./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-time-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/chl-time-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 72bbcf79bf9ab9dc66dc1f84247eb131a6de5c94da8e4a071481d48ca23ad8fa --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:42:58,052 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:42:58,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:42:58,109 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:42:58,110 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:42:58,113 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:42:58,114 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:42:58,118 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:42:58,119 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:42:58,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:42:58,123 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:42:58,124 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:42:58,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:42:58,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:42:58,127 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:42:58,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:42:58,130 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:42:58,131 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:42:58,132 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:42:58,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:42:58,137 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:42:58,138 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:42:58,139 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:42:58,140 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:42:58,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:42:58,146 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:42:58,147 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:42:58,147 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:42:58,148 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:42:58,149 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:42:58,149 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:42:58,150 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:42:58,151 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:42:58,152 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:42:58,152 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:42:58,153 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:42:58,153 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:42:58,153 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:42:58,153 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:42:58,154 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:42:58,155 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:42:58,156 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:42:58,180 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:42:58,180 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:42:58,181 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:42:58,181 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:42:58,181 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:42:58,181 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:42:58,182 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:42:58,182 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:42:58,182 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:42:58,182 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:42:58,183 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:42:58,183 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:42:58,183 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:42:58,183 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:42:58,183 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:42:58,184 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:42:58,184 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:42:58,184 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:42:58,184 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:42:58,184 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:42:58,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:42:58,184 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:42:58,185 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:42:58,185 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:42:58,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:42:58,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:42:58,185 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:42:58,186 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:42:58,186 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:42:58,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:42:58,186 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:42:58,186 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:42:58,187 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:42:58,187 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:42:58,187 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72bbcf79bf9ab9dc66dc1f84247eb131a6de5c94da8e4a071481d48ca23ad8fa [2021-12-22 13:42:58,372 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:42:58,389 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:42:58,391 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:42:58,391 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:42:58,392 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:42:58,393 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-time-symm.wvr.c [2021-12-22 13:42:58,449 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/645e92363/29b6b5ff65b0461fb6c914db61c441b5/FLAG2f2673ba7 [2021-12-22 13:42:58,782 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:42:58,782 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-time-symm.wvr.c [2021-12-22 13:42:58,787 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/645e92363/29b6b5ff65b0461fb6c914db61c441b5/FLAG2f2673ba7 [2021-12-22 13:42:58,797 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/645e92363/29b6b5ff65b0461fb6c914db61c441b5 [2021-12-22 13:42:58,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:42:58,800 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:42:58,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:42:58,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:42:58,806 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:42:58,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:42:58" (1/1) ... [2021-12-22 13:42:58,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@449a8ce3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:58, skipping insertion in model container [2021-12-22 13:42:58,807 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:42:58" (1/1) ... [2021-12-22 13:42:58,812 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:42:58,826 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:42:58,943 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-time-symm.wvr.c[2494,2507] [2021-12-22 13:42:58,947 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:42:58,952 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:42:58,965 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-time-symm.wvr.c[2494,2507] [2021-12-22 13:42:58,966 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:42:58,976 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:42:58,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:58 WrapperNode [2021-12-22 13:42:58,976 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:42:58,977 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:42:58,977 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:42:58,977 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:42:58,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:58" (1/1) ... [2021-12-22 13:42:58,987 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:58" (1/1) ... [2021-12-22 13:42:59,001 INFO L137 Inliner]: procedures = 22, calls = 29, calls flagged for inlining = 9, calls inlined = 15, statements flattened = 164 [2021-12-22 13:42:59,002 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:42:59,003 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:42:59,003 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:42:59,003 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:42:59,008 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:58" (1/1) ... [2021-12-22 13:42:59,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:58" (1/1) ... [2021-12-22 13:42:59,011 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:58" (1/1) ... [2021-12-22 13:42:59,012 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:58" (1/1) ... [2021-12-22 13:42:59,019 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:58" (1/1) ... [2021-12-22 13:42:59,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:58" (1/1) ... [2021-12-22 13:42:59,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:58" (1/1) ... [2021-12-22 13:42:59,031 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:42:59,036 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:42:59,037 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:42:59,037 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:42:59,038 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:58" (1/1) ... [2021-12-22 13:42:59,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:42:59,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:42:59,061 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) [2021-12-22 13:42:59,076 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 [2021-12-22 13:42:59,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:42:59,099 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-22 13:42:59,099 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-22 13:42:59,099 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-22 13:42:59,099 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-22 13:42:59,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:42:59,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 13:42:59,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 13:42:59,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-22 13:42:59,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-22 13:42:59,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:42:59,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:42:59,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 13:42:59,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 13:42:59,101 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-22 13:42:59,194 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:42:59,212 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:42:59,429 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:42:59,627 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:42:59,627 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 13:42:59,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:42:59 BoogieIcfgContainer [2021-12-22 13:42:59,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:42:59,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:42:59,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:42:59,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:42:59,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:42:58" (1/3) ... [2021-12-22 13:42:59,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d072c3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:42:59, skipping insertion in model container [2021-12-22 13:42:59,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:58" (2/3) ... [2021-12-22 13:42:59,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d072c3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:42:59, skipping insertion in model container [2021-12-22 13:42:59,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:42:59" (3/3) ... [2021-12-22 13:42:59,636 INFO L111 eAbstractionObserver]: Analyzing ICFG chl-time-symm.wvr.c [2021-12-22 13:42:59,640 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-22 13:42:59,640 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:42:59,640 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 13:42:59,641 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-22 13:42:59,673 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,674 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,674 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,674 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,674 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,674 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,674 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,674 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,674 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,675 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,675 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,676 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,676 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,676 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,676 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,676 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,677 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,677 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,677 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,677 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,677 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,678 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,679 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,679 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,679 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,679 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,680 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,680 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,680 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,680 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,680 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,681 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,681 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,681 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,681 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,681 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,681 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,682 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,682 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,682 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,682 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,683 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,683 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,683 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,683 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,683 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,684 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,684 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,685 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,685 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,685 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,685 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,687 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,688 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,688 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,688 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,688 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,689 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,689 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,689 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ite3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,690 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~ret2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,690 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,690 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,690 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,691 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,691 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,691 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,691 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,692 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~a#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,692 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,692 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,692 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#in~b#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,692 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_minus_#res#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,692 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,692 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ite6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,692 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~ret5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:42:59,695 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-22 13:42:59,757 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:42:59,765 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 [2021-12-22 13:42:59,765 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-22 13:42:59,776 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 104 places, 102 transitions, 220 flow [2021-12-22 13:42:59,834 INFO L129 PetriNetUnfolder]: 5/100 cut-off events. [2021-12-22 13:42:59,834 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-22 13:42:59,836 INFO L84 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 100 events. 5/100 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 34 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2021-12-22 13:42:59,836 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 102 transitions, 220 flow [2021-12-22 13:42:59,840 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 91 transitions, 194 flow [2021-12-22 13:42:59,863 INFO L129 PetriNetUnfolder]: 5/90 cut-off events. [2021-12-22 13:42:59,864 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-22 13:42:59,864 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:42:59,865 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:42:59,869 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:42:59,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:42:59,875 INFO L85 PathProgramCache]: Analyzing trace with hash -408130587, now seen corresponding path program 1 times [2021-12-22 13:42:59,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:42:59,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835819328] [2021-12-22 13:42:59,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:42:59,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:00,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:00,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:00,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835819328] [2021-12-22 13:43:00,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835819328] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:00,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:00,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:43:00,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999188252] [2021-12-22 13:43:00,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:00,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:43:00,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:00,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:43:00,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:43:00,253 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 102 [2021-12-22 13:43:00,259 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 91 transitions, 194 flow. Second operand has 5 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:00,259 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:00,259 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 102 [2021-12-22 13:43:00,260 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:00,421 INFO L129 PetriNetUnfolder]: 8/165 cut-off events. [2021-12-22 13:43:00,421 INFO L130 PetriNetUnfolder]: For 21/24 co-relation queries the response was YES. [2021-12-22 13:43:00,422 INFO L84 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 165 events. 8/165 cut-off events. For 21/24 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 353 event pairs, 0 based on Foata normal form. 5/158 useless extension candidates. Maximal degree in co-relation 61. Up to 16 conditions per place. [2021-12-22 13:43:00,425 INFO L132 encePairwiseOnDemand]: 95/102 looper letters, 35 selfloop transitions, 5 changer transitions 1/104 dead transitions. [2021-12-22 13:43:00,425 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 104 transitions, 309 flow [2021-12-22 13:43:00,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:43:00,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-22 13:43:00,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 490 transitions. [2021-12-22 13:43:00,441 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8006535947712419 [2021-12-22 13:43:00,442 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 490 transitions. [2021-12-22 13:43:00,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 490 transitions. [2021-12-22 13:43:00,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:00,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 490 transitions. [2021-12-22 13:43:00,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.66666666666667) internal successors, (490), 6 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:00,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 102.0) internal successors, (714), 7 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:00,460 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 102.0) internal successors, (714), 7 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:00,461 INFO L186 Difference]: Start difference. First operand has 93 places, 91 transitions, 194 flow. Second operand 6 states and 490 transitions. [2021-12-22 13:43:00,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 104 transitions, 309 flow [2021-12-22 13:43:00,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 104 transitions, 295 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-22 13:43:00,468 INFO L242 Difference]: Finished difference. Result has 97 places, 93 transitions, 218 flow [2021-12-22 13:43:00,470 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=218, PETRI_PLACES=97, PETRI_TRANSITIONS=93} [2021-12-22 13:43:00,473 INFO L334 CegarLoopForPetriNet]: 93 programPoint places, 4 predicate places. [2021-12-22 13:43:00,473 INFO L470 AbstractCegarLoop]: Abstraction has has 97 places, 93 transitions, 218 flow [2021-12-22 13:43:00,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:00,474 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:00,474 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:00,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:43:00,475 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:00,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:00,475 INFO L85 PathProgramCache]: Analyzing trace with hash 2065107161, now seen corresponding path program 2 times [2021-12-22 13:43:00,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:00,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192639269] [2021-12-22 13:43:00,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:00,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:00,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:00,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:00,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:00,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192639269] [2021-12-22 13:43:00,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192639269] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:00,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:00,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:43:00,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567058691] [2021-12-22 13:43:00,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:00,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:43:00,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:00,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:43:00,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:43:00,624 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 102 [2021-12-22 13:43:00,624 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 93 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:00,624 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:00,624 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 102 [2021-12-22 13:43:00,625 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:00,763 INFO L129 PetriNetUnfolder]: 8/163 cut-off events. [2021-12-22 13:43:00,764 INFO L130 PetriNetUnfolder]: For 22/25 co-relation queries the response was YES. [2021-12-22 13:43:00,765 INFO L84 FinitePrefix]: Finished finitePrefix Result has 240 conditions, 163 events. 8/163 cut-off events. For 22/25 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 332 event pairs, 1 based on Foata normal form. 3/163 useless extension candidates. Maximal degree in co-relation 167. Up to 19 conditions per place. [2021-12-22 13:43:00,765 INFO L132 encePairwiseOnDemand]: 96/102 looper letters, 35 selfloop transitions, 7 changer transitions 0/105 dead transitions. [2021-12-22 13:43:00,766 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 105 transitions, 339 flow [2021-12-22 13:43:00,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:43:00,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-22 13:43:00,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 486 transitions. [2021-12-22 13:43:00,768 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7941176470588235 [2021-12-22 13:43:00,768 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 486 transitions. [2021-12-22 13:43:00,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 486 transitions. [2021-12-22 13:43:00,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:00,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 486 transitions. [2021-12-22 13:43:00,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.0) internal successors, (486), 6 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:00,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 102.0) internal successors, (714), 7 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:00,771 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 102.0) internal successors, (714), 7 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:00,771 INFO L186 Difference]: Start difference. First operand has 97 places, 93 transitions, 218 flow. Second operand 6 states and 486 transitions. [2021-12-22 13:43:00,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 105 transitions, 339 flow [2021-12-22 13:43:00,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 105 transitions, 337 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-22 13:43:00,774 INFO L242 Difference]: Finished difference. Result has 103 places, 95 transitions, 258 flow [2021-12-22 13:43:00,775 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=103, PETRI_TRANSITIONS=95} [2021-12-22 13:43:00,775 INFO L334 CegarLoopForPetriNet]: 93 programPoint places, 10 predicate places. [2021-12-22 13:43:00,775 INFO L470 AbstractCegarLoop]: Abstraction has has 103 places, 95 transitions, 258 flow [2021-12-22 13:43:00,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:00,776 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:00,776 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:00,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:43:00,777 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:00,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:00,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1162863185, now seen corresponding path program 1 times [2021-12-22 13:43:00,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:00,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104236172] [2021-12-22 13:43:00,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:00,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:00,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:00,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104236172] [2021-12-22 13:43:00,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104236172] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:00,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:00,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:43:00,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459142024] [2021-12-22 13:43:00,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:00,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:43:00,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:00,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:43:00,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:43:00,911 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 102 [2021-12-22 13:43:00,911 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 95 transitions, 258 flow. Second operand has 5 states, 5 states have (on average 78.2) internal successors, (391), 5 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:00,911 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:00,912 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 102 [2021-12-22 13:43:00,912 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:01,022 INFO L129 PetriNetUnfolder]: 6/188 cut-off events. [2021-12-22 13:43:01,023 INFO L130 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2021-12-22 13:43:01,023 INFO L84 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 188 events. 6/188 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 507 event pairs, 0 based on Foata normal form. 1/187 useless extension candidates. Maximal degree in co-relation 190. Up to 12 conditions per place. [2021-12-22 13:43:01,024 INFO L132 encePairwiseOnDemand]: 94/102 looper letters, 33 selfloop transitions, 9 changer transitions 0/105 dead transitions. [2021-12-22 13:43:01,025 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 105 transitions, 373 flow [2021-12-22 13:43:01,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:43:01,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-22 13:43:01,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 558 transitions. [2021-12-22 13:43:01,026 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7815126050420168 [2021-12-22 13:43:01,026 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 558 transitions. [2021-12-22 13:43:01,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 558 transitions. [2021-12-22 13:43:01,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:01,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 558 transitions. [2021-12-22 13:43:01,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.71428571428571) internal successors, (558), 7 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 102.0) internal successors, (816), 8 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,029 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 102.0) internal successors, (816), 8 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,029 INFO L186 Difference]: Start difference. First operand has 103 places, 95 transitions, 258 flow. Second operand 7 states and 558 transitions. [2021-12-22 13:43:01,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 105 transitions, 373 flow [2021-12-22 13:43:01,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 105 transitions, 366 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-12-22 13:43:01,035 INFO L242 Difference]: Finished difference. Result has 109 places, 98 transitions, 288 flow [2021-12-22 13:43:01,039 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=288, PETRI_PLACES=109, PETRI_TRANSITIONS=98} [2021-12-22 13:43:01,041 INFO L334 CegarLoopForPetriNet]: 93 programPoint places, 16 predicate places. [2021-12-22 13:43:01,041 INFO L470 AbstractCegarLoop]: Abstraction has has 109 places, 98 transitions, 288 flow [2021-12-22 13:43:01,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.2) internal successors, (391), 5 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,041 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:01,042 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:01,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:43:01,042 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:01,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:01,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1992116849, now seen corresponding path program 1 times [2021-12-22 13:43:01,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:01,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276336954] [2021-12-22 13:43:01,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:01,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:01,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:01,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:01,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:01,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276336954] [2021-12-22 13:43:01,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276336954] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:01,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:01,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:43:01,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980878201] [2021-12-22 13:43:01,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:01,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:43:01,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:01,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:43:01,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:43:01,156 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 102 [2021-12-22 13:43:01,157 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 98 transitions, 288 flow. Second operand has 7 states, 7 states have (on average 81.42857142857143) internal successors, (570), 7 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,157 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:01,157 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 102 [2021-12-22 13:43:01,157 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:01,244 INFO L129 PetriNetUnfolder]: 8/232 cut-off events. [2021-12-22 13:43:01,244 INFO L130 PetriNetUnfolder]: For 65/68 co-relation queries the response was YES. [2021-12-22 13:43:01,244 INFO L84 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 232 events. 8/232 cut-off events. For 65/68 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 834 event pairs, 2 based on Foata normal form. 2/232 useless extension candidates. Maximal degree in co-relation 246. Up to 66 conditions per place. [2021-12-22 13:43:01,245 INFO L132 encePairwiseOnDemand]: 94/102 looper letters, 26 selfloop transitions, 4 changer transitions 4/110 dead transitions. [2021-12-22 13:43:01,245 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 110 transitions, 380 flow [2021-12-22 13:43:01,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:43:01,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-22 13:43:01,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 586 transitions. [2021-12-22 13:43:01,247 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8207282913165266 [2021-12-22 13:43:01,248 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 586 transitions. [2021-12-22 13:43:01,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 586 transitions. [2021-12-22 13:43:01,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:01,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 586 transitions. [2021-12-22 13:43:01,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 83.71428571428571) internal successors, (586), 7 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 102.0) internal successors, (816), 8 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,251 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 102.0) internal successors, (816), 8 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,251 INFO L186 Difference]: Start difference. First operand has 109 places, 98 transitions, 288 flow. Second operand 7 states and 586 transitions. [2021-12-22 13:43:01,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 110 transitions, 380 flow [2021-12-22 13:43:01,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 110 transitions, 374 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-22 13:43:01,257 INFO L242 Difference]: Finished difference. Result has 118 places, 101 transitions, 316 flow [2021-12-22 13:43:01,257 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=316, PETRI_PLACES=118, PETRI_TRANSITIONS=101} [2021-12-22 13:43:01,258 INFO L334 CegarLoopForPetriNet]: 93 programPoint places, 25 predicate places. [2021-12-22 13:43:01,258 INFO L470 AbstractCegarLoop]: Abstraction has has 118 places, 101 transitions, 316 flow [2021-12-22 13:43:01,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 81.42857142857143) internal successors, (570), 7 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,259 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:01,259 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:01,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:43:01,259 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:01,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:01,260 INFO L85 PathProgramCache]: Analyzing trace with hash 795161343, now seen corresponding path program 1 times [2021-12-22 13:43:01,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:01,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472096671] [2021-12-22 13:43:01,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:01,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:01,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:01,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:01,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:01,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472096671] [2021-12-22 13:43:01,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472096671] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:01,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:01,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:43:01,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922123363] [2021-12-22 13:43:01,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:01,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:43:01,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:01,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:43:01,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:43:01,339 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 102 [2021-12-22 13:43:01,339 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 101 transitions, 316 flow. Second operand has 7 states, 7 states have (on average 81.42857142857143) internal successors, (570), 7 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,339 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:01,340 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 102 [2021-12-22 13:43:01,340 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:01,420 INFO L129 PetriNetUnfolder]: 6/234 cut-off events. [2021-12-22 13:43:01,420 INFO L130 PetriNetUnfolder]: For 93/96 co-relation queries the response was YES. [2021-12-22 13:43:01,421 INFO L84 FinitePrefix]: Finished finitePrefix Result has 493 conditions, 234 events. 6/234 cut-off events. For 93/96 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 851 event pairs, 2 based on Foata normal form. 2/234 useless extension candidates. Maximal degree in co-relation 364. Up to 92 conditions per place. [2021-12-22 13:43:01,422 INFO L132 encePairwiseOnDemand]: 96/102 looper letters, 23 selfloop transitions, 0 changer transitions 10/106 dead transitions. [2021-12-22 13:43:01,422 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 106 transitions, 388 flow [2021-12-22 13:43:01,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:43:01,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-22 13:43:01,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 579 transitions. [2021-12-22 13:43:01,423 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8109243697478992 [2021-12-22 13:43:01,423 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 579 transitions. [2021-12-22 13:43:01,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 579 transitions. [2021-12-22 13:43:01,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:01,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 579 transitions. [2021-12-22 13:43:01,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 82.71428571428571) internal successors, (579), 7 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 102.0) internal successors, (816), 8 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,426 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 102.0) internal successors, (816), 8 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,426 INFO L186 Difference]: Start difference. First operand has 118 places, 101 transitions, 316 flow. Second operand 7 states and 579 transitions. [2021-12-22 13:43:01,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 106 transitions, 388 flow [2021-12-22 13:43:01,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 106 transitions, 376 flow, removed 5 selfloop flow, removed 4 redundant places. [2021-12-22 13:43:01,429 INFO L242 Difference]: Finished difference. Result has 122 places, 96 transitions, 287 flow [2021-12-22 13:43:01,429 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=287, PETRI_PLACES=122, PETRI_TRANSITIONS=96} [2021-12-22 13:43:01,430 INFO L334 CegarLoopForPetriNet]: 93 programPoint places, 29 predicate places. [2021-12-22 13:43:01,430 INFO L470 AbstractCegarLoop]: Abstraction has has 122 places, 96 transitions, 287 flow [2021-12-22 13:43:01,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 81.42857142857143) internal successors, (570), 7 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,430 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:01,431 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:01,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:43:01,431 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:01,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:01,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1527220719, now seen corresponding path program 2 times [2021-12-22 13:43:01,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:01,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829950843] [2021-12-22 13:43:01,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:01,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:01,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:01,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:01,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:01,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829950843] [2021-12-22 13:43:01,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829950843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:01,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:01,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:43:01,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158321430] [2021-12-22 13:43:01,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:01,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:43:01,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:01,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:43:01,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:43:01,488 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 102 [2021-12-22 13:43:01,488 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 96 transitions, 287 flow. Second operand has 5 states, 5 states have (on average 78.2) internal successors, (391), 5 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,488 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:01,488 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 102 [2021-12-22 13:43:01,488 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:01,596 INFO L129 PetriNetUnfolder]: 6/201 cut-off events. [2021-12-22 13:43:01,597 INFO L130 PetriNetUnfolder]: For 67/70 co-relation queries the response was YES. [2021-12-22 13:43:01,597 INFO L84 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 201 events. 6/201 cut-off events. For 67/70 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 584 event pairs, 1 based on Foata normal form. 2/202 useless extension candidates. Maximal degree in co-relation 370. Up to 13 conditions per place. [2021-12-22 13:43:01,598 INFO L132 encePairwiseOnDemand]: 95/102 looper letters, 28 selfloop transitions, 9 changer transitions 2/103 dead transitions. [2021-12-22 13:43:01,598 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 103 transitions, 392 flow [2021-12-22 13:43:01,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:43:01,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-22 13:43:01,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 556 transitions. [2021-12-22 13:43:01,600 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7787114845938375 [2021-12-22 13:43:01,600 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 556 transitions. [2021-12-22 13:43:01,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 556 transitions. [2021-12-22 13:43:01,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:01,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 556 transitions. [2021-12-22 13:43:01,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.42857142857143) internal successors, (556), 7 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 102.0) internal successors, (816), 8 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,603 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 102.0) internal successors, (816), 8 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,603 INFO L186 Difference]: Start difference. First operand has 122 places, 96 transitions, 287 flow. Second operand 7 states and 556 transitions. [2021-12-22 13:43:01,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 103 transitions, 392 flow [2021-12-22 13:43:01,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 103 transitions, 358 flow, removed 13 selfloop flow, removed 9 redundant places. [2021-12-22 13:43:01,606 INFO L242 Difference]: Finished difference. Result has 114 places, 95 transitions, 280 flow [2021-12-22 13:43:01,606 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=280, PETRI_PLACES=114, PETRI_TRANSITIONS=95} [2021-12-22 13:43:01,606 INFO L334 CegarLoopForPetriNet]: 93 programPoint places, 21 predicate places. [2021-12-22 13:43:01,607 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 95 transitions, 280 flow [2021-12-22 13:43:01,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.2) internal successors, (391), 5 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,607 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:01,607 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:01,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 13:43:01,608 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:01,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:01,608 INFO L85 PathProgramCache]: Analyzing trace with hash -710130457, now seen corresponding path program 1 times [2021-12-22 13:43:01,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:01,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460999497] [2021-12-22 13:43:01,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:01,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:01,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:01,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:01,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:01,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460999497] [2021-12-22 13:43:01,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460999497] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:01,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:01,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:43:01,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453722898] [2021-12-22 13:43:01,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:01,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:43:01,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:01,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:43:01,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:43:01,666 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 102 [2021-12-22 13:43:01,667 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 95 transitions, 280 flow. Second operand has 5 states, 5 states have (on average 78.4) internal successors, (392), 5 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,667 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:01,667 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 102 [2021-12-22 13:43:01,667 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:01,735 INFO L129 PetriNetUnfolder]: 4/177 cut-off events. [2021-12-22 13:43:01,736 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2021-12-22 13:43:01,736 INFO L84 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 177 events. 4/177 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 435 event pairs, 0 based on Foata normal form. 1/178 useless extension candidates. Maximal degree in co-relation 287. Up to 16 conditions per place. [2021-12-22 13:43:01,737 INFO L132 encePairwiseOnDemand]: 98/102 looper letters, 32 selfloop transitions, 3 changer transitions 1/100 dead transitions. [2021-12-22 13:43:01,737 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 100 transitions, 359 flow [2021-12-22 13:43:01,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:43:01,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-22 13:43:01,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 405 transitions. [2021-12-22 13:43:01,738 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7941176470588235 [2021-12-22 13:43:01,738 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 405 transitions. [2021-12-22 13:43:01,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 405 transitions. [2021-12-22 13:43:01,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:01,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 405 transitions. [2021-12-22 13:43:01,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 102.0) internal successors, (612), 6 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,740 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 102.0) internal successors, (612), 6 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,740 INFO L186 Difference]: Start difference. First operand has 114 places, 95 transitions, 280 flow. Second operand 5 states and 405 transitions. [2021-12-22 13:43:01,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 100 transitions, 359 flow [2021-12-22 13:43:01,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 100 transitions, 344 flow, removed 1 selfloop flow, removed 5 redundant places. [2021-12-22 13:43:01,743 INFO L242 Difference]: Finished difference. Result has 113 places, 94 transitions, 266 flow [2021-12-22 13:43:01,743 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=113, PETRI_TRANSITIONS=94} [2021-12-22 13:43:01,743 INFO L334 CegarLoopForPetriNet]: 93 programPoint places, 20 predicate places. [2021-12-22 13:43:01,744 INFO L470 AbstractCegarLoop]: Abstraction has has 113 places, 94 transitions, 266 flow [2021-12-22 13:43:01,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.4) internal successors, (392), 5 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,744 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:01,744 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:01,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 13:43:01,744 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:01,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:01,745 INFO L85 PathProgramCache]: Analyzing trace with hash -2045674615, now seen corresponding path program 1 times [2021-12-22 13:43:01,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:01,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396959254] [2021-12-22 13:43:01,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:01,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:01,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:01,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:01,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:01,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396959254] [2021-12-22 13:43:01,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396959254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:01,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:01,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:43:01,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402159138] [2021-12-22 13:43:01,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:01,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:43:01,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:01,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:43:01,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:43:01,807 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 102 [2021-12-22 13:43:01,807 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 94 transitions, 266 flow. Second operand has 5 states, 5 states have (on average 78.4) internal successors, (392), 5 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,807 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:01,807 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 102 [2021-12-22 13:43:01,807 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:01,867 INFO L129 PetriNetUnfolder]: 4/159 cut-off events. [2021-12-22 13:43:01,868 INFO L130 PetriNetUnfolder]: For 40/43 co-relation queries the response was YES. [2021-12-22 13:43:01,868 INFO L84 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 159 events. 4/159 cut-off events. For 40/43 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 309 event pairs, 0 based on Foata normal form. 2/161 useless extension candidates. Maximal degree in co-relation 258. Up to 14 conditions per place. [2021-12-22 13:43:01,869 INFO L132 encePairwiseOnDemand]: 95/102 looper letters, 27 selfloop transitions, 7 changer transitions 0/98 dead transitions. [2021-12-22 13:43:01,869 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 98 transitions, 341 flow [2021-12-22 13:43:01,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:43:01,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-22 13:43:01,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 477 transitions. [2021-12-22 13:43:01,870 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7794117647058824 [2021-12-22 13:43:01,870 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 477 transitions. [2021-12-22 13:43:01,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 477 transitions. [2021-12-22 13:43:01,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:01,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 477 transitions. [2021-12-22 13:43:01,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.5) internal successors, (477), 6 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 102.0) internal successors, (714), 7 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,873 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 102.0) internal successors, (714), 7 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,873 INFO L186 Difference]: Start difference. First operand has 113 places, 94 transitions, 266 flow. Second operand 6 states and 477 transitions. [2021-12-22 13:43:01,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 98 transitions, 341 flow [2021-12-22 13:43:01,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 98 transitions, 336 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-22 13:43:01,875 INFO L242 Difference]: Finished difference. Result has 115 places, 95 transitions, 283 flow [2021-12-22 13:43:01,875 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=283, PETRI_PLACES=115, PETRI_TRANSITIONS=95} [2021-12-22 13:43:01,876 INFO L334 CegarLoopForPetriNet]: 93 programPoint places, 22 predicate places. [2021-12-22 13:43:01,876 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 95 transitions, 283 flow [2021-12-22 13:43:01,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.4) internal successors, (392), 5 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,876 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:01,876 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:01,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 13:43:01,877 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:01,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:01,877 INFO L85 PathProgramCache]: Analyzing trace with hash -367310015, now seen corresponding path program 1 times [2021-12-22 13:43:01,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:01,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14702975] [2021-12-22 13:43:01,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:01,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:01,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:01,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:01,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14702975] [2021-12-22 13:43:01,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14702975] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:01,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:01,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:43:01,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33666542] [2021-12-22 13:43:01,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:01,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:43:01,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:01,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:43:01,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:43:01,952 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 102 [2021-12-22 13:43:01,953 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 95 transitions, 283 flow. Second operand has 8 states, 8 states have (on average 78.375) internal successors, (627), 8 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:01,953 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:01,953 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 102 [2021-12-22 13:43:01,953 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:02,050 INFO L129 PetriNetUnfolder]: 3/148 cut-off events. [2021-12-22 13:43:02,050 INFO L130 PetriNetUnfolder]: For 57/60 co-relation queries the response was YES. [2021-12-22 13:43:02,051 INFO L84 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 148 events. 3/148 cut-off events. For 57/60 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 253 event pairs, 2 based on Foata normal form. 2/148 useless extension candidates. Maximal degree in co-relation 277. Up to 39 conditions per place. [2021-12-22 13:43:02,051 INFO L132 encePairwiseOnDemand]: 93/102 looper letters, 26 selfloop transitions, 4 changer transitions 11/106 dead transitions. [2021-12-22 13:43:02,051 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 106 transitions, 379 flow [2021-12-22 13:43:02,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 13:43:02,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-22 13:43:02,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 644 transitions. [2021-12-22 13:43:02,053 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7892156862745098 [2021-12-22 13:43:02,053 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 644 transitions. [2021-12-22 13:43:02,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 644 transitions. [2021-12-22 13:43:02,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:02,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 644 transitions. [2021-12-22 13:43:02,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 80.5) internal successors, (644), 8 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:02,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 102.0) internal successors, (918), 9 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:02,056 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 102.0) internal successors, (918), 9 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:02,056 INFO L186 Difference]: Start difference. First operand has 115 places, 95 transitions, 283 flow. Second operand 8 states and 644 transitions. [2021-12-22 13:43:02,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 106 transitions, 379 flow [2021-12-22 13:43:02,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 106 transitions, 373 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-22 13:43:02,059 INFO L242 Difference]: Finished difference. Result has 125 places, 89 transitions, 256 flow [2021-12-22 13:43:02,059 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=256, PETRI_PLACES=125, PETRI_TRANSITIONS=89} [2021-12-22 13:43:02,060 INFO L334 CegarLoopForPetriNet]: 93 programPoint places, 32 predicate places. [2021-12-22 13:43:02,060 INFO L470 AbstractCegarLoop]: Abstraction has has 125 places, 89 transitions, 256 flow [2021-12-22 13:43:02,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 78.375) internal successors, (627), 8 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:02,060 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:02,061 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:02,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 13:43:02,061 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:02,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:02,062 INFO L85 PathProgramCache]: Analyzing trace with hash -953494737, now seen corresponding path program 2 times [2021-12-22 13:43:02,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:02,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570480212] [2021-12-22 13:43:02,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:02,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:02,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:02,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:02,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:02,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570480212] [2021-12-22 13:43:02,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570480212] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:02,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:02,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:43:02,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208287189] [2021-12-22 13:43:02,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:02,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:43:02,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:02,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:43:02,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:43:02,143 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 102 [2021-12-22 13:43:02,143 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 89 transitions, 256 flow. Second operand has 5 states, 5 states have (on average 78.4) internal successors, (392), 5 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:02,144 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:02,144 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 102 [2021-12-22 13:43:02,144 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:02,213 INFO L129 PetriNetUnfolder]: 0/85 cut-off events. [2021-12-22 13:43:02,213 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2021-12-22 13:43:02,213 INFO L84 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 85 events. 0/85 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 1/86 useless extension candidates. Maximal degree in co-relation 0. Up to 14 conditions per place. [2021-12-22 13:43:02,214 INFO L132 encePairwiseOnDemand]: 96/102 looper letters, 18 selfloop transitions, 4 changer transitions 4/85 dead transitions. [2021-12-22 13:43:02,214 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 85 transitions, 283 flow [2021-12-22 13:43:02,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:43:02,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-22 13:43:02,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 469 transitions. [2021-12-22 13:43:02,215 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7663398692810458 [2021-12-22 13:43:02,215 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 469 transitions. [2021-12-22 13:43:02,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 469 transitions. [2021-12-22 13:43:02,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:02,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 469 transitions. [2021-12-22 13:43:02,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 78.16666666666667) internal successors, (469), 6 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:02,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 102.0) internal successors, (714), 7 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:02,218 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 102.0) internal successors, (714), 7 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:02,218 INFO L186 Difference]: Start difference. First operand has 125 places, 89 transitions, 256 flow. Second operand 6 states and 469 transitions. [2021-12-22 13:43:02,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 85 transitions, 283 flow [2021-12-22 13:43:02,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 85 transitions, 238 flow, removed 10 selfloop flow, removed 19 redundant places. [2021-12-22 13:43:02,219 INFO L242 Difference]: Finished difference. Result has 101 places, 81 transitions, 186 flow [2021-12-22 13:43:02,220 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=186, PETRI_PLACES=101, PETRI_TRANSITIONS=81} [2021-12-22 13:43:02,220 INFO L334 CegarLoopForPetriNet]: 93 programPoint places, 8 predicate places. [2021-12-22 13:43:02,220 INFO L470 AbstractCegarLoop]: Abstraction has has 101 places, 81 transitions, 186 flow [2021-12-22 13:43:02,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.4) internal successors, (392), 5 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:02,221 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:43:02,221 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:43:02,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 13:43:02,221 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:43:02,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:43:02,222 INFO L85 PathProgramCache]: Analyzing trace with hash -525411835, now seen corresponding path program 2 times [2021-12-22 13:43:02,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:43:02,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821919291] [2021-12-22 13:43:02,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:43:02,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:43:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:43:02,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:43:02,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:43:02,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821919291] [2021-12-22 13:43:02,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821919291] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:43:02,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:43:02,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:43:02,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903534062] [2021-12-22 13:43:02,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:43:02,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:43:02,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:43:02,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:43:02,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:43:02,278 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 102 [2021-12-22 13:43:02,279 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 81 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 78.4) internal successors, (392), 5 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:02,279 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:43:02,279 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 102 [2021-12-22 13:43:02,279 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:43:02,335 INFO L129 PetriNetUnfolder]: 0/67 cut-off events. [2021-12-22 13:43:02,335 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-22 13:43:02,335 INFO L84 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 67 events. 0/67 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 13 event pairs, 0 based on Foata normal form. 1/68 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2021-12-22 13:43:02,335 INFO L132 encePairwiseOnDemand]: 96/102 looper letters, 0 selfloop transitions, 0 changer transitions 67/67 dead transitions. [2021-12-22 13:43:02,336 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 67 transitions, 196 flow [2021-12-22 13:43:02,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:43:02,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-22 13:43:02,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 466 transitions. [2021-12-22 13:43:02,337 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.761437908496732 [2021-12-22 13:43:02,337 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 466 transitions. [2021-12-22 13:43:02,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 466 transitions. [2021-12-22 13:43:02,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:43:02,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 466 transitions. [2021-12-22 13:43:02,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 77.66666666666667) internal successors, (466), 6 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:02,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 102.0) internal successors, (714), 7 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:02,344 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 102.0) internal successors, (714), 7 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:02,344 INFO L186 Difference]: Start difference. First operand has 101 places, 81 transitions, 186 flow. Second operand 6 states and 466 transitions. [2021-12-22 13:43:02,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 67 transitions, 196 flow [2021-12-22 13:43:02,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 67 transitions, 183 flow, removed 1 selfloop flow, removed 5 redundant places. [2021-12-22 13:43:02,345 INFO L242 Difference]: Finished difference. Result has 79 places, 0 transitions, 0 flow [2021-12-22 13:43:02,345 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=79, PETRI_TRANSITIONS=0} [2021-12-22 13:43:02,345 INFO L334 CegarLoopForPetriNet]: 93 programPoint places, -14 predicate places. [2021-12-22 13:43:02,346 INFO L470 AbstractCegarLoop]: Abstraction has has 79 places, 0 transitions, 0 flow [2021-12-22 13:43:02,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.4) internal successors, (392), 5 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:43:02,348 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2021-12-22 13:43:02,348 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2021-12-22 13:43:02,348 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2021-12-22 13:43:02,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 13:43:02,351 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 1, 1, 1] [2021-12-22 13:43:02,352 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-12-22 13:43:02,352 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-22 13:43:02,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 01:43:02 BasicIcfg [2021-12-22 13:43:02,354 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-22 13:43:02,354 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-22 13:43:02,354 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-22 13:43:02,355 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-22 13:43:02,355 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:42:59" (3/4) ... [2021-12-22 13:43:02,357 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-22 13:43:02,360 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-12-22 13:43:02,360 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-12-22 13:43:02,363 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2021-12-22 13:43:02,363 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-12-22 13:43:02,363 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-22 13:43:02,363 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-22 13:43:02,384 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-22 13:43:02,384 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-22 13:43:02,385 INFO L158 Benchmark]: Toolchain (without parser) took 3584.28ms. Allocated memory was 115.3MB in the beginning and 172.0MB in the end (delta: 56.6MB). Free memory was 80.7MB in the beginning and 139.4MB in the end (delta: -58.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 13:43:02,385 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 75.5MB. Free memory was 33.1MB in the beginning and 33.1MB in the end (delta: 31.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 13:43:02,385 INFO L158 Benchmark]: CACSL2BoogieTranslator took 173.39ms. Allocated memory is still 115.3MB. Free memory was 80.5MB in the beginning and 88.5MB in the end (delta: -8.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 13:43:02,385 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.95ms. Allocated memory is still 115.3MB. Free memory was 88.5MB in the beginning and 86.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 13:43:02,385 INFO L158 Benchmark]: Boogie Preprocessor took 33.32ms. Allocated memory is still 115.3MB. Free memory was 86.5MB in the beginning and 85.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 13:43:02,386 INFO L158 Benchmark]: RCFGBuilder took 593.39ms. Allocated memory is still 115.3MB. Free memory was 85.3MB in the beginning and 49.3MB in the end (delta: 36.0MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. [2021-12-22 13:43:02,386 INFO L158 Benchmark]: TraceAbstraction took 2722.89ms. Allocated memory was 115.3MB in the beginning and 172.0MB in the end (delta: 56.6MB). Free memory was 48.7MB in the beginning and 142.6MB in the end (delta: -93.9MB). Peak memory consumption was 60.9MB. Max. memory is 16.1GB. [2021-12-22 13:43:02,386 INFO L158 Benchmark]: Witness Printer took 29.98ms. Allocated memory is still 172.0MB. Free memory was 142.6MB in the beginning and 139.4MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-22 13:43:02,387 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 75.5MB. Free memory was 33.1MB in the beginning and 33.1MB in the end (delta: 31.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 173.39ms. Allocated memory is still 115.3MB. Free memory was 80.5MB in the beginning and 88.5MB in the end (delta: -8.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.95ms. Allocated memory is still 115.3MB. Free memory was 88.5MB in the beginning and 86.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.32ms. Allocated memory is still 115.3MB. Free memory was 86.5MB in the beginning and 85.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 593.39ms. Allocated memory is still 115.3MB. Free memory was 85.3MB in the beginning and 49.3MB in the end (delta: 36.0MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. * TraceAbstraction took 2722.89ms. Allocated memory was 115.3MB in the beginning and 172.0MB in the end (delta: 56.6MB). Free memory was 48.7MB in the beginning and 142.6MB in the end (delta: -93.9MB). Peak memory consumption was 60.9MB. Max. memory is 16.1GB. * Witness Printer took 29.98ms. Allocated memory is still 172.0MB. Free memory was 142.6MB in the beginning and 139.4MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. 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 - PositiveResult [Line: 80]: 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 5 procedures, 108 locations, 3 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: 2.6s, OverallIterations: 11, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 248 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 248 mSDsluCounter, 447 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 469 mSDsCounter, 15 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 662 IncrementalHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 15 mSolverCounterUnsat, 152 mSDtfsCounter, 662 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=316occurred in iteration=4, InterpolantAutomatonStates: 71, 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, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 875 NumberOfCodeBlocks, 875 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 864 ConstructedInterpolants, 0 QuantifiedInterpolants, 2350 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 11 PerfectInterpolantSequences, 0/0 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! [2021-12-22 13:43:02,412 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