2021-12-14 16:58:03,101 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 454 transitions, 2650 flow [2021-12-14 16:58:03,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-14 16:58:03,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-12-14 16:58:03,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 4667 transitions. [2021-12-14 16:58:03,106 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6790339007711335 [2021-12-14 16:58:03,107 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 4667 transitions. [2021-12-14 16:58:03,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 4667 transitions. [2021-12-14 16:58:03,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:58:03,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 4667 transitions. [2021-12-14 16:58:03,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 59.075949367088604) internal successors, (4667), 79 states have internal predecessors, (4667), 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) [2021-12-14 16:58:03,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 87.0) internal successors, (6960), 80 states have internal predecessors, (6960), 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) [2021-12-14 16:58:03,120 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 87.0) internal successors, (6960), 80 states have internal predecessors, (6960), 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) [2021-12-14 16:58:03,120 INFO L186 Difference]: Start difference. First operand has 90 places, 75 transitions, 245 flow. Second operand 79 states and 4667 transitions. [2021-12-14 16:58:03,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 454 transitions, 2650 flow [2021-12-14 16:58:03,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 454 transitions, 2598 flow, removed 24 selfloop flow, removed 1 redundant places. [2021-12-14 16:58:03,129 INFO L242 Difference]: Finished difference. Result has 193 places, 311 transitions, 1969 flow [2021-12-14 16:58:03,129 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=1969, PETRI_PLACES=193, PETRI_TRANSITIONS=311} [2021-12-14 16:58:03,129 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 119 predicate places. [2021-12-14 16:58:03,129 INFO L470 AbstractCegarLoop]: Abstraction has has 193 places, 311 transitions, 1969 flow [2021-12-14 16:58:03,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 57.3125) internal successors, (917), 16 states have internal predecessors, (917), 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) [2021-12-14 16:58:03,130 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:58:03,130 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:58:03,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 16:58:03,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-14 16:58:03,347 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-14 16:58:03,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:58:03,347 INFO L85 PathProgramCache]: Analyzing trace with hash -184578877, now seen corresponding path program 1 times [2021-12-14 16:58:03,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:58:03,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233374439] [2021-12-14 16:58:03,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:58:03,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:58:03,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:58:03,437 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 88 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:58:03,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:58:03,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233374439] [2021-12-14 16:58:03,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233374439] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:58:03,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546297660] [2021-12-14 16:58:03,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:58:03,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:58:03,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:58:03,438 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:58:03,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 16:58:03,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:58:03,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 16:58:03,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:58:03,623 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:58:03,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 16:58:03,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546297660] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:58:03,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:58:03,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-12-14 16:58:03,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152322090] [2021-12-14 16:58:03,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:58:03,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 16:58:03,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:58:03,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 16:58:03,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-12-14 16:58:03,625 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2021-12-14 16:58:03,626 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 311 transitions, 1969 flow. Second operand has 13 states, 13 states have (on average 67.61538461538461) internal successors, (879), 13 states have internal predecessors, (879), 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) [2021-12-14 16:58:03,626 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:58:03,626 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2021-12-14 16:58:03,626 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:58:03,990 INFO L129 PetriNetUnfolder]: 926/2474 cut-off events. [2021-12-14 16:58:03,990 INFO L130 PetriNetUnfolder]: For 30531/31152 co-relation queries the response was YES. [2021-12-14 16:58:04,008 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11431 conditions, 2474 events. 926/2474 cut-off events. For 30531/31152 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 18260 event pairs, 213 based on Foata normal form. 353/2730 useless extension candidates. Maximal degree in co-relation 11391. Up to 1007 conditions per place. [2021-12-14 16:58:04,021 INFO L132 encePairwiseOnDemand]: 82/87 looper letters, 17 selfloop transitions, 82 changer transitions 0/311 dead transitions. [2021-12-14 16:58:04,022 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 311 transitions, 2137 flow [2021-12-14 16:58:04,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 16:58:04,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-14 16:58:04,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1204 transitions. [2021-12-14 16:58:04,024 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.768837803320562 [2021-12-14 16:58:04,024 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1204 transitions. [2021-12-14 16:58:04,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1204 transitions. [2021-12-14 16:58:04,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:58:04,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1204 transitions. [2021-12-14 16:58:04,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 66.88888888888889) internal successors, (1204), 18 states have internal predecessors, (1204), 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) [2021-12-14 16:58:04,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 87.0) internal successors, (1653), 19 states have internal predecessors, (1653), 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) [2021-12-14 16:58:04,027 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 87.0) internal successors, (1653), 19 states have internal predecessors, (1653), 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) [2021-12-14 16:58:04,027 INFO L186 Difference]: Start difference. First operand has 193 places, 311 transitions, 1969 flow. Second operand 18 states and 1204 transitions. [2021-12-14 16:58:04,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 311 transitions, 2137 flow [2021-12-14 16:58:04,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 311 transitions, 1953 flow, removed 27 selfloop flow, removed 12 redundant places. [2021-12-14 16:58:04,075 INFO L242 Difference]: Finished difference. Result has 197 places, 304 transitions, 1885 flow [2021-12-14 16:58:04,075 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1721, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1885, PETRI_PLACES=197, PETRI_TRANSITIONS=304} [2021-12-14 16:58:04,075 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 123 predicate places. [2021-12-14 16:58:04,075 INFO L470 AbstractCegarLoop]: Abstraction has has 197 places, 304 transitions, 1885 flow [2021-12-14 16:58:04,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 67.61538461538461) internal successors, (879), 13 states have internal predecessors, (879), 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) [2021-12-14 16:58:04,076 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:58:04,076 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:58:04,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 16:58:04,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-14 16:58:04,293 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-14 16:58:04,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:58:04,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1466686242, now seen corresponding path program 1 times [2021-12-14 16:58:04,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:58:04,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913999084] [2021-12-14 16:58:04,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:58:04,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:58:04,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:58:04,354 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-14 16:58:04,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:58:04,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913999084] [2021-12-14 16:58:04,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913999084] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:58:04,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584102680] [2021-12-14 16:58:04,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:58:04,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:58:04,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:58:04,356 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:58:04,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 16:58:04,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:58:04,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-14 16:58:04,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:58:04,590 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-14 16:58:04,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:58:04,776 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-14 16:58:04,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584102680] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:58:04,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:58:04,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-14 16:58:04,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616337615] [2021-12-14 16:58:04,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:58:04,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 16:58:04,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:58:04,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 16:58:04,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-12-14 16:58:04,779 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 87 [2021-12-14 16:58:04,780 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 304 transitions, 1885 flow. Second operand has 20 states, 20 states have (on average 57.7) internal successors, (1154), 20 states have internal predecessors, (1154), 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) [2021-12-14 16:58:04,780 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:58:04,780 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 87 [2021-12-14 16:58:04,780 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:58:06,306 INFO L129 PetriNetUnfolder]: 4044/7969 cut-off events. [2021-12-14 16:58:06,306 INFO L130 PetriNetUnfolder]: For 72958/72980 co-relation queries the response was YES. [2021-12-14 16:58:06,427 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37934 conditions, 7969 events. 4044/7969 cut-off events. For 72958/72980 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 59380 event pairs, 66 based on Foata normal form. 44/8013 useless extension candidates. Maximal degree in co-relation 37896. Up to 3105 conditions per place. [2021-12-14 16:58:06,481 INFO L132 encePairwiseOnDemand]: 72/87 looper letters, 333 selfloop transitions, 374 changer transitions 0/794 dead transitions. [2021-12-14 16:58:06,481 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 794 transitions, 7248 flow [2021-12-14 16:58:06,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-14 16:58:06,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-12-14 16:58:06,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2406 transitions. [2021-12-14 16:58:06,484 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6745164003364171 [2021-12-14 16:58:06,485 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2406 transitions. [2021-12-14 16:58:06,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2406 transitions. [2021-12-14 16:58:06,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:58:06,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2406 transitions. [2021-12-14 16:58:06,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 58.68292682926829) internal successors, (2406), 41 states have internal predecessors, (2406), 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) [2021-12-14 16:58:06,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 87.0) internal successors, (3654), 42 states have internal predecessors, (3654), 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) [2021-12-14 16:58:06,492 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 87.0) internal successors, (3654), 42 states have internal predecessors, (3654), 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) [2021-12-14 16:58:06,493 INFO L186 Difference]: Start difference. First operand has 197 places, 304 transitions, 1885 flow. Second operand 41 states and 2406 transitions. [2021-12-14 16:58:06,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 794 transitions, 7248 flow [2021-12-14 16:58:06,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 794 transitions, 6504 flow, removed 0 selfloop flow, removed 15 redundant places. [2021-12-14 16:58:06,657 INFO L242 Difference]: Finished difference. Result has 224 places, 566 transitions, 4395 flow [2021-12-14 16:58:06,658 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1655, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=4395, PETRI_PLACES=224, PETRI_TRANSITIONS=566} [2021-12-14 16:58:06,658 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 150 predicate places. [2021-12-14 16:58:06,658 INFO L470 AbstractCegarLoop]: Abstraction has has 224 places, 566 transitions, 4395 flow [2021-12-14 16:58:06,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.7) internal successors, (1154), 20 states have internal predecessors, (1154), 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) [2021-12-14 16:58:06,659 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:58:06,659 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:58:06,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 16:58:06,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-14 16:58:06,875 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-14 16:58:06,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:58:06,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1484109075, now seen corresponding path program 1 times [2021-12-14 16:58:06,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:58:06,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198697160] [2021-12-14 16:58:06,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:58:06,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:58:06,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:58:06,947 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 16:58:06,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:58:06,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198697160] [2021-12-14 16:58:06,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198697160] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:58:06,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648924593] [2021-12-14 16:58:06,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:58:06,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:58:06,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:58:06,949 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:58:06,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 16:58:07,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:58:07,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 16:58:07,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:58:07,209 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 16:58:07,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:58:07,430 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 16:58:07,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648924593] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:58:07,431 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:58:07,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2021-12-14 16:58:07,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130525340] [2021-12-14 16:58:07,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:58:07,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-14 16:58:07,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:58:07,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-14 16:58:07,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-12-14 16:58:07,433 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 87 [2021-12-14 16:58:07,434 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 566 transitions, 4395 flow. Second operand has 23 states, 23 states have (on average 57.34782608695652) internal successors, (1319), 23 states have internal predecessors, (1319), 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) [2021-12-14 16:58:07,434 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:58:07,435 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 87 [2021-12-14 16:58:07,435 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:58:10,438 INFO L129 PetriNetUnfolder]: 7761/15568 cut-off events. [2021-12-14 16:58:10,438 INFO L130 PetriNetUnfolder]: For 168204/168299 co-relation queries the response was YES. [2021-12-14 16:58:10,555 INFO L84 FinitePrefix]: Finished finitePrefix Result has 76750 conditions, 15568 events. 7761/15568 cut-off events. For 168204/168299 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 132651 event pairs, 90 based on Foata normal form. 93/15656 useless extension candidates. Maximal degree in co-relation 76710. Up to 5383 conditions per place. [2021-12-14 16:58:10,635 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 392 selfloop transitions, 859 changer transitions 0/1356 dead transitions. [2021-12-14 16:58:10,635 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 1356 transitions, 14830 flow [2021-12-14 16:58:10,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-14 16:58:10,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-12-14 16:58:10,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3846 transitions. [2021-12-14 16:58:10,639 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.680106100795756 [2021-12-14 16:58:10,639 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3846 transitions. [2021-12-14 16:58:10,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3846 transitions. [2021-12-14 16:58:10,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:58:10,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3846 transitions. [2021-12-14 16:58:10,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 59.16923076923077) internal successors, (3846), 65 states have internal predecessors, (3846), 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) [2021-12-14 16:58:10,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 87.0) internal successors, (5742), 66 states have internal predecessors, (5742), 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) [2021-12-14 16:58:10,649 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 87.0) internal successors, (5742), 66 states have internal predecessors, (5742), 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) [2021-12-14 16:58:10,649 INFO L186 Difference]: Start difference. First operand has 224 places, 566 transitions, 4395 flow. Second operand 65 states and 3846 transitions. [2021-12-14 16:58:10,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 1356 transitions, 14830 flow [2021-12-14 16:58:11,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 1356 transitions, 14017 flow, removed 233 selfloop flow, removed 10 redundant places. [2021-12-14 16:58:11,148 INFO L242 Difference]: Finished difference. Result has 286 places, 1129 transitions, 11002 flow [2021-12-14 16:58:11,148 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=4168, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=11002, PETRI_PLACES=286, PETRI_TRANSITIONS=1129} [2021-12-14 16:58:11,149 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 212 predicate places. [2021-12-14 16:58:11,149 INFO L470 AbstractCegarLoop]: Abstraction has has 286 places, 1129 transitions, 11002 flow [2021-12-14 16:58:11,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 57.34782608695652) internal successors, (1319), 23 states have internal predecessors, (1319), 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) [2021-12-14 16:58:11,149 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:58:11,150 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:58:11,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-14 16:58:11,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-14 16:58:11,356 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-14 16:58:11,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:58:11,356 INFO L85 PathProgramCache]: Analyzing trace with hash 813208193, now seen corresponding path program 1 times [2021-12-14 16:58:11,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:58:11,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403001329] [2021-12-14 16:58:11,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:58:11,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:58:11,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:58:11,453 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:58:11,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:58:11,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403001329] [2021-12-14 16:58:11,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403001329] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:58:11,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587251384] [2021-12-14 16:58:11,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:58:11,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:58:11,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:58:11,455 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:58:11,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-14 16:58:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:58:11,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-14 16:58:11,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:58:11,713 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:58:11,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:58:11,876 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:58:11,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587251384] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:58:11,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:58:11,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2021-12-14 16:58:11,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848561279] [2021-12-14 16:58:11,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:58:11,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-14 16:58:11,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:58:11,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-14 16:58:11,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-12-14 16:58:11,879 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 87 [2021-12-14 16:58:11,880 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 1129 transitions, 11002 flow. Second operand has 23 states, 23 states have (on average 57.04347826086956) internal successors, (1312), 23 states have internal predecessors, (1312), 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) [2021-12-14 16:58:11,880 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:58:11,880 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 87 [2021-12-14 16:58:11,880 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:58:17,211 INFO L129 PetriNetUnfolder]: 13758/27553 cut-off events. [2021-12-14 16:58:17,211 INFO L130 PetriNetUnfolder]: For 321118/321418 co-relation queries the response was YES. [2021-12-14 16:58:17,461 INFO L84 FinitePrefix]: Finished finitePrefix Result has 137915 conditions, 27553 events. 13758/27553 cut-off events. For 321118/321418 co-relation queries the response was YES. Maximal size of possible extension queue 1339. Compared 255943 event pairs, 130 based on Foata normal form. 246/27779 useless extension candidates. Maximal degree in co-relation 137872. Up to 8280 conditions per place. [2021-12-14 16:58:17,604 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 453 selfloop transitions, 1615 changer transitions 0/2203 dead transitions. [2021-12-14 16:58:17,604 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 2203 transitions, 27206 flow [2021-12-14 16:58:17,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-14 16:58:17,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-12-14 16:58:17,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3140 transitions. [2021-12-14 16:58:17,608 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6809802645846887 [2021-12-14 16:58:17,608 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3140 transitions. [2021-12-14 16:58:17,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3140 transitions. [2021-12-14 16:58:17,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:58:17,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3140 transitions. [2021-12-14 16:58:17,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 59.24528301886792) internal successors, (3140), 53 states have internal predecessors, (3140), 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) [2021-12-14 16:58:17,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 87.0) internal successors, (4698), 54 states have internal predecessors, (4698), 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) [2021-12-14 16:58:17,616 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 87.0) internal successors, (4698), 54 states have internal predecessors, (4698), 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) [2021-12-14 16:58:17,616 INFO L186 Difference]: Start difference. First operand has 286 places, 1129 transitions, 11002 flow. Second operand 53 states and 3140 transitions. [2021-12-14 16:58:17,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 2203 transitions, 27206 flow [2021-12-14 16:58:20,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 2203 transitions, 26708 flow, removed 182 selfloop flow, removed 15 redundant places. [2021-12-14 16:58:20,661 INFO L242 Difference]: Finished difference. Result has 328 places, 2016 transitions, 24087 flow [2021-12-14 16:58:20,662 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=10668, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=728, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=24087, PETRI_PLACES=328, PETRI_TRANSITIONS=2016} [2021-12-14 16:58:20,663 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 254 predicate places. [2021-12-14 16:58:20,663 INFO L470 AbstractCegarLoop]: Abstraction has has 328 places, 2016 transitions, 24087 flow [2021-12-14 16:58:20,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 57.04347826086956) internal successors, (1312), 23 states have internal predecessors, (1312), 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) [2021-12-14 16:58:20,663 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:58:20,664 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:58:20,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-14 16:58:20,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-14 16:58:20,881 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-14 16:58:20,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:58:20,881 INFO L85 PathProgramCache]: Analyzing trace with hash 933906732, now seen corresponding path program 1 times [2021-12-14 16:58:20,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:58:20,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738316323] [2021-12-14 16:58:20,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:58:20,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:58:20,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:58:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-14 16:58:20,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:58:20,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738316323] [2021-12-14 16:58:20,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738316323] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:58:20,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:58:20,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:58:20,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644766462] [2021-12-14 16:58:20,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:58:20,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:58:20,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:58:20,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:58:20,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:58:20,943 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 87 [2021-12-14 16:58:20,944 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 2016 transitions, 24087 flow. Second operand has 7 states, 7 states have (on average 58.142857142857146) internal successors, (407), 7 states have internal predecessors, (407), 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) [2021-12-14 16:58:20,944 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:58:20,944 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 87 [2021-12-14 16:58:20,944 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:58:29,917 INFO L129 PetriNetUnfolder]: 20206/41363 cut-off events. [2021-12-14 16:58:29,917 INFO L130 PetriNetUnfolder]: For 450710/451229 co-relation queries the response was YES. [2021-12-14 16:58:30,499 INFO L84 FinitePrefix]: Finished finitePrefix Result has 195284 conditions, 41363 events. 20206/41363 cut-off events. For 450710/451229 co-relation queries the response was YES. Maximal size of possible extension queue 2129. Compared 426891 event pairs, 200 based on Foata normal form. 469/41758 useless extension candidates. Maximal degree in co-relation 195237. Up to 10349 conditions per place. [2021-12-14 16:58:30,537 INFO L132 encePairwiseOnDemand]: 74/87 looper letters, 0 selfloop transitions, 0 changer transitions 3079/3079 dead transitions. [2021-12-14 16:58:30,537 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 3079 transitions, 44657 flow [2021-12-14 16:58:30,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-14 16:58:30,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-14 16:58:30,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1052 transitions. [2021-12-14 16:58:30,538 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.711291413116971 [2021-12-14 16:58:30,538 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1052 transitions. [2021-12-14 16:58:30,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1052 transitions. [2021-12-14 16:58:30,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:58:30,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1052 transitions. [2021-12-14 16:58:30,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 61.88235294117647) internal successors, (1052), 17 states have internal predecessors, (1052), 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) [2021-12-14 16:58:30,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 87.0) internal successors, (1566), 18 states have internal predecessors, (1566), 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) [2021-12-14 16:58:30,541 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 87.0) internal successors, (1566), 18 states have internal predecessors, (1566), 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) [2021-12-14 16:58:30,542 INFO L186 Difference]: Start difference. First operand has 328 places, 2016 transitions, 24087 flow. Second operand 17 states and 1052 transitions. [2021-12-14 16:58:30,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 3079 transitions, 44657 flow [2021-12-14 16:58:38,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 3079 transitions, 43734 flow, removed 270 selfloop flow, removed 21 redundant places. [2021-12-14 16:58:38,353 INFO L242 Difference]: Finished difference. Result has 321 places, 0 transitions, 0 flow [2021-12-14 16:58:38,354 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=23326, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2014, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2014, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=0, PETRI_PLACES=321, PETRI_TRANSITIONS=0} [2021-12-14 16:58:38,355 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 247 predicate places. [2021-12-14 16:58:38,355 INFO L470 AbstractCegarLoop]: Abstraction has has 321 places, 0 transitions, 0 flow [2021-12-14 16:58:38,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 58.142857142857146) internal successors, (407), 7 states have internal predecessors, (407), 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) [2021-12-14 16:58:38,355 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-12-14 16:58:38,355 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (0 of 2 remaining) [2021-12-14 16:58:38,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-14 16:58:38,356 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:58:38,357 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 5 thread instances [2021-12-14 16:58:38,357 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-14 16:58:38,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 04:58:38 BasicIcfg [2021-12-14 16:58:38,361 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-14 16:58:38,361 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-14 16:58:38,362 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-14 16:58:38,362 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-14 16:58:38,362 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:57:52" (3/4) ... [2021-12-14 16:58:38,364 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-14 16:58:38,368 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread [2021-12-14 16:58:38,371 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-12-14 16:58:38,371 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-12-14 16:58:38,371 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-14 16:58:38,371 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-14 16:58:38,388 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-14 16:58:38,388 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-14 16:58:38,388 INFO L158 Benchmark]: Toolchain (without parser) took 46572.02ms. Allocated memory was 111.1MB in the beginning and 8.1GB in the end (delta: 7.9GB). Free memory was 85.6MB in the beginning and 6.7GB in the end (delta: -6.6GB). Peak memory consumption was 1.4GB. Max. memory is 16.1GB. [2021-12-14 16:58:38,389 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 111.1MB. Free memory is still 67.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 16:58:38,389 INFO L158 Benchmark]: CACSL2BoogieTranslator took 346.94ms. Allocated memory is still 111.1MB. Free memory was 85.5MB in the beginning and 77.6MB in the end (delta: 7.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-14 16:58:38,389 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.19ms. Allocated memory is still 111.1MB. Free memory was 77.4MB in the beginning and 75.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 16:58:38,389 INFO L158 Benchmark]: Boogie Preprocessor took 27.41ms. Allocated memory is still 111.1MB. Free memory was 75.5MB in the beginning and 74.2MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 16:58:38,389 INFO L158 Benchmark]: RCFGBuilder took 253.73ms. Allocated memory is still 111.1MB. Free memory was 74.2MB in the beginning and 63.2MB in the end (delta: 11.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-14 16:58:38,389 INFO L158 Benchmark]: TraceAbstraction took 45882.41ms. Allocated memory was 111.1MB in the beginning and 8.1GB in the end (delta: 7.9GB). Free memory was 62.7MB in the beginning and 6.7GB in the end (delta: -6.6GB). Peak memory consumption was 5.1GB. Max. memory is 16.1GB. [2021-12-14 16:58:38,390 INFO L158 Benchmark]: Witness Printer took 26.50ms. Allocated memory is still 8.1GB. Free memory was 6.7GB in the beginning and 6.7GB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 16:58:38,391 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 111.1MB. Free memory is still 67.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 346.94ms. Allocated memory is still 111.1MB. Free memory was 85.5MB in the beginning and 77.6MB in the end (delta: 7.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.19ms. Allocated memory is still 111.1MB. Free memory was 77.4MB in the beginning and 75.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.41ms. Allocated memory is still 111.1MB. Free memory was 75.5MB in the beginning and 74.2MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 253.73ms. Allocated memory is still 111.1MB. Free memory was 74.2MB in the beginning and 63.2MB in the end (delta: 11.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 45882.41ms. Allocated memory was 111.1MB in the beginning and 8.1GB in the end (delta: 7.9GB). Free memory was 62.7MB in the beginning and 6.7GB in the end (delta: -6.6GB). Peak memory consumption was 5.1GB. Max. memory is 16.1GB. * Witness Printer took 26.50ms. Allocated memory is still 8.1GB. Free memory was 6.7GB in the beginning and 6.7GB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 727]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 62 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 0.6s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4 mSDsluCounter, 8 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13 IncrementalHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 8 mSDtfsCounter, 13 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=95occurred in iteration=3, InterpolantAutomatonStates: 8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 114 NumberOfCodeBlocks, 114 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 76 ConstructedInterpolants, 0 QuantifiedInterpolants, 104 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 1/1 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 4 procedures, 68 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 0.7s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 21 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 21 mSDsluCounter, 16 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 49 IncrementalHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 12 mSDtfsCounter, 49 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=134occurred in iteration=3, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 173 NumberOfCodeBlocks, 173 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 159 ConstructedInterpolants, 0 QuantifiedInterpolants, 253 SizeOfPredicates, 2 NumberOfNonLiveVariables, 91 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 1/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 3 thread instances CFG has 5 procedures, 74 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 0.7s, OverallIterations: 5, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 31 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 31 mSDsluCounter, 19 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 7 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 59 IncrementalHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 14 mSDtfsCounter, 59 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=199occurred in iteration=4, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 206 NumberOfCodeBlocks, 206 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 181 ConstructedInterpolants, 0 QuantifiedInterpolants, 275 SizeOfPredicates, 2 NumberOfNonLiveVariables, 91 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 1/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 4 thread instances CFG has 6 procedures, 80 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5.8s, OverallIterations: 7, TraceHistogramMax: 5, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1059 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1059 mSDsluCounter, 588 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 493 mSDsCounter, 139 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 773 IncrementalHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 139 mSolverCounterUnsat, 98 mSDtfsCounter, 773 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 543 GetRequests, 375 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2577 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6892occurred in iteration=6, InterpolantAutomatonStates: 134, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 529 NumberOfCodeBlocks, 529 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 654 ConstructedInterpolants, 0 QuantifiedInterpolants, 1446 SizeOfPredicates, 26 NumberOfNonLiveVariables, 496 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 76/301 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 5 thread instances CFG has 7 procedures, 86 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 37.9s, OverallIterations: 10, TraceHistogramMax: 6, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 34.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2207 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2207 mSDsluCounter, 1285 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1094 mSDsCounter, 282 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1659 IncrementalHoareTripleChecker+Invalid, 1941 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 282 mSolverCounterUnsat, 195 mSDtfsCounter, 1659 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1027 GetRequests, 684 SyntacticMatches, 2 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7457 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24087occurred in iteration=9, InterpolantAutomatonStates: 290, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 945 NumberOfCodeBlocks, 945 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 1244 ConstructedInterpolants, 0 QuantifiedInterpolants, 3284 SizeOfPredicates, 48 NumberOfNonLiveVariables, 941 ConjunctsInSsa, 60 ConjunctsInUnsatCore, 21 InterpolantComputations, 5 PerfectInterpolantSequences, 455/1403 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-14 16:58:38,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE