./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-queue-add-2.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 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 03:08:33,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 03:08:33,981 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 03:08:34,055 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 03:08:34,056 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 03:08:34,059 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 03:08:34,061 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 03:08:34,064 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 03:08:34,065 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 03:08:34,072 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 03:08:34,072 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 03:08:34,074 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 03:08:34,074 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 03:08:34,076 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 03:08:34,078 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 03:08:34,080 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 03:08:34,082 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 03:08:34,082 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 03:08:34,085 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 03:08:34,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 03:08:34,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 03:08:34,094 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 03:08:34,099 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 03:08:34,100 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 03:08:34,105 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 03:08:34,106 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 03:08:34,106 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 03:08:34,107 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 03:08:34,108 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 03:08:34,108 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 03:08:34,109 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 03:08:34,109 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 03:08:34,111 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 03:08:34,111 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 03:08:34,112 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 03:08:34,113 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 03:08:34,113 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 03:08:34,113 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 03:08:34,114 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 03:08:34,114 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 03:08:34,116 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 03:08:34,117 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 03:08:34,146 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 03:08:34,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 03:08:34,147 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 03:08:34,147 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 03:08:34,148 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 03:08:34,148 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 03:08:34,148 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 03:08:34,149 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 03:08:34,149 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 03:08:34,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 03:08:34,150 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 03:08:34,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 03:08:34,150 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 03:08:34,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 03:08:34,150 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 03:08:34,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 03:08:34,151 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 03:08:34,151 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 03:08:34,151 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 03:08:34,151 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 03:08:34,151 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 03:08:34,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 03:08:34,152 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 03:08:34,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 03:08:34,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:08:34,152 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 03:08:34,153 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 03:08:34,154 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 03:08:34,154 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 03:08:34,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 03:08:34,154 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 03:08:34,154 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 03:08:34,155 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 03:08:34,155 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 03:08:34,155 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df [2021-12-16 03:08:34,408 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 03:08:34,433 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 03:08:34,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 03:08:34,447 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 03:08:34,448 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 03:08:34,449 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2021-12-16 03:08:34,505 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/476defd6a/20dde859c7de4f27ada39f4e6fba0d22/FLAG0fdecdff6 [2021-12-16 03:08:34,894 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 03:08:34,894 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2021-12-16 03:08:34,902 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/476defd6a/20dde859c7de4f27ada39f4e6fba0d22/FLAG0fdecdff6 [2021-12-16 03:08:34,918 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/476defd6a/20dde859c7de4f27ada39f4e6fba0d22 [2021-12-16 03:08:34,920 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 03:08:34,921 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 03:08:34,922 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 03:08:34,923 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 03:08:34,928 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 03:08:34,929 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:08:34" (1/1) ... [2021-12-16 03:08:34,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ee8e996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:08:34, skipping insertion in model container [2021-12-16 03:08:34,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:08:34" (1/1) ... [2021-12-16 03:08:34,936 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 03:08:34,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 03:08:35,144 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c[2696,2709] [2021-12-16 03:08:35,161 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:08:35,169 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 03:08:35,208 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c[2696,2709] [2021-12-16 03:08:35,214 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:08:35,233 INFO L208 MainTranslator]: Completed translation [2021-12-16 03:08:35,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:08:35 WrapperNode [2021-12-16 03:08:35,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 03:08:35,235 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 03:08:35,235 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 03:08:35,236 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 03:08:35,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:08:35" (1/1) ... [2021-12-16 03:08:35,256 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:08:35" (1/1) ... [2021-12-16 03:08:35,284 INFO L137 Inliner]: procedures = 24, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 154 [2021-12-16 03:08:35,285 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 03:08:35,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 03:08:35,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 03:08:35,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 03:08:35,293 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:08:35" (1/1) ... [2021-12-16 03:08:35,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:08:35" (1/1) ... [2021-12-16 03:08:35,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:08:35" (1/1) ... [2021-12-16 03:08:35,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:08:35" (1/1) ... [2021-12-16 03:08:35,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:08:35" (1/1) ... [2021-12-16 03:08:35,317 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:08:35" (1/1) ... [2021-12-16 03:08:35,319 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:08:35" (1/1) ... [2021-12-16 03:08:35,321 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 03:08:35,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 03:08:35,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 03:08:35,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 03:08:35,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:08:35" (1/1) ... [2021-12-16 03:08:35,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:08:35,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:08:35,349 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) [2021-12-16 03:08:35,356 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 [2021-12-16 03:08:35,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 03:08:35,386 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-16 03:08:35,386 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-16 03:08:35,386 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-16 03:08:35,386 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-16 03:08:35,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 03:08:35,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 03:08:35,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 03:08:35,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-16 03:08:35,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-16 03:08:35,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 03:08:35,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 03:08:35,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 03:08:35,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 03:08:35,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 03:08:35,389 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-16 03:08:35,486 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 03:08:35,488 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 03:08:35,758 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 03:08:35,825 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 03:08:35,825 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-16 03:08:35,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:08:35 BoogieIcfgContainer [2021-12-16 03:08:35,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 03:08:35,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 03:08:35,829 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 03:08:35,831 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 03:08:35,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 03:08:34" (1/3) ... [2021-12-16 03:08:35,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dd6e2e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:08:35, skipping insertion in model container [2021-12-16 03:08:35,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:08:35" (2/3) ... [2021-12-16 03:08:35,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dd6e2e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:08:35, skipping insertion in model container [2021-12-16 03:08:35,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:08:35" (3/3) ... [2021-12-16 03:08:35,834 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2021-12-16 03:08:35,838 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-16 03:08:35,838 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 03:08:35,838 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 03:08:35,839 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-16 03:08:35,882 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,882 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,883 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,883 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,883 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,884 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,884 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,884 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,885 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,885 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,885 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,885 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,885 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,885 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,886 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,886 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,886 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,886 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,887 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,887 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,887 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,888 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,888 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,889 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,889 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,889 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,889 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,890 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,890 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,890 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,890 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,890 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,890 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,891 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,891 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,891 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,892 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,892 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,893 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,893 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,893 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,893 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,893 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,893 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,894 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,894 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,894 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,894 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,894 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,895 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,895 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,895 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,896 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,896 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,897 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,897 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,898 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,898 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,902 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,903 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,903 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,904 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,904 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,904 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,904 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,906 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,907 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,907 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,907 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,907 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,908 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,908 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,908 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,908 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,908 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:35,912 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-16 03:08:35,971 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 03:08:35,979 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 [2021-12-16 03:08:35,980 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-16 03:08:35,996 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 132 places, 136 transitions, 288 flow [2021-12-16 03:08:36,075 INFO L129 PetriNetUnfolder]: 11/134 cut-off events. [2021-12-16 03:08:36,076 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-16 03:08:36,081 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 134 events. 11/134 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 99. Up to 3 conditions per place. [2021-12-16 03:08:36,081 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 136 transitions, 288 flow [2021-12-16 03:08:36,096 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 125 transitions, 262 flow [2021-12-16 03:08:36,115 INFO L129 PetriNetUnfolder]: 11/124 cut-off events. [2021-12-16 03:08:36,115 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-16 03:08:36,115 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:36,116 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:36,117 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:08:36,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:36,123 INFO L85 PathProgramCache]: Analyzing trace with hash 321786498, now seen corresponding path program 1 times [2021-12-16 03:08:36,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:36,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88120485] [2021-12-16 03:08:36,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:36,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:36,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:36,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:36,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:36,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88120485] [2021-12-16 03:08:36,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88120485] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:08:36,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:08:36,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 03:08:36,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796755997] [2021-12-16 03:08:36,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:08:36,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 03:08:36,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:36,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 03:08:36,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 03:08:36,392 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 136 [2021-12-16 03:08:36,397 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 125 transitions, 262 flow. Second operand has 2 states, 2 states have (on average 123.5) internal successors, (247), 2 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:36,397 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:36,397 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 136 [2021-12-16 03:08:36,398 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:36,487 INFO L129 PetriNetUnfolder]: 12/147 cut-off events. [2021-12-16 03:08:36,487 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2021-12-16 03:08:36,489 INFO L84 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 147 events. 12/147 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 172 event pairs, 5 based on Foata normal form. 14/150 useless extension candidates. Maximal degree in co-relation 97. Up to 22 conditions per place. [2021-12-16 03:08:36,492 INFO L132 encePairwiseOnDemand]: 128/136 looper letters, 7 selfloop transitions, 0 changer transitions 4/117 dead transitions. [2021-12-16 03:08:36,492 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 117 transitions, 260 flow [2021-12-16 03:08:36,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 03:08:36,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-16 03:08:36,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 255 transitions. [2021-12-16 03:08:36,510 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9375 [2021-12-16 03:08:36,511 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 255 transitions. [2021-12-16 03:08:36,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 255 transitions. [2021-12-16 03:08:36,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:36,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 255 transitions. [2021-12-16 03:08:36,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 127.5) internal successors, (255), 2 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:36,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:36,529 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:36,530 INFO L186 Difference]: Start difference. First operand has 121 places, 125 transitions, 262 flow. Second operand 2 states and 255 transitions. [2021-12-16 03:08:36,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 117 transitions, 260 flow [2021-12-16 03:08:36,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 117 transitions, 252 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-16 03:08:36,539 INFO L242 Difference]: Finished difference. Result has 118 places, 113 transitions, 230 flow [2021-12-16 03:08:36,541 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=230, PETRI_PLACES=118, PETRI_TRANSITIONS=113} [2021-12-16 03:08:36,548 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, -3 predicate places. [2021-12-16 03:08:36,548 INFO L470 AbstractCegarLoop]: Abstraction has has 118 places, 113 transitions, 230 flow [2021-12-16 03:08:36,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 123.5) internal successors, (247), 2 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:36,549 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:36,549 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:36,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 03:08:36,550 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:08:36,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:36,551 INFO L85 PathProgramCache]: Analyzing trace with hash -632914253, now seen corresponding path program 1 times [2021-12-16 03:08:36,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:36,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096675838] [2021-12-16 03:08:36,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:36,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:36,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:36,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:36,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:36,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096675838] [2021-12-16 03:08:36,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096675838] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:08:36,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:08:36,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:08:36,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75959638] [2021-12-16 03:08:36,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:08:36,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:08:36,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:36,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:08:36,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:08:36,788 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 136 [2021-12-16 03:08:36,789 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 113 transitions, 230 flow. Second operand has 6 states, 6 states have (on average 108.66666666666667) internal successors, (652), 6 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:36,789 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:36,789 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 136 [2021-12-16 03:08:36,790 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:36,922 INFO L129 PetriNetUnfolder]: 12/179 cut-off events. [2021-12-16 03:08:36,922 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-16 03:08:36,923 INFO L84 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 179 events. 12/179 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 250 event pairs, 5 based on Foata normal form. 5/175 useless extension candidates. Maximal degree in co-relation 227. Up to 31 conditions per place. [2021-12-16 03:08:36,924 INFO L132 encePairwiseOnDemand]: 126/136 looper letters, 19 selfloop transitions, 6 changer transitions 3/120 dead transitions. [2021-12-16 03:08:36,924 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 120 transitions, 302 flow [2021-12-16 03:08:36,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:08:36,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-16 03:08:36,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 773 transitions. [2021-12-16 03:08:36,928 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8119747899159664 [2021-12-16 03:08:36,928 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 773 transitions. [2021-12-16 03:08:36,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 773 transitions. [2021-12-16 03:08:36,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:36,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 773 transitions. [2021-12-16 03:08:36,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.42857142857143) internal successors, (773), 7 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:36,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 136.0) internal successors, (1088), 8 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:36,938 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 136.0) internal successors, (1088), 8 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:36,938 INFO L186 Difference]: Start difference. First operand has 118 places, 113 transitions, 230 flow. Second operand 7 states and 773 transitions. [2021-12-16 03:08:36,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 120 transitions, 302 flow [2021-12-16 03:08:36,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 120 transitions, 302 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-16 03:08:36,942 INFO L242 Difference]: Finished difference. Result has 122 places, 114 transitions, 256 flow [2021-12-16 03:08:36,943 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=256, PETRI_PLACES=122, PETRI_TRANSITIONS=114} [2021-12-16 03:08:36,944 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 1 predicate places. [2021-12-16 03:08:36,944 INFO L470 AbstractCegarLoop]: Abstraction has has 122 places, 114 transitions, 256 flow [2021-12-16 03:08:36,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 108.66666666666667) internal successors, (652), 6 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:36,945 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:36,945 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:36,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 03:08:36,946 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:08:36,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:36,947 INFO L85 PathProgramCache]: Analyzing trace with hash 853527032, now seen corresponding path program 1 times [2021-12-16 03:08:36,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:36,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919544827] [2021-12-16 03:08:36,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:36,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:37,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:37,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 03:08:37,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:37,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919544827] [2021-12-16 03:08:37,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919544827] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:08:37,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:08:37,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 03:08:37,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981353996] [2021-12-16 03:08:37,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:08:37,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 03:08:37,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:37,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 03:08:37,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 03:08:37,109 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 136 [2021-12-16 03:08:37,109 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 114 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:37,109 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:37,109 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 136 [2021-12-16 03:08:37,110 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:37,154 INFO L129 PetriNetUnfolder]: 13/156 cut-off events. [2021-12-16 03:08:37,155 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2021-12-16 03:08:37,156 INFO L84 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 156 events. 13/156 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 162 event pairs, 1 based on Foata normal form. 1/151 useless extension candidates. Maximal degree in co-relation 211. Up to 23 conditions per place. [2021-12-16 03:08:37,157 INFO L132 encePairwiseOnDemand]: 130/136 looper letters, 12 selfloop transitions, 5 changer transitions 0/117 dead transitions. [2021-12-16 03:08:37,157 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 117 transitions, 301 flow [2021-12-16 03:08:37,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 03:08:37,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-16 03:08:37,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 357 transitions. [2021-12-16 03:08:37,159 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.875 [2021-12-16 03:08:37,159 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 357 transitions. [2021-12-16 03:08:37,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 357 transitions. [2021-12-16 03:08:37,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:37,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 357 transitions. [2021-12-16 03:08:37,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:37,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:37,162 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:37,163 INFO L186 Difference]: Start difference. First operand has 122 places, 114 transitions, 256 flow. Second operand 3 states and 357 transitions. [2021-12-16 03:08:37,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 117 transitions, 301 flow [2021-12-16 03:08:37,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 117 transitions, 291 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-16 03:08:37,166 INFO L242 Difference]: Finished difference. Result has 120 places, 116 transitions, 275 flow [2021-12-16 03:08:37,166 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=275, PETRI_PLACES=120, PETRI_TRANSITIONS=116} [2021-12-16 03:08:37,167 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, -1 predicate places. [2021-12-16 03:08:37,167 INFO L470 AbstractCegarLoop]: Abstraction has has 120 places, 116 transitions, 275 flow [2021-12-16 03:08:37,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:37,168 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:37,168 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:37,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 03:08:37,169 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:08:37,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:37,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1452369754, now seen corresponding path program 2 times [2021-12-16 03:08:37,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:37,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645155151] [2021-12-16 03:08:37,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:37,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:37,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:37,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 03:08:37,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:37,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645155151] [2021-12-16 03:08:37,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645155151] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:08:37,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:08:37,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-16 03:08:37,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726870007] [2021-12-16 03:08:37,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:08:37,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 03:08:37,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:37,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 03:08:37,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-12-16 03:08:37,439 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 136 [2021-12-16 03:08:37,440 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 116 transitions, 275 flow. Second operand has 12 states, 12 states have (on average 90.5) internal successors, (1086), 12 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:37,441 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:37,441 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 136 [2021-12-16 03:08:37,441 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:37,654 INFO L129 PetriNetUnfolder]: 82/335 cut-off events. [2021-12-16 03:08:37,655 INFO L130 PetriNetUnfolder]: For 104/104 co-relation queries the response was YES. [2021-12-16 03:08:37,656 INFO L84 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 335 events. 82/335 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1216 event pairs, 20 based on Foata normal form. 1/312 useless extension candidates. Maximal degree in co-relation 640. Up to 73 conditions per place. [2021-12-16 03:08:37,658 INFO L132 encePairwiseOnDemand]: 121/136 looper letters, 49 selfloop transitions, 13 changer transitions 6/147 dead transitions. [2021-12-16 03:08:37,658 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 147 transitions, 504 flow [2021-12-16 03:08:37,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 03:08:37,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-16 03:08:37,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1213 transitions. [2021-12-16 03:08:37,661 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6860859728506787 [2021-12-16 03:08:37,661 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1213 transitions. [2021-12-16 03:08:37,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1213 transitions. [2021-12-16 03:08:37,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:37,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1213 transitions. [2021-12-16 03:08:37,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 93.3076923076923) internal successors, (1213), 13 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:37,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 136.0) internal successors, (1904), 14 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:37,669 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 136.0) internal successors, (1904), 14 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:37,669 INFO L186 Difference]: Start difference. First operand has 120 places, 116 transitions, 275 flow. Second operand 13 states and 1213 transitions. [2021-12-16 03:08:37,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 147 transitions, 504 flow [2021-12-16 03:08:37,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 147 transitions, 477 flow, removed 11 selfloop flow, removed 2 redundant places. [2021-12-16 03:08:37,674 INFO L242 Difference]: Finished difference. Result has 135 places, 122 transitions, 322 flow [2021-12-16 03:08:37,675 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=322, PETRI_PLACES=135, PETRI_TRANSITIONS=122} [2021-12-16 03:08:37,676 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 14 predicate places. [2021-12-16 03:08:37,676 INFO L470 AbstractCegarLoop]: Abstraction has has 135 places, 122 transitions, 322 flow [2021-12-16 03:08:37,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 90.5) internal successors, (1086), 12 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:37,677 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:37,677 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:37,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 03:08:37,677 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:08:37,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:37,678 INFO L85 PathProgramCache]: Analyzing trace with hash -199541928, now seen corresponding path program 1 times [2021-12-16 03:08:37,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:37,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425717102] [2021-12-16 03:08:37,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:37,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:37,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:37,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 03:08:37,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:37,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425717102] [2021-12-16 03:08:37,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425717102] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:08:37,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:08:37,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 03:08:37,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652691292] [2021-12-16 03:08:37,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:08:37,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 03:08:37,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:37,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 03:08:37,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 03:08:37,815 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 136 [2021-12-16 03:08:37,816 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 122 transitions, 322 flow. Second operand has 4 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:37,816 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:37,816 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 136 [2021-12-16 03:08:37,817 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:37,874 INFO L129 PetriNetUnfolder]: 26/272 cut-off events. [2021-12-16 03:08:37,875 INFO L130 PetriNetUnfolder]: For 80/95 co-relation queries the response was YES. [2021-12-16 03:08:37,876 INFO L84 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 272 events. 26/272 cut-off events. For 80/95 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 822 event pairs, 2 based on Foata normal form. 6/274 useless extension candidates. Maximal degree in co-relation 444. Up to 38 conditions per place. [2021-12-16 03:08:37,878 INFO L132 encePairwiseOnDemand]: 132/136 looper letters, 16 selfloop transitions, 7 changer transitions 3/132 dead transitions. [2021-12-16 03:08:37,878 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 132 transitions, 403 flow [2021-12-16 03:08:37,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 03:08:37,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-16 03:08:37,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 487 transitions. [2021-12-16 03:08:37,880 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8952205882352942 [2021-12-16 03:08:37,880 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 487 transitions. [2021-12-16 03:08:37,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 487 transitions. [2021-12-16 03:08:37,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:37,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 487 transitions. [2021-12-16 03:08:37,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:37,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:37,886 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:37,886 INFO L186 Difference]: Start difference. First operand has 135 places, 122 transitions, 322 flow. Second operand 4 states and 487 transitions. [2021-12-16 03:08:37,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 132 transitions, 403 flow [2021-12-16 03:08:37,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 132 transitions, 387 flow, removed 3 selfloop flow, removed 7 redundant places. [2021-12-16 03:08:37,891 INFO L242 Difference]: Finished difference. Result has 130 places, 123 transitions, 340 flow [2021-12-16 03:08:37,891 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=340, PETRI_PLACES=130, PETRI_TRANSITIONS=123} [2021-12-16 03:08:37,894 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 9 predicate places. [2021-12-16 03:08:37,894 INFO L470 AbstractCegarLoop]: Abstraction has has 130 places, 123 transitions, 340 flow [2021-12-16 03:08:37,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:37,901 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:37,901 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:37,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 03:08:37,902 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:08:37,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:37,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1483873607, now seen corresponding path program 1 times [2021-12-16 03:08:37,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:37,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753797930] [2021-12-16 03:08:37,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:37,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:37,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:38,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:38,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:38,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753797930] [2021-12-16 03:08:38,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753797930] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:08:38,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377417745] [2021-12-16 03:08:38,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:38,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:08:38,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:08:38,015 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:08:38,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 03:08:38,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:38,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 03:08:38,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:08:38,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:38,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:08:38,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:38,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377417745] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:08:38,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:08:38,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-12-16 03:08:38,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091398396] [2021-12-16 03:08:38,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:08:38,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 03:08:38,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:38,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 03:08:38,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-12-16 03:08:38,928 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 136 [2021-12-16 03:08:38,930 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 123 transitions, 340 flow. Second operand has 19 states, 19 states have (on average 105.52631578947368) internal successors, (2005), 19 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:38,930 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:38,930 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 136 [2021-12-16 03:08:38,930 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:39,179 INFO L129 PetriNetUnfolder]: 26/315 cut-off events. [2021-12-16 03:08:39,179 INFO L130 PetriNetUnfolder]: For 210/251 co-relation queries the response was YES. [2021-12-16 03:08:39,181 INFO L84 FinitePrefix]: Finished finitePrefix Result has 581 conditions, 315 events. 26/315 cut-off events. For 210/251 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 924 event pairs, 6 based on Foata normal form. 7/318 useless extension candidates. Maximal degree in co-relation 570. Up to 54 conditions per place. [2021-12-16 03:08:39,182 INFO L132 encePairwiseOnDemand]: 124/136 looper letters, 28 selfloop transitions, 11 changer transitions 6/137 dead transitions. [2021-12-16 03:08:39,182 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 137 transitions, 479 flow [2021-12-16 03:08:39,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 03:08:39,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-16 03:08:39,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1277 transitions. [2021-12-16 03:08:39,186 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7824754901960784 [2021-12-16 03:08:39,186 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1277 transitions. [2021-12-16 03:08:39,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1277 transitions. [2021-12-16 03:08:39,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:39,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1277 transitions. [2021-12-16 03:08:39,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 106.41666666666667) internal successors, (1277), 12 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:39,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 136.0) internal successors, (1768), 13 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:39,193 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 136.0) internal successors, (1768), 13 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:39,193 INFO L186 Difference]: Start difference. First operand has 130 places, 123 transitions, 340 flow. Second operand 12 states and 1277 transitions. [2021-12-16 03:08:39,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 137 transitions, 479 flow [2021-12-16 03:08:39,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 137 transitions, 463 flow, removed 8 selfloop flow, removed 1 redundant places. [2021-12-16 03:08:39,199 INFO L242 Difference]: Finished difference. Result has 144 places, 127 transitions, 389 flow [2021-12-16 03:08:39,200 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=389, PETRI_PLACES=144, PETRI_TRANSITIONS=127} [2021-12-16 03:08:39,202 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 23 predicate places. [2021-12-16 03:08:39,202 INFO L470 AbstractCegarLoop]: Abstraction has has 144 places, 127 transitions, 389 flow [2021-12-16 03:08:39,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 105.52631578947368) internal successors, (2005), 19 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:39,203 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:39,203 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:39,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 03:08:39,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-16 03:08:39,420 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:08:39,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:39,420 INFO L85 PathProgramCache]: Analyzing trace with hash -129661522, now seen corresponding path program 2 times [2021-12-16 03:08:39,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:39,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186814689] [2021-12-16 03:08:39,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:39,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:39,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:40,340 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:40,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:40,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186814689] [2021-12-16 03:08:40,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186814689] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:08:40,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796801400] [2021-12-16 03:08:40,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 03:08:40,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:08:40,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:08:40,344 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:08:40,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 03:08:40,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 03:08:40,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:08:40,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-16 03:08:40,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:08:41,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 03:08:41,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 03:08:41,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2021-12-16 03:08:41,810 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:41,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:08:42,066 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-16 03:08:42,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2021-12-16 03:08:43,197 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:43,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796801400] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:08:43,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:08:43,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 19, 14] total 53 [2021-12-16 03:08:43,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538966366] [2021-12-16 03:08:43,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:08:43,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-16 03:08:43,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:43,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-16 03:08:43,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=2486, Unknown=0, NotChecked=0, Total=2756 [2021-12-16 03:08:43,205 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 136 [2021-12-16 03:08:43,208 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 127 transitions, 389 flow. Second operand has 53 states, 53 states have (on average 59.54716981132076) internal successors, (3156), 53 states have internal predecessors, (3156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:43,208 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:43,208 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 136 [2021-12-16 03:08:43,208 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:45,401 INFO L129 PetriNetUnfolder]: 808/1854 cut-off events. [2021-12-16 03:08:45,402 INFO L130 PetriNetUnfolder]: For 1465/1465 co-relation queries the response was YES. [2021-12-16 03:08:45,407 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4680 conditions, 1854 events. 808/1854 cut-off events. For 1465/1465 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11790 event pairs, 55 based on Foata normal form. 0/1785 useless extension candidates. Maximal degree in co-relation 4663. Up to 790 conditions per place. [2021-12-16 03:08:45,415 INFO L132 encePairwiseOnDemand]: 105/136 looper letters, 147 selfloop transitions, 123 changer transitions 0/316 dead transitions. [2021-12-16 03:08:45,416 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 316 transitions, 1617 flow [2021-12-16 03:08:45,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-16 03:08:45,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-12-16 03:08:45,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2599 transitions. [2021-12-16 03:08:45,423 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.45500700280112044 [2021-12-16 03:08:45,423 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2599 transitions. [2021-12-16 03:08:45,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2599 transitions. [2021-12-16 03:08:45,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:45,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2599 transitions. [2021-12-16 03:08:45,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 61.88095238095238) internal successors, (2599), 42 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:45,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 136.0) internal successors, (5848), 43 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:45,439 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 136.0) internal successors, (5848), 43 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:45,440 INFO L186 Difference]: Start difference. First operand has 144 places, 127 transitions, 389 flow. Second operand 42 states and 2599 transitions. [2021-12-16 03:08:45,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 316 transitions, 1617 flow [2021-12-16 03:08:45,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 316 transitions, 1572 flow, removed 18 selfloop flow, removed 6 redundant places. [2021-12-16 03:08:45,448 INFO L242 Difference]: Finished difference. Result has 204 places, 244 transitions, 1403 flow [2021-12-16 03:08:45,449 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1403, PETRI_PLACES=204, PETRI_TRANSITIONS=244} [2021-12-16 03:08:45,449 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 83 predicate places. [2021-12-16 03:08:45,450 INFO L470 AbstractCegarLoop]: Abstraction has has 204 places, 244 transitions, 1403 flow [2021-12-16 03:08:45,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 59.54716981132076) internal successors, (3156), 53 states have internal predecessors, (3156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:45,451 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:45,452 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:45,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 03:08:45,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-16 03:08:45,666 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:08:45,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:45,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1476505526, now seen corresponding path program 3 times [2021-12-16 03:08:45,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:45,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784129730] [2021-12-16 03:08:45,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:45,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:45,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:46,442 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:46,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:46,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784129730] [2021-12-16 03:08:46,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784129730] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:08:46,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745619464] [2021-12-16 03:08:46,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 03:08:46,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:08:46,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:08:46,444 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:08:46,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 03:08:46,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-16 03:08:46,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:08:46,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 03:08:46,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:08:46,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-12-16 03:08:46,857 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 03:08:46,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:08:46,937 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-16 03:08:46,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2021-12-16 03:08:47,089 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 03:08:47,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745619464] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:08:47,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:08:47,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 5, 5] total 29 [2021-12-16 03:08:47,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838058790] [2021-12-16 03:08:47,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:08:47,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-16 03:08:47,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:47,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-16 03:08:47,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-12-16 03:08:47,094 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 136 [2021-12-16 03:08:47,095 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 244 transitions, 1403 flow. Second operand has 29 states, 29 states have (on average 60.758620689655174) internal successors, (1762), 29 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:47,095 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:47,096 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 136 [2021-12-16 03:08:47,096 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:49,808 INFO L129 PetriNetUnfolder]: 1529/3384 cut-off events. [2021-12-16 03:08:49,809 INFO L130 PetriNetUnfolder]: For 33055/33129 co-relation queries the response was YES. [2021-12-16 03:08:49,868 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16058 conditions, 3384 events. 1529/3384 cut-off events. For 33055/33129 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25487 event pairs, 95 based on Foata normal form. 82/3406 useless extension candidates. Maximal degree in co-relation 16017. Up to 737 conditions per place. [2021-12-16 03:08:49,895 INFO L132 encePairwiseOnDemand]: 110/136 looper letters, 353 selfloop transitions, 129 changer transitions 0/528 dead transitions. [2021-12-16 03:08:49,895 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 528 transitions, 4800 flow [2021-12-16 03:08:49,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-16 03:08:49,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-12-16 03:08:49,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2452 transitions. [2021-12-16 03:08:49,901 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4622926093514329 [2021-12-16 03:08:49,902 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2452 transitions. [2021-12-16 03:08:49,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2452 transitions. [2021-12-16 03:08:49,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:49,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2452 transitions. [2021-12-16 03:08:49,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 62.87179487179487) internal successors, (2452), 39 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:49,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 136.0) internal successors, (5440), 40 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:49,916 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 136.0) internal successors, (5440), 40 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:49,916 INFO L186 Difference]: Start difference. First operand has 204 places, 244 transitions, 1403 flow. Second operand 39 states and 2452 transitions. [2021-12-16 03:08:49,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 528 transitions, 4800 flow [2021-12-16 03:08:49,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 528 transitions, 4541 flow, removed 115 selfloop flow, removed 12 redundant places. [2021-12-16 03:08:49,987 INFO L242 Difference]: Finished difference. Result has 242 places, 316 transitions, 2254 flow [2021-12-16 03:08:49,988 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=1262, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2254, PETRI_PLACES=242, PETRI_TRANSITIONS=316} [2021-12-16 03:08:49,988 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 121 predicate places. [2021-12-16 03:08:49,989 INFO L470 AbstractCegarLoop]: Abstraction has has 242 places, 316 transitions, 2254 flow [2021-12-16 03:08:49,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 60.758620689655174) internal successors, (1762), 29 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:49,990 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:49,990 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:50,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 03:08:50,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:08:50,207 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:08:50,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:50,208 INFO L85 PathProgramCache]: Analyzing trace with hash -116110872, now seen corresponding path program 4 times [2021-12-16 03:08:50,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:50,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604840629] [2021-12-16 03:08:50,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:50,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:50,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:51,477 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:51,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:51,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604840629] [2021-12-16 03:08:51,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604840629] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:08:51,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460065235] [2021-12-16 03:08:51,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 03:08:51,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:08:51,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:08:51,480 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:08:51,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 03:08:51,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 03:08:51,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:08:51,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-16 03:08:51,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:08:52,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 03:08:52,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-16 03:08:52,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-12-16 03:08:52,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:52,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:08:53,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 03:08:53,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2021-12-16 03:08:53,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-12-16 03:08:54,652 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:54,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460065235] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:08:54,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:08:54,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 21, 21] total 65 [2021-12-16 03:08:54,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868110116] [2021-12-16 03:08:54,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:08:54,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-16 03:08:54,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:54,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-16 03:08:54,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=3867, Unknown=1, NotChecked=0, Total=4160 [2021-12-16 03:08:54,658 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 136 [2021-12-16 03:08:54,672 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 316 transitions, 2254 flow. Second operand has 65 states, 65 states have (on average 50.07692307692308) internal successors, (3255), 65 states have internal predecessors, (3255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:54,672 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:54,673 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 136 [2021-12-16 03:08:54,673 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:04,691 INFO L129 PetriNetUnfolder]: 4161/8766 cut-off events. [2021-12-16 03:09:04,692 INFO L130 PetriNetUnfolder]: For 115189/115256 co-relation queries the response was YES. [2021-12-16 03:09:04,768 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48540 conditions, 8766 events. 4161/8766 cut-off events. For 115189/115256 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 76215 event pairs, 213 based on Foata normal form. 219/8910 useless extension candidates. Maximal degree in co-relation 48487. Up to 2283 conditions per place. [2021-12-16 03:09:04,829 INFO L132 encePairwiseOnDemand]: 106/136 looper letters, 489 selfloop transitions, 416 changer transitions 0/945 dead transitions. [2021-12-16 03:09:04,829 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 945 transitions, 10213 flow [2021-12-16 03:09:04,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-16 03:09:04,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-12-16 03:09:04,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 3592 transitions. [2021-12-16 03:09:04,839 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3942054433713784 [2021-12-16 03:09:04,839 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 3592 transitions. [2021-12-16 03:09:04,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 3592 transitions. [2021-12-16 03:09:04,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:04,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 3592 transitions. [2021-12-16 03:09:04,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 53.61194029850746) internal successors, (3592), 67 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:04,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 136.0) internal successors, (9248), 68 states have internal predecessors, (9248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:04,863 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 136.0) internal successors, (9248), 68 states have internal predecessors, (9248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:04,863 INFO L186 Difference]: Start difference. First operand has 242 places, 316 transitions, 2254 flow. Second operand 67 states and 3592 transitions. [2021-12-16 03:09:04,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 945 transitions, 10213 flow [2021-12-16 03:09:05,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 945 transitions, 10072 flow, removed 49 selfloop flow, removed 20 redundant places. [2021-12-16 03:09:05,090 INFO L242 Difference]: Finished difference. Result has 312 places, 632 transitions, 7177 flow [2021-12-16 03:09:05,090 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=2163, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=7177, PETRI_PLACES=312, PETRI_TRANSITIONS=632} [2021-12-16 03:09:05,091 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 191 predicate places. [2021-12-16 03:09:05,092 INFO L470 AbstractCegarLoop]: Abstraction has has 312 places, 632 transitions, 7177 flow [2021-12-16 03:09:05,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 50.07692307692308) internal successors, (3255), 65 states have internal predecessors, (3255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:05,099 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:05,099 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:09:05,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 03:09:05,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:09:05,315 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:05,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:05,316 INFO L85 PathProgramCache]: Analyzing trace with hash -982883574, now seen corresponding path program 1 times [2021-12-16 03:09:05,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:05,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953256045] [2021-12-16 03:09:05,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:05,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:05,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:06,536 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:06,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:06,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953256045] [2021-12-16 03:09:06,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953256045] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:09:06,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978403337] [2021-12-16 03:09:06,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:06,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:09:06,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:09:06,538 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:09:06,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 03:09:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:06,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-16 03:09:06,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:09:07,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-12-16 03:09:08,107 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:08,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:09:08,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 03:09:08,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 35 [2021-12-16 03:09:09,882 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:09,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978403337] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:09:09,882 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:09:09,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 25, 25] total 70 [2021-12-16 03:09:09,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584992019] [2021-12-16 03:09:09,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:09:09,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-16 03:09:09,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:09,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-16 03:09:09,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=529, Invalid=4301, Unknown=0, NotChecked=0, Total=4830 [2021-12-16 03:09:09,887 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 136 [2021-12-16 03:09:09,891 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 632 transitions, 7177 flow. Second operand has 70 states, 70 states have (on average 57.75714285714286) internal successors, (4043), 70 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:09,891 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:09,891 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 136 [2021-12-16 03:09:09,892 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:24,464 INFO L129 PetriNetUnfolder]: 8084/16063 cut-off events. [2021-12-16 03:09:24,464 INFO L130 PetriNetUnfolder]: For 340355/340487 co-relation queries the response was YES. [2021-12-16 03:09:24,589 INFO L84 FinitePrefix]: Finished finitePrefix Result has 111676 conditions, 16063 events. 8084/16063 cut-off events. For 340355/340487 co-relation queries the response was YES. Maximal size of possible extension queue 806. Compared 144343 event pairs, 354 based on Foata normal form. 54/16029 useless extension candidates. Maximal degree in co-relation 111599. Up to 4153 conditions per place. [2021-12-16 03:09:24,828 INFO L132 encePairwiseOnDemand]: 100/136 looper letters, 770 selfloop transitions, 1098 changer transitions 70/1983 dead transitions. [2021-12-16 03:09:24,828 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 1983 transitions, 27808 flow [2021-12-16 03:09:24,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-12-16 03:09:24,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2021-12-16 03:09:24,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 7129 transitions. [2021-12-16 03:09:24,851 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.44802664655605834 [2021-12-16 03:09:24,852 INFO L72 ComplementDD]: Start complementDD. Operand 117 states and 7129 transitions. [2021-12-16 03:09:24,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 117 states and 7129 transitions. [2021-12-16 03:09:24,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:24,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 117 states and 7129 transitions. [2021-12-16 03:09:24,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 118 states, 117 states have (on average 60.93162393162393) internal successors, (7129), 117 states have internal predecessors, (7129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:24,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 118 states, 118 states have (on average 136.0) internal successors, (16048), 118 states have internal predecessors, (16048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:24,906 INFO L81 ComplementDD]: Finished complementDD. Result has 118 states, 118 states have (on average 136.0) internal successors, (16048), 118 states have internal predecessors, (16048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:24,907 INFO L186 Difference]: Start difference. First operand has 312 places, 632 transitions, 7177 flow. Second operand 117 states and 7129 transitions. [2021-12-16 03:09:24,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 1983 transitions, 27808 flow [2021-12-16 03:09:25,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 1983 transitions, 25271 flow, removed 1200 selfloop flow, removed 33 redundant places. [2021-12-16 03:09:25,989 INFO L242 Difference]: Finished difference. Result has 444 places, 1392 transitions, 19679 flow [2021-12-16 03:09:25,990 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=6318, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=414, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=117, PETRI_FLOW=19679, PETRI_PLACES=444, PETRI_TRANSITIONS=1392} [2021-12-16 03:09:25,991 INFO L334 CegarLoopForPetriNet]: 121 programPoint places, 323 predicate places. [2021-12-16 03:09:25,991 INFO L470 AbstractCegarLoop]: Abstraction has has 444 places, 1392 transitions, 19679 flow [2021-12-16 03:09:25,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 57.75714285714286) internal successors, (4043), 70 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:09:25,993 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:25,993 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:09:26,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-16 03:09:26,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-16 03:09:26,217 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:26,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:26,217 INFO L85 PathProgramCache]: Analyzing trace with hash 789112724, now seen corresponding path program 2 times [2021-12-16 03:09:26,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:26,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035061220] [2021-12-16 03:09:26,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:26,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:27,188 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:09:27,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:27,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035061220] [2021-12-16 03:09:27,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035061220] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:09:27,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589017963] [2021-12-16 03:09:27,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 03:09:27,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:09:27,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:09:27,190 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:09:27,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 03:09:27,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 03:09:27,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:09:27,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-16 03:09:27,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:09:27,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 03:09:28,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-16 03:09:28,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5