./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/test-context1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/test-context1.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 a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:50:00,182 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:50:00,184 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:50:00,230 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:50:00,231 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:50:00,234 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:50:00,235 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:50:00,238 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:50:00,240 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:50:00,244 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:50:00,244 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:50:00,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:50:00,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:50:00,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:50:00,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:50:00,252 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:50:00,253 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:50:00,254 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:50:00,256 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:50:00,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:50:00,263 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:50:00,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:50:00,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:50:00,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:50:00,271 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:50:00,272 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:50:00,272 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:50:00,274 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:50:00,274 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:50:00,275 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:50:00,275 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:50:00,276 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:50:00,277 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:50:00,278 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:50:00,279 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:50:00,280 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:50:00,280 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:50:00,280 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:50:00,281 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:50:00,281 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:50:00,283 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:50:00,284 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:50:00,316 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:50:00,316 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:50:00,317 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:50:00,317 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:50:00,318 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:50:00,318 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:50:00,319 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:50:00,319 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:50:00,319 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:50:00,319 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:50:00,320 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:50:00,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:50:00,320 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:50:00,321 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:50:00,321 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:50:00,321 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:50:00,321 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:50:00,321 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:50:00,321 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:50:00,322 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:50:00,322 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:50:00,322 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:50:00,322 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:50:00,322 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:50:00,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:50:00,323 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:50:00,323 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:50:00,324 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:50:00,324 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:50:00,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:50:00,325 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:50:00,325 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:50:00,325 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:50:00,325 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:50:00,326 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce [2021-12-22 13:50:00,567 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:50:00,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:50:00,594 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:50:00,595 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:50:00,596 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:50:00,597 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test-context1.wvr.c [2021-12-22 13:50:00,659 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dfb79dc5/7552fa7a58414d2b9d585bade6616824/FLAGa7d387d15 [2021-12-22 13:50:01,039 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:50:01,040 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-context1.wvr.c [2021-12-22 13:50:01,047 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dfb79dc5/7552fa7a58414d2b9d585bade6616824/FLAGa7d387d15 [2021-12-22 13:50:01,453 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dfb79dc5/7552fa7a58414d2b9d585bade6616824 [2021-12-22 13:50:01,455 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:50:01,456 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:50:01,458 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:50:01,459 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:50:01,462 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:50:01,462 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:50:01" (1/1) ... [2021-12-22 13:50:01,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51743bdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:01, skipping insertion in model container [2021-12-22 13:50:01,464 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:50:01" (1/1) ... [2021-12-22 13:50:01,473 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:50:01,487 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:50:01,664 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/test-context1.wvr.c[2433,2446] [2021-12-22 13:50:01,672 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:50:01,688 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:50:01,710 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/test-context1.wvr.c[2433,2446] [2021-12-22 13:50:01,713 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:50:01,725 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:50:01,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:01 WrapperNode [2021-12-22 13:50:01,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:50:01,726 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:50:01,726 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:50:01,726 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:50:01,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:01" (1/1) ... [2021-12-22 13:50:01,742 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:01" (1/1) ... [2021-12-22 13:50:01,772 INFO L137 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 131 [2021-12-22 13:50:01,776 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:50:01,777 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:50:01,777 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:50:01,777 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:50:01,785 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:01" (1/1) ... [2021-12-22 13:50:01,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:01" (1/1) ... [2021-12-22 13:50:01,798 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:01" (1/1) ... [2021-12-22 13:50:01,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:01" (1/1) ... [2021-12-22 13:50:01,819 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:01" (1/1) ... [2021-12-22 13:50:01,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:01" (1/1) ... [2021-12-22 13:50:01,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:01" (1/1) ... [2021-12-22 13:50:01,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:50:01,831 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:50:01,831 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:50:01,832 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:50:01,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:01" (1/1) ... [2021-12-22 13:50:01,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:50:01,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:50:01,868 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 13:50:01,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 13:50:01,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:50:01,908 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-22 13:50:01,908 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-22 13:50:01,908 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-22 13:50:01,909 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-22 13:50:01,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:50:01,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 13:50:01,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 13:50:01,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-22 13:50:01,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-22 13:50:01,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 13:50:01,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:50:01,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:50:01,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 13:50:01,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 13:50:01,911 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-22 13:50:01,996 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:50:01,997 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:50:02,175 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:50:02,332 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:50:02,333 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-22 13:50:02,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:50:02 BoogieIcfgContainer [2021-12-22 13:50:02,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:50:02,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:50:02,337 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:50:02,340 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:50:02,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:50:01" (1/3) ... [2021-12-22 13:50:02,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c146eb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:50:02, skipping insertion in model container [2021-12-22 13:50:02,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:01" (2/3) ... [2021-12-22 13:50:02,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c146eb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:50:02, skipping insertion in model container [2021-12-22 13:50:02,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:50:02" (3/3) ... [2021-12-22 13:50:02,343 INFO L111 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2021-12-22 13:50:02,347 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-22 13:50:02,348 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:50:02,348 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 13:50:02,348 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-22 13:50:02,378 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,379 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,379 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,379 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,380 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,380 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,380 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,381 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,381 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,381 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,381 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,381 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,382 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,382 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,382 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,382 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,383 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,383 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,383 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,383 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,384 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,385 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,385 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,385 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,385 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,386 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,386 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,386 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,386 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,386 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,387 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,387 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,387 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,387 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,387 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,388 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,388 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,388 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,389 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,389 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,389 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,389 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,392 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,393 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,393 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,393 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,393 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,394 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,394 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,395 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,395 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,395 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,395 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,395 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,396 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,396 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,396 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:02,399 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-22 13:50:02,441 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:50:02,447 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 13:50:02,448 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-22 13:50:02,458 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 114 places, 116 transitions, 248 flow [2021-12-22 13:50:02,516 INFO L129 PetriNetUnfolder]: 9/114 cut-off events. [2021-12-22 13:50:02,516 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-22 13:50:02,519 INFO L84 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 114 events. 9/114 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2021-12-22 13:50:02,519 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 116 transitions, 248 flow [2021-12-22 13:50:02,525 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 105 transitions, 222 flow [2021-12-22 13:50:02,568 INFO L129 PetriNetUnfolder]: 9/104 cut-off events. [2021-12-22 13:50:02,569 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-22 13:50:02,569 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:02,570 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:50:02,571 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:02,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:02,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1304387571, now seen corresponding path program 1 times [2021-12-22 13:50:02,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:02,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277135833] [2021-12-22 13:50:02,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:02,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:02,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:02,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:02,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:02,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277135833] [2021-12-22 13:50:02,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277135833] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:02,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:02,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 13:50:02,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019716116] [2021-12-22 13:50:02,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:02,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 13:50:02,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:02,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 13:50:02,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 13:50:02,865 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 116 [2021-12-22 13:50:02,869 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 105 transitions, 222 flow. Second operand has 2 states, 2 states have (on average 106.5) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:02,870 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:02,870 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 116 [2021-12-22 13:50:02,871 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:02,919 INFO L129 PetriNetUnfolder]: 5/101 cut-off events. [2021-12-22 13:50:02,919 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-12-22 13:50:02,920 INFO L84 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 101 events. 5/101 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 8/103 useless extension candidates. Maximal degree in co-relation 79. Up to 9 conditions per place. [2021-12-22 13:50:02,921 INFO L132 encePairwiseOnDemand]: 110/116 looper letters, 6 selfloop transitions, 0 changer transitions 3/99 dead transitions. [2021-12-22 13:50:02,922 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 99 transitions, 222 flow [2021-12-22 13:50:02,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 13:50:02,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-22 13:50:02,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 218 transitions. [2021-12-22 13:50:02,934 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9396551724137931 [2021-12-22 13:50:02,936 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 218 transitions. [2021-12-22 13:50:02,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 218 transitions. [2021-12-22 13:50:02,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:02,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 218 transitions. [2021-12-22 13:50:02,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 109.0) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:02,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:02,959 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:02,961 INFO L186 Difference]: Start difference. First operand has 103 places, 105 transitions, 222 flow. Second operand 2 states and 218 transitions. [2021-12-22 13:50:02,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 99 transitions, 222 flow [2021-12-22 13:50:02,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 99 transitions, 214 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-22 13:50:02,970 INFO L242 Difference]: Finished difference. Result has 100 places, 96 transitions, 196 flow [2021-12-22 13:50:02,973 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=196, PETRI_PLACES=100, PETRI_TRANSITIONS=96} [2021-12-22 13:50:02,979 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, -3 predicate places. [2021-12-22 13:50:02,979 INFO L470 AbstractCegarLoop]: Abstraction has has 100 places, 96 transitions, 196 flow [2021-12-22 13:50:02,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 106.5) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:02,980 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:02,980 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] [2021-12-22 13:50:02,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:50:02,981 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:02,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:02,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1861027578, now seen corresponding path program 1 times [2021-12-22 13:50:02,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:02,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875238182] [2021-12-22 13:50:02,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:02,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:03,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:03,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:03,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:03,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875238182] [2021-12-22 13:50:03,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875238182] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:03,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:03,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:50:03,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143350488] [2021-12-22 13:50:03,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:03,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:50:03,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:03,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:50:03,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:50:03,193 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2021-12-22 13:50:03,194 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 96 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 89.6) internal successors, (448), 5 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:03,194 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:03,194 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2021-12-22 13:50:03,194 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:03,281 INFO L129 PetriNetUnfolder]: 7/120 cut-off events. [2021-12-22 13:50:03,281 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-12-22 13:50:03,283 INFO L84 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 120 events. 7/120 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 96 event pairs, 0 based on Foata normal form. 1/116 useless extension candidates. Maximal degree in co-relation 152. Up to 15 conditions per place. [2021-12-22 13:50:03,285 INFO L132 encePairwiseOnDemand]: 111/116 looper letters, 21 selfloop transitions, 2 changer transitions 4/103 dead transitions. [2021-12-22 13:50:03,285 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 103 transitions, 266 flow [2021-12-22 13:50:03,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:50:03,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-22 13:50:03,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 458 transitions. [2021-12-22 13:50:03,293 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7896551724137931 [2021-12-22 13:50:03,294 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 458 transitions. [2021-12-22 13:50:03,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 458 transitions. [2021-12-22 13:50:03,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:03,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 458 transitions. [2021-12-22 13:50:03,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 91.6) internal successors, (458), 5 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:03,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:03,301 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:03,301 INFO L186 Difference]: Start difference. First operand has 100 places, 96 transitions, 196 flow. Second operand 5 states and 458 transitions. [2021-12-22 13:50:03,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 103 transitions, 266 flow [2021-12-22 13:50:03,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 103 transitions, 266 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-22 13:50:03,306 INFO L242 Difference]: Finished difference. Result has 104 places, 97 transitions, 212 flow [2021-12-22 13:50:03,307 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=104, PETRI_TRANSITIONS=97} [2021-12-22 13:50:03,308 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 1 predicate places. [2021-12-22 13:50:03,308 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 97 transitions, 212 flow [2021-12-22 13:50:03,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.6) internal successors, (448), 5 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:03,309 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:03,309 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:50:03,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:50:03,310 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:03,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:03,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1965846470, now seen corresponding path program 1 times [2021-12-22 13:50:03,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:03,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323153411] [2021-12-22 13:50:03,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:03,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:03,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:03,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:03,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:03,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323153411] [2021-12-22 13:50:03,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323153411] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:03,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:03,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:50:03,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702927658] [2021-12-22 13:50:03,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:03,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:50:03,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:03,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:50:03,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:50:03,431 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2021-12-22 13:50:03,431 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 97 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:03,431 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:03,432 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2021-12-22 13:50:03,432 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:03,481 INFO L129 PetriNetUnfolder]: 8/138 cut-off events. [2021-12-22 13:50:03,481 INFO L130 PetriNetUnfolder]: For 13/14 co-relation queries the response was YES. [2021-12-22 13:50:03,482 INFO L84 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 138 events. 8/138 cut-off events. For 13/14 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 185 event pairs, 1 based on Foata normal form. 3/133 useless extension candidates. Maximal degree in co-relation 170. Up to 15 conditions per place. [2021-12-22 13:50:03,483 INFO L132 encePairwiseOnDemand]: 113/116 looper letters, 8 selfloop transitions, 2 changer transitions 2/101 dead transitions. [2021-12-22 13:50:03,483 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 101 transitions, 247 flow [2021-12-22 13:50:03,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:50:03,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-22 13:50:03,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 318 transitions. [2021-12-22 13:50:03,488 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9137931034482759 [2021-12-22 13:50:03,488 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 318 transitions. [2021-12-22 13:50:03,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 318 transitions. [2021-12-22 13:50:03,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:03,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 318 transitions. [2021-12-22 13:50:03,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:03,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:03,491 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:03,492 INFO L186 Difference]: Start difference. First operand has 104 places, 97 transitions, 212 flow. Second operand 3 states and 318 transitions. [2021-12-22 13:50:03,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 101 transitions, 247 flow [2021-12-22 13:50:03,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 101 transitions, 241 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-12-22 13:50:03,495 INFO L242 Difference]: Finished difference. Result has 102 places, 98 transitions, 218 flow [2021-12-22 13:50:03,495 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=102, PETRI_TRANSITIONS=98} [2021-12-22 13:50:03,496 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, -1 predicate places. [2021-12-22 13:50:03,496 INFO L470 AbstractCegarLoop]: Abstraction has has 102 places, 98 transitions, 218 flow [2021-12-22 13:50:03,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:03,497 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:03,497 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] [2021-12-22 13:50:03,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:50:03,497 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:03,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:03,498 INFO L85 PathProgramCache]: Analyzing trace with hash 983157472, now seen corresponding path program 1 times [2021-12-22 13:50:03,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:03,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764003463] [2021-12-22 13:50:03,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:03,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:03,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:50:03,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:03,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764003463] [2021-12-22 13:50:03,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764003463] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:03,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:03,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:50:03,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346878739] [2021-12-22 13:50:03,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:03,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:50:03,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:03,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:50:03,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:50:03,686 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 116 [2021-12-22 13:50:03,687 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 98 transitions, 218 flow. Second operand has 8 states, 8 states have (on average 89.25) internal successors, (714), 8 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:03,687 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:03,687 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 116 [2021-12-22 13:50:03,688 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:03,808 INFO L129 PetriNetUnfolder]: 8/184 cut-off events. [2021-12-22 13:50:03,808 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2021-12-22 13:50:03,809 INFO L84 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 184 events. 8/184 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 375 event pairs, 0 based on Foata normal form. 2/176 useless extension candidates. Maximal degree in co-relation 248. Up to 14 conditions per place. [2021-12-22 13:50:03,810 INFO L132 encePairwiseOnDemand]: 105/116 looper letters, 21 selfloop transitions, 10 changer transitions 8/113 dead transitions. [2021-12-22 13:50:03,810 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 113 transitions, 337 flow [2021-12-22 13:50:03,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:50:03,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:50:03,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 823 transitions. [2021-12-22 13:50:03,812 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7883141762452107 [2021-12-22 13:50:03,812 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 823 transitions. [2021-12-22 13:50:03,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 823 transitions. [2021-12-22 13:50:03,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:03,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 823 transitions. [2021-12-22 13:50:03,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 91.44444444444444) internal successors, (823), 9 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:03,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 116.0) internal successors, (1160), 10 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:03,817 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 116.0) internal successors, (1160), 10 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:03,818 INFO L186 Difference]: Start difference. First operand has 102 places, 98 transitions, 218 flow. Second operand 9 states and 823 transitions. [2021-12-22 13:50:03,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 113 transitions, 337 flow [2021-12-22 13:50:03,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 113 transitions, 335 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-22 13:50:03,821 INFO L242 Difference]: Finished difference. Result has 110 places, 99 transitions, 244 flow [2021-12-22 13:50:03,821 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=244, PETRI_PLACES=110, PETRI_TRANSITIONS=99} [2021-12-22 13:50:03,822 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 7 predicate places. [2021-12-22 13:50:03,822 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 99 transitions, 244 flow [2021-12-22 13:50:03,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 89.25) internal successors, (714), 8 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:03,822 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:03,823 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] [2021-12-22 13:50:03,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:50:03,823 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:03,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:03,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1344338713, now seen corresponding path program 1 times [2021-12-22 13:50:03,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:03,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496053015] [2021-12-22 13:50:03,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:03,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:03,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:04,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:50:04,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:04,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496053015] [2021-12-22 13:50:04,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496053015] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:50:04,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3734925] [2021-12-22 13:50:04,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:04,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:04,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:50:04,124 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) [2021-12-22 13:50:04,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 13:50:04,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:04,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-22 13:50:04,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:50:04,859 INFO L387 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 15 treesize of output 7 [2021-12-22 13:50:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:50:04,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:50:04,987 INFO L353 Elim1Store]: treesize reduction 14, result has 26.3 percent of original size [2021-12-22 13:50:04,988 INFO L387 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 27 treesize of output 13 [2021-12-22 13:50:05,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:50:05,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3734925] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:50:05,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:50:05,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 7] total 15 [2021-12-22 13:50:05,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838684614] [2021-12-22 13:50:05,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:50:05,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 13:50:05,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:05,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 13:50:05,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-12-22 13:50:05,149 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 116 [2021-12-22 13:50:05,152 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 99 transitions, 244 flow. Second operand has 15 states, 15 states have (on average 70.66666666666667) internal successors, (1060), 15 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:05,152 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:05,152 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 116 [2021-12-22 13:50:05,152 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:05,458 INFO L129 PetriNetUnfolder]: 28/243 cut-off events. [2021-12-22 13:50:05,458 INFO L130 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2021-12-22 13:50:05,461 INFO L84 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 243 events. 28/243 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 701 event pairs, 0 based on Foata normal form. 1/229 useless extension candidates. Maximal degree in co-relation 405. Up to 27 conditions per place. [2021-12-22 13:50:05,463 INFO L132 encePairwiseOnDemand]: 100/116 looper letters, 45 selfloop transitions, 15 changer transitions 9/126 dead transitions. [2021-12-22 13:50:05,463 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 126 transitions, 462 flow [2021-12-22 13:50:05,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 13:50:05,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-22 13:50:05,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1192 transitions. [2021-12-22 13:50:05,467 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6044624746450304 [2021-12-22 13:50:05,467 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1192 transitions. [2021-12-22 13:50:05,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1192 transitions. [2021-12-22 13:50:05,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:05,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1192 transitions. [2021-12-22 13:50:05,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 70.11764705882354) internal successors, (1192), 17 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:05,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 116.0) internal successors, (2088), 18 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:05,476 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 116.0) internal successors, (2088), 18 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:05,477 INFO L186 Difference]: Start difference. First operand has 110 places, 99 transitions, 244 flow. Second operand 17 states and 1192 transitions. [2021-12-22 13:50:05,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 126 transitions, 462 flow [2021-12-22 13:50:05,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 126 transitions, 449 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-12-22 13:50:05,480 INFO L242 Difference]: Finished difference. Result has 124 places, 102 transitions, 290 flow [2021-12-22 13:50:05,481 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=290, PETRI_PLACES=124, PETRI_TRANSITIONS=102} [2021-12-22 13:50:05,481 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 21 predicate places. [2021-12-22 13:50:05,481 INFO L470 AbstractCegarLoop]: Abstraction has has 124 places, 102 transitions, 290 flow [2021-12-22 13:50:05,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 70.66666666666667) internal successors, (1060), 15 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:05,482 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:05,482 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] [2021-12-22 13:50:05,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 13:50:05,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:05,708 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:05,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:05,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1208957137, now seen corresponding path program 2 times [2021-12-22 13:50:05,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:05,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885539534] [2021-12-22 13:50:05,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:05,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:06,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:50:06,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:06,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885539534] [2021-12-22 13:50:06,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885539534] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:50:06,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879640330] [2021-12-22 13:50:06,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:50:06,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:06,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:50:06,028 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) [2021-12-22 13:50:06,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 13:50:06,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:50:06,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:50:06,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-22 13:50:06,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:50:06,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 13:50:06,776 INFO L387 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 [2021-12-22 13:50:06,890 INFO L387 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 15 treesize of output 7 [2021-12-22 13:50:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:50:06,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:50:06,998 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_89 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_89) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) 5)) is different from false [2021-12-22 13:50:07,024 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:50:07,025 INFO L387 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 [2021-12-22 13:50:07,029 INFO L387 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 13 treesize of output 7 [2021-12-22 13:50:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:50:07,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879640330] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:50:07,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:50:07,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 30 [2021-12-22 13:50:07,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913396015] [2021-12-22 13:50:07,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:50:07,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-22 13:50:07,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:07,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-22 13:50:07,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=696, Unknown=1, NotChecked=54, Total=870 [2021-12-22 13:50:07,432 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 116 [2021-12-22 13:50:07,434 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 102 transitions, 290 flow. Second operand has 30 states, 30 states have (on average 63.93333333333333) internal successors, (1918), 30 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:07,434 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:07,434 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 116 [2021-12-22 13:50:07,434 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:07,909 INFO L129 PetriNetUnfolder]: 56/355 cut-off events. [2021-12-22 13:50:07,909 INFO L130 PetriNetUnfolder]: For 334/338 co-relation queries the response was YES. [2021-12-22 13:50:07,911 INFO L84 FinitePrefix]: Finished finitePrefix Result has 701 conditions, 355 events. 56/355 cut-off events. For 334/338 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1521 event pairs, 0 based on Foata normal form. 5/339 useless extension candidates. Maximal degree in co-relation 690. Up to 74 conditions per place. [2021-12-22 13:50:07,912 INFO L132 encePairwiseOnDemand]: 96/116 looper letters, 46 selfloop transitions, 25 changer transitions 9/134 dead transitions. [2021-12-22 13:50:07,913 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 134 transitions, 583 flow [2021-12-22 13:50:07,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 13:50:07,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-12-22 13:50:07,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1235 transitions. [2021-12-22 13:50:07,916 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5603448275862069 [2021-12-22 13:50:07,916 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1235 transitions. [2021-12-22 13:50:07,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1235 transitions. [2021-12-22 13:50:07,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:07,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1235 transitions. [2021-12-22 13:50:07,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 65.0) internal successors, (1235), 19 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:07,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 116.0) internal successors, (2320), 20 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:07,924 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 116.0) internal successors, (2320), 20 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:07,924 INFO L186 Difference]: Start difference. First operand has 124 places, 102 transitions, 290 flow. Second operand 19 states and 1235 transitions. [2021-12-22 13:50:07,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 134 transitions, 583 flow [2021-12-22 13:50:07,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 134 transitions, 530 flow, removed 5 selfloop flow, removed 15 redundant places. [2021-12-22 13:50:07,928 INFO L242 Difference]: Finished difference. Result has 130 places, 115 transitions, 415 flow [2021-12-22 13:50:07,929 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=415, PETRI_PLACES=130, PETRI_TRANSITIONS=115} [2021-12-22 13:50:07,929 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 27 predicate places. [2021-12-22 13:50:07,929 INFO L470 AbstractCegarLoop]: Abstraction has has 130 places, 115 transitions, 415 flow [2021-12-22 13:50:07,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 63.93333333333333) internal successors, (1918), 30 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:07,930 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:07,931 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] [2021-12-22 13:50:07,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 13:50:08,147 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,SelfDestructingSolverStorable5 [2021-12-22 13:50:08,148 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:08,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:08,148 INFO L85 PathProgramCache]: Analyzing trace with hash 664977125, now seen corresponding path program 3 times [2021-12-22 13:50:08,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:08,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110449075] [2021-12-22 13:50:08,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:08,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:08,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:08,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:50:08,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:08,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110449075] [2021-12-22 13:50:08,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110449075] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:50:08,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035848732] [2021-12-22 13:50:08,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 13:50:08,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:08,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:50:08,386 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) [2021-12-22 13:50:08,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 13:50:08,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-22 13:50:08,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:50:08,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-22 13:50:08,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:50:09,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 13:50:09,111 INFO L387 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 [2021-12-22 13:50:09,172 INFO L387 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 15 treesize of output 7 [2021-12-22 13:50:09,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:50:09,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:50:09,287 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_114 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_114) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2021-12-22 13:50:09,309 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:50:09,309 INFO L387 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 [2021-12-22 13:50:09,314 INFO L387 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 13 treesize of output 7 [2021-12-22 13:50:09,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:50:09,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035848732] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:50:09,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:50:09,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 30 [2021-12-22 13:50:09,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102314941] [2021-12-22 13:50:09,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:50:09,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-22 13:50:09,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:09,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-22 13:50:09,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=696, Unknown=1, NotChecked=54, Total=870 [2021-12-22 13:50:09,734 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 116 [2021-12-22 13:50:09,736 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 115 transitions, 415 flow. Second operand has 30 states, 30 states have (on average 63.9) internal successors, (1917), 30 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:09,736 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:09,736 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 116 [2021-12-22 13:50:09,736 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:10,155 INFO L129 PetriNetUnfolder]: 72/442 cut-off events. [2021-12-22 13:50:10,155 INFO L130 PetriNetUnfolder]: For 517/531 co-relation queries the response was YES. [2021-12-22 13:50:10,157 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1016 conditions, 442 events. 72/442 cut-off events. For 517/531 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2193 event pairs, 5 based on Foata normal form. 12/425 useless extension candidates. Maximal degree in co-relation 1002. Up to 106 conditions per place. [2021-12-22 13:50:10,159 INFO L132 encePairwiseOnDemand]: 96/116 looper letters, 52 selfloop transitions, 27 changer transitions 8/141 dead transitions. [2021-12-22 13:50:10,159 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 141 transitions, 745 flow [2021-12-22 13:50:10,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 13:50:10,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-12-22 13:50:10,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1232 transitions. [2021-12-22 13:50:10,163 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.558983666061706 [2021-12-22 13:50:10,163 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1232 transitions. [2021-12-22 13:50:10,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1232 transitions. [2021-12-22 13:50:10,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:10,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1232 transitions. [2021-12-22 13:50:10,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 64.84210526315789) internal successors, (1232), 19 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:10,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 116.0) internal successors, (2320), 20 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:10,172 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 116.0) internal successors, (2320), 20 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:10,172 INFO L186 Difference]: Start difference. First operand has 130 places, 115 transitions, 415 flow. Second operand 19 states and 1232 transitions. [2021-12-22 13:50:10,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 141 transitions, 745 flow [2021-12-22 13:50:10,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 141 transitions, 703 flow, removed 10 selfloop flow, removed 13 redundant places. [2021-12-22 13:50:10,179 INFO L242 Difference]: Finished difference. Result has 137 places, 123 transitions, 538 flow [2021-12-22 13:50:10,180 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=538, PETRI_PLACES=137, PETRI_TRANSITIONS=123} [2021-12-22 13:50:10,180 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 34 predicate places. [2021-12-22 13:50:10,181 INFO L470 AbstractCegarLoop]: Abstraction has has 137 places, 123 transitions, 538 flow [2021-12-22 13:50:10,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 63.9) internal successors, (1917), 30 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:10,182 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:10,182 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] [2021-12-22 13:50:10,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 13:50:10,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:10,396 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:10,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:10,396 INFO L85 PathProgramCache]: Analyzing trace with hash -2102566367, now seen corresponding path program 4 times [2021-12-22 13:50:10,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:10,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22680446] [2021-12-22 13:50:10,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:10,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:10,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:10,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:10,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22680446] [2021-12-22 13:50:10,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22680446] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:50:10,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831476857] [2021-12-22 13:50:10,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 13:50:10,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:10,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:50:10,536 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) [2021-12-22 13:50:10,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 13:50:10,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 13:50:10,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:50:10,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-22 13:50:10,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:50:11,113 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:11,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:50:11,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:11,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831476857] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:50:11,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:50:11,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2021-12-22 13:50:11,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009185150] [2021-12-22 13:50:11,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:50:11,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-22 13:50:11,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:11,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-22 13:50:11,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2021-12-22 13:50:11,551 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2021-12-22 13:50:11,553 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 123 transitions, 538 flow. Second operand has 25 states, 25 states have (on average 88.56) internal successors, (2214), 25 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:11,553 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:11,553 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2021-12-22 13:50:11,554 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:11,951 INFO L129 PetriNetUnfolder]: 67/613 cut-off events. [2021-12-22 13:50:11,951 INFO L130 PetriNetUnfolder]: For 1013/1039 co-relation queries the response was YES. [2021-12-22 13:50:11,953 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1321 conditions, 613 events. 67/613 cut-off events. For 1013/1039 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3831 event pairs, 2 based on Foata normal form. 41/608 useless extension candidates. Maximal degree in co-relation 1304. Up to 81 conditions per place. [2021-12-22 13:50:11,956 INFO L132 encePairwiseOnDemand]: 103/116 looper letters, 34 selfloop transitions, 21 changer transitions 21/154 dead transitions. [2021-12-22 13:50:11,956 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 154 transitions, 894 flow [2021-12-22 13:50:11,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:50:11,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-12-22 13:50:11,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1341 transitions. [2021-12-22 13:50:11,959 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7706896551724138 [2021-12-22 13:50:11,959 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1341 transitions. [2021-12-22 13:50:11,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1341 transitions. [2021-12-22 13:50:11,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:11,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1341 transitions. [2021-12-22 13:50:11,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 89.4) internal successors, (1341), 15 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:11,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 116.0) internal successors, (1856), 16 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:11,987 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 116.0) internal successors, (1856), 16 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:11,987 INFO L186 Difference]: Start difference. First operand has 137 places, 123 transitions, 538 flow. Second operand 15 states and 1341 transitions. [2021-12-22 13:50:11,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 154 transitions, 894 flow [2021-12-22 13:50:11,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 154 transitions, 852 flow, removed 2 selfloop flow, removed 15 redundant places. [2021-12-22 13:50:11,992 INFO L242 Difference]: Finished difference. Result has 141 places, 127 transitions, 605 flow [2021-12-22 13:50:11,992 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=605, PETRI_PLACES=141, PETRI_TRANSITIONS=127} [2021-12-22 13:50:11,993 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 38 predicate places. [2021-12-22 13:50:11,993 INFO L470 AbstractCegarLoop]: Abstraction has has 141 places, 127 transitions, 605 flow [2021-12-22 13:50:11,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 88.56) internal successors, (2214), 25 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:11,994 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:11,994 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] [2021-12-22 13:50:12,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 13:50:12,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:12,207 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:12,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:12,208 INFO L85 PathProgramCache]: Analyzing trace with hash 735680284, now seen corresponding path program 5 times [2021-12-22 13:50:12,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:12,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478650812] [2021-12-22 13:50:12,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:12,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:12,461 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 13:50:12,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:12,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478650812] [2021-12-22 13:50:12,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478650812] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:50:12,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194203445] [2021-12-22 13:50:12,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 13:50:12,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:12,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:50:12,463 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) [2021-12-22 13:50:12,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 13:50:12,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-22 13:50:12,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:50:12,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-22 13:50:12,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:50:12,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 13:50:12,758 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 13:50:12,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 13:50:13,111 INFO L387 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 [2021-12-22 13:50:13,159 INFO L387 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 15 treesize of output 7 [2021-12-22 13:50:13,197 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-22 13:50:13,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:50:13,271 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_168 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_168) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) 5)) is different from false [2021-12-22 13:50:13,283 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:50:13,283 INFO L387 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 [2021-12-22 13:50:13,287 INFO L387 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 13 treesize of output 7 [2021-12-22 13:50:13,832 INFO L387 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 10 treesize of output 8 [2021-12-22 13:50:13,867 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-22 13:50:13,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194203445] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:50:13,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:50:13,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 32 [2021-12-22 13:50:13,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717185301] [2021-12-22 13:50:13,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:50:13,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-22 13:50:13,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:13,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-22 13:50:13,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=803, Unknown=1, NotChecked=58, Total=992 [2021-12-22 13:50:13,871 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 116 [2021-12-22 13:50:13,873 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 127 transitions, 605 flow. Second operand has 32 states, 32 states have (on average 60.3125) internal successors, (1930), 32 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:13,873 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:13,873 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 116 [2021-12-22 13:50:13,873 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:14,432 INFO L129 PetriNetUnfolder]: 112/671 cut-off events. [2021-12-22 13:50:14,432 INFO L130 PetriNetUnfolder]: For 1707/1724 co-relation queries the response was YES. [2021-12-22 13:50:14,434 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1841 conditions, 671 events. 112/671 cut-off events. For 1707/1724 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 4246 event pairs, 6 based on Foata normal form. 15/637 useless extension candidates. Maximal degree in co-relation 1818. Up to 153 conditions per place. [2021-12-22 13:50:14,438 INFO L132 encePairwiseOnDemand]: 96/116 looper letters, 65 selfloop transitions, 42 changer transitions 10/172 dead transitions. [2021-12-22 13:50:14,438 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 172 transitions, 1206 flow [2021-12-22 13:50:14,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 13:50:14,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-22 13:50:14,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1228 transitions. [2021-12-22 13:50:14,441 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5293103448275862 [2021-12-22 13:50:14,441 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1228 transitions. [2021-12-22 13:50:14,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1228 transitions. [2021-12-22 13:50:14,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:14,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1228 transitions. [2021-12-22 13:50:14,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 61.4) internal successors, (1228), 20 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:14,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 116.0) internal successors, (2436), 21 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:14,449 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 116.0) internal successors, (2436), 21 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:14,449 INFO L186 Difference]: Start difference. First operand has 141 places, 127 transitions, 605 flow. Second operand 20 states and 1228 transitions. [2021-12-22 13:50:14,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 172 transitions, 1206 flow [2021-12-22 13:50:14,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 172 transitions, 1143 flow, removed 26 selfloop flow, removed 8 redundant places. [2021-12-22 13:50:14,456 INFO L242 Difference]: Finished difference. Result has 155 places, 149 transitions, 981 flow [2021-12-22 13:50:14,456 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=981, PETRI_PLACES=155, PETRI_TRANSITIONS=149} [2021-12-22 13:50:14,457 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 52 predicate places. [2021-12-22 13:50:14,457 INFO L470 AbstractCegarLoop]: Abstraction has has 155 places, 149 transitions, 981 flow [2021-12-22 13:50:14,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 60.3125) internal successors, (1930), 32 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:14,458 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:14,458 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] [2021-12-22 13:50:14,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 13:50:14,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:14,672 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:14,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:14,672 INFO L85 PathProgramCache]: Analyzing trace with hash -179513234, now seen corresponding path program 6 times [2021-12-22 13:50:14,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:14,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940393255] [2021-12-22 13:50:14,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:14,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:14,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:15,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:15,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940393255] [2021-12-22 13:50:15,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940393255] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:50:15,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298773876] [2021-12-22 13:50:15,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-22 13:50:15,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:15,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:50:15,197 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) [2021-12-22 13:50:15,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 13:50:15,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-22 13:50:15,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:50:15,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-22 13:50:15,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:50:16,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 13:50:16,042 INFO L387 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 [2021-12-22 13:50:16,115 INFO L387 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 15 treesize of output 7 [2021-12-22 13:50:16,154 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 13:50:16,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:50:16,224 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_197 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_197) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2021-12-22 13:50:16,258 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:50:16,259 INFO L387 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 [2021-12-22 13:50:16,263 INFO L387 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 13 treesize of output 7 [2021-12-22 13:50:16,609 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 4 not checked. [2021-12-22 13:50:16,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298773876] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:50:16,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:50:16,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15, 14] total 40 [2021-12-22 13:50:16,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299555152] [2021-12-22 13:50:16,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:50:16,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-22 13:50:16,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:16,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-22 13:50:16,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1299, Unknown=1, NotChecked=74, Total=1560 [2021-12-22 13:50:16,613 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 116 [2021-12-22 13:50:16,615 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 149 transitions, 981 flow. Second operand has 40 states, 40 states have (on average 53.325) internal successors, (2133), 40 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:16,615 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:16,615 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 116 [2021-12-22 13:50:16,615 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:17,442 INFO L129 PetriNetUnfolder]: 117/725 cut-off events. [2021-12-22 13:50:17,443 INFO L130 PetriNetUnfolder]: For 2209/2230 co-relation queries the response was YES. [2021-12-22 13:50:17,446 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2094 conditions, 725 events. 117/725 cut-off events. For 2209/2230 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4759 event pairs, 2 based on Foata normal form. 12/682 useless extension candidates. Maximal degree in co-relation 2068. Up to 115 conditions per place. [2021-12-22 13:50:17,449 INFO L132 encePairwiseOnDemand]: 94/116 looper letters, 68 selfloop transitions, 50 changer transitions 8/169 dead transitions. [2021-12-22 13:50:17,449 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 169 transitions, 1357 flow [2021-12-22 13:50:17,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 13:50:17,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-22 13:50:17,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1177 transitions. [2021-12-22 13:50:17,454 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.46120689655172414 [2021-12-22 13:50:17,454 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1177 transitions. [2021-12-22 13:50:17,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1177 transitions. [2021-12-22 13:50:17,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:17,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1177 transitions. [2021-12-22 13:50:17,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 53.5) internal successors, (1177), 22 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:17,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 116.0) internal successors, (2668), 23 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:17,468 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 116.0) internal successors, (2668), 23 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:17,469 INFO L186 Difference]: Start difference. First operand has 155 places, 149 transitions, 981 flow. Second operand 22 states and 1177 transitions. [2021-12-22 13:50:17,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 169 transitions, 1357 flow [2021-12-22 13:50:17,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 169 transitions, 1283 flow, removed 14 selfloop flow, removed 15 redundant places. [2021-12-22 13:50:17,478 INFO L242 Difference]: Finished difference. Result has 163 places, 151 transitions, 1070 flow [2021-12-22 13:50:17,480 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=910, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1070, PETRI_PLACES=163, PETRI_TRANSITIONS=151} [2021-12-22 13:50:17,481 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 60 predicate places. [2021-12-22 13:50:17,481 INFO L470 AbstractCegarLoop]: Abstraction has has 163 places, 151 transitions, 1070 flow [2021-12-22 13:50:17,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 53.325) internal successors, (2133), 40 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:17,482 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:17,482 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] [2021-12-22 13:50:17,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 13:50:17,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:17,696 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:17,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:17,696 INFO L85 PathProgramCache]: Analyzing trace with hash 922780630, now seen corresponding path program 7 times [2021-12-22 13:50:17,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:17,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830252248] [2021-12-22 13:50:17,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:17,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:17,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:17,742 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 13:50:17,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:17,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830252248] [2021-12-22 13:50:17,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830252248] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:50:17,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086776766] [2021-12-22 13:50:17,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-22 13:50:17,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:17,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:50:17,744 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:50:17,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 13:50:17,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:17,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 13:50:17,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:50:18,008 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-22 13:50:18,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:50:18,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086776766] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:18,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:50:18,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-22 13:50:18,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430637124] [2021-12-22 13:50:18,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:18,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:50:18,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:18,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:50:18,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:50:18,011 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2021-12-22 13:50:18,011 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 151 transitions, 1070 flow. Second operand has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:18,011 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:18,012 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2021-12-22 13:50:18,012 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:18,127 INFO L129 PetriNetUnfolder]: 105/764 cut-off events. [2021-12-22 13:50:18,127 INFO L130 PetriNetUnfolder]: For 2908/2924 co-relation queries the response was YES. [2021-12-22 13:50:18,130 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2084 conditions, 764 events. 105/764 cut-off events. For 2908/2924 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5252 event pairs, 6 based on Foata normal form. 23/734 useless extension candidates. Maximal degree in co-relation 2056. Up to 133 conditions per place. [2021-12-22 13:50:18,133 INFO L132 encePairwiseOnDemand]: 113/116 looper letters, 35 selfloop transitions, 21 changer transitions 2/162 dead transitions. [2021-12-22 13:50:18,133 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 162 transitions, 1280 flow [2021-12-22 13:50:18,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 13:50:18,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-22 13:50:18,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 425 transitions. [2021-12-22 13:50:18,134 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.915948275862069 [2021-12-22 13:50:18,134 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 425 transitions. [2021-12-22 13:50:18,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 425 transitions. [2021-12-22 13:50:18,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:18,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 425 transitions. [2021-12-22 13:50:18,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 106.25) internal successors, (425), 4 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:18,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:18,137 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:18,137 INFO L186 Difference]: Start difference. First operand has 163 places, 151 transitions, 1070 flow. Second operand 4 states and 425 transitions. [2021-12-22 13:50:18,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 162 transitions, 1280 flow [2021-12-22 13:50:18,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 162 transitions, 1186 flow, removed 13 selfloop flow, removed 19 redundant places. [2021-12-22 13:50:18,145 INFO L242 Difference]: Finished difference. Result has 147 places, 154 transitions, 1116 flow [2021-12-22 13:50:18,146 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1116, PETRI_PLACES=147, PETRI_TRANSITIONS=154} [2021-12-22 13:50:18,146 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 44 predicate places. [2021-12-22 13:50:18,146 INFO L470 AbstractCegarLoop]: Abstraction has has 147 places, 154 transitions, 1116 flow [2021-12-22 13:50:18,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:18,147 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:18,147 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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] [2021-12-22 13:50:18,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 13:50:18,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:18,367 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:18,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:18,368 INFO L85 PathProgramCache]: Analyzing trace with hash -565034456, now seen corresponding path program 8 times [2021-12-22 13:50:18,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:18,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378199621] [2021-12-22 13:50:18,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:18,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:18,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:18,581 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 13:50:18,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:18,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378199621] [2021-12-22 13:50:18,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378199621] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:50:18,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107797139] [2021-12-22 13:50:18,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:50:18,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:18,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:50:18,584 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:50:18,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 13:50:18,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:50:18,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:50:18,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-22 13:50:18,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:50:19,043 INFO L387 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 19 treesize of output 7 [2021-12-22 13:50:19,077 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 13:50:19,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:50:19,146 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 13:50:19,146 INFO L387 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 28 treesize of output 13 [2021-12-22 13:50:19,305 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 13:50:19,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107797139] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:50:19,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:50:19,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 9] total 22 [2021-12-22 13:50:19,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901050108] [2021-12-22 13:50:19,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:50:19,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-22 13:50:19,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:19,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-22 13:50:19,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-12-22 13:50:19,309 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 116 [2021-12-22 13:50:19,310 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 154 transitions, 1116 flow. Second operand has 22 states, 22 states have (on average 69.95454545454545) internal successors, (1539), 22 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:19,310 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:19,310 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 116 [2021-12-22 13:50:19,310 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:20,115 INFO L129 PetriNetUnfolder]: 153/985 cut-off events. [2021-12-22 13:50:20,115 INFO L130 PetriNetUnfolder]: For 4329/4352 co-relation queries the response was YES. [2021-12-22 13:50:20,122 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2990 conditions, 985 events. 153/985 cut-off events. For 4329/4352 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 7335 event pairs, 0 based on Foata normal form. 15/928 useless extension candidates. Maximal degree in co-relation 2962. Up to 177 conditions per place. [2021-12-22 13:50:20,127 INFO L132 encePairwiseOnDemand]: 100/116 looper letters, 88 selfloop transitions, 62 changer transitions 45/257 dead transitions. [2021-12-22 13:50:20,127 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 257 transitions, 2205 flow [2021-12-22 13:50:20,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-22 13:50:20,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-22 13:50:20,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2602 transitions. [2021-12-22 13:50:20,133 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6062441752096924 [2021-12-22 13:50:20,133 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2602 transitions. [2021-12-22 13:50:20,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2602 transitions. [2021-12-22 13:50:20,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:20,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2602 transitions. [2021-12-22 13:50:20,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 70.32432432432432) internal successors, (2602), 37 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:20,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 116.0) internal successors, (4408), 38 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:20,157 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 116.0) internal successors, (4408), 38 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:20,157 INFO L186 Difference]: Start difference. First operand has 147 places, 154 transitions, 1116 flow. Second operand 37 states and 2602 transitions. [2021-12-22 13:50:20,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 257 transitions, 2205 flow [2021-12-22 13:50:20,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 257 transitions, 2193 flow, removed 6 selfloop flow, removed 0 redundant places. [2021-12-22 13:50:20,173 INFO L242 Difference]: Finished difference. Result has 198 places, 164 transitions, 1460 flow [2021-12-22 13:50:20,174 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=1110, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1460, PETRI_PLACES=198, PETRI_TRANSITIONS=164} [2021-12-22 13:50:20,175 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 95 predicate places. [2021-12-22 13:50:20,175 INFO L470 AbstractCegarLoop]: Abstraction has has 198 places, 164 transitions, 1460 flow [2021-12-22 13:50:20,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 69.95454545454545) internal successors, (1539), 22 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:20,176 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:20,176 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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] [2021-12-22 13:50:20,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 13:50:20,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-22 13:50:20,392 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:20,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:20,392 INFO L85 PathProgramCache]: Analyzing trace with hash 714619008, now seen corresponding path program 9 times [2021-12-22 13:50:20,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:20,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788808258] [2021-12-22 13:50:20,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:20,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 13:50:20,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:20,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788808258] [2021-12-22 13:50:20,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788808258] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:50:20,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336026194] [2021-12-22 13:50:20,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 13:50:20,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:20,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:50:20,669 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:50:20,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 13:50:20,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-22 13:50:20,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:50:20,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-22 13:50:20,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:50:20,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 13:50:21,190 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 13:50:21,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 13:50:21,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-22 13:50:21,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 13:50:21,890 INFO L387 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 21 treesize of output 23 [2021-12-22 13:50:24,280 INFO L353 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-12-22 13:50:24,280 INFO L387 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 27 treesize of output 10 [2021-12-22 13:50:24,303 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 3 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 13:50:24,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:50:25,646 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:50:25,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 49 [2021-12-22 13:50:25,657 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:50:25,658 INFO L387 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 192 treesize of output 183 [2021-12-22 13:50:25,665 INFO L387 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 136 treesize of output 108 [2021-12-22 13:50:25,678 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:50:25,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 132 [2021-12-22 13:50:27,073 INFO L387 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 10 treesize of output 8 [2021-12-22 13:50:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 13:50:27,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336026194] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:50:27,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:50:27,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 25, 25] total 57 [2021-12-22 13:50:27,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31521339] [2021-12-22 13:50:27,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:50:27,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-22 13:50:27,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:27,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-22 13:50:27,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=2867, Unknown=15, NotChecked=0, Total=3192 [2021-12-22 13:50:27,158 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 116 [2021-12-22 13:50:27,160 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 164 transitions, 1460 flow. Second operand has 57 states, 57 states have (on average 48.771929824561404) internal successors, (2780), 57 states have internal predecessors, (2780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:27,160 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:27,160 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 116 [2021-12-22 13:50:27,160 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:34,709 INFO L129 PetriNetUnfolder]: 472/2694 cut-off events. [2021-12-22 13:50:34,709 INFO L130 PetriNetUnfolder]: For 15844/15907 co-relation queries the response was YES. [2021-12-22 13:50:34,725 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8712 conditions, 2694 events. 472/2694 cut-off events. For 15844/15907 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 27046 event pairs, 15 based on Foata normal form. 35/2501 useless extension candidates. Maximal degree in co-relation 8667. Up to 512 conditions per place. [2021-12-22 13:50:34,738 INFO L132 encePairwiseOnDemand]: 83/116 looper letters, 155 selfloop transitions, 182 changer transitions 22/399 dead transitions. [2021-12-22 13:50:34,738 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 399 transitions, 4943 flow [2021-12-22 13:50:34,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-22 13:50:34,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-12-22 13:50:34,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 2890 transitions. [2021-12-22 13:50:34,767 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.42954815695600473 [2021-12-22 13:50:34,767 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 2890 transitions. [2021-12-22 13:50:34,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 2890 transitions. [2021-12-22 13:50:34,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:34,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 2890 transitions. [2021-12-22 13:50:34,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 49.827586206896555) internal successors, (2890), 58 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:34,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 116.0) internal successors, (6844), 59 states have internal predecessors, (6844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:34,783 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 116.0) internal successors, (6844), 59 states have internal predecessors, (6844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:34,783 INFO L186 Difference]: Start difference. First operand has 198 places, 164 transitions, 1460 flow. Second operand 58 states and 2890 transitions. [2021-12-22 13:50:34,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 399 transitions, 4943 flow [2021-12-22 13:50:34,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 399 transitions, 4230 flow, removed 197 selfloop flow, removed 27 redundant places. [2021-12-22 13:50:34,819 INFO L242 Difference]: Finished difference. Result has 239 places, 315 transitions, 3713 flow [2021-12-22 13:50:34,819 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=3713, PETRI_PLACES=239, PETRI_TRANSITIONS=315} [2021-12-22 13:50:34,820 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 136 predicate places. [2021-12-22 13:50:34,820 INFO L470 AbstractCegarLoop]: Abstraction has has 239 places, 315 transitions, 3713 flow [2021-12-22 13:50:34,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 48.771929824561404) internal successors, (2780), 57 states have internal predecessors, (2780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:34,821 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:34,821 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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] [2021-12-22 13:50:34,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 13:50:35,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-22 13:50:35,035 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:35,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:35,036 INFO L85 PathProgramCache]: Analyzing trace with hash 2090811098, now seen corresponding path program 10 times [2021-12-22 13:50:35,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:35,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512313326] [2021-12-22 13:50:35,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:35,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:35,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:35,340 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 13:50:35,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:35,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512313326] [2021-12-22 13:50:35,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512313326] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:50:35,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397093754] [2021-12-22 13:50:35,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 13:50:35,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:35,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:50:35,344 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:50:35,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 13:50:35,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 13:50:35,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:50:35,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-22 13:50:35,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:50:35,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 13:50:35,628 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 13:50:35,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 13:50:36,020 INFO L387 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 19 treesize of output 21 [2021-12-22 13:50:36,114 INFO L387 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 19 treesize of output 7 [2021-12-22 13:50:36,144 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:50:36,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:50:36,243 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_316 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_316) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)))) is different from false [2021-12-22 13:50:36,264 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:50:36,265 INFO L387 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 47 treesize of output 47 [2021-12-22 13:50:36,269 INFO L387 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 14 treesize of output 7 [2021-12-22 13:50:36,776 INFO L387 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 10 treesize of output 8 [2021-12-22 13:50:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 13:50:36,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397093754] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:50:36,819 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:50:36,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 16] total 39 [2021-12-22 13:50:36,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853002636] [2021-12-22 13:50:36,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:50:36,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-22 13:50:36,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:36,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-22 13:50:36,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1247, Unknown=1, NotChecked=72, Total=1482 [2021-12-22 13:50:36,822 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 116 [2021-12-22 13:50:36,824 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 315 transitions, 3713 flow. Second operand has 39 states, 39 states have (on average 55.15384615384615) internal successors, (2151), 39 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:36,824 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:36,824 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 116 [2021-12-22 13:50:36,824 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:37,984 INFO L129 PetriNetUnfolder]: 513/2875 cut-off events. [2021-12-22 13:50:37,984 INFO L130 PetriNetUnfolder]: For 22299/22460 co-relation queries the response was YES. [2021-12-22 13:50:37,998 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11056 conditions, 2875 events. 513/2875 cut-off events. For 22299/22460 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 29523 event pairs, 2 based on Foata normal form. 66/2689 useless extension candidates. Maximal degree in co-relation 11002. Up to 582 conditions per place. [2021-12-22 13:50:38,012 INFO L132 encePairwiseOnDemand]: 94/116 looper letters, 162 selfloop transitions, 186 changer transitions 40/433 dead transitions. [2021-12-22 13:50:38,012 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 433 transitions, 6029 flow [2021-12-22 13:50:38,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-22 13:50:38,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-12-22 13:50:38,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1523 transitions. [2021-12-22 13:50:38,021 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.48627075351213284 [2021-12-22 13:50:38,021 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1523 transitions. [2021-12-22 13:50:38,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1523 transitions. [2021-12-22 13:50:38,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:38,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1523 transitions. [2021-12-22 13:50:38,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 56.407407407407405) internal successors, (1523), 27 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:38,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 116.0) internal successors, (3248), 28 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:38,030 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 116.0) internal successors, (3248), 28 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:38,031 INFO L186 Difference]: Start difference. First operand has 239 places, 315 transitions, 3713 flow. Second operand 27 states and 1523 transitions. [2021-12-22 13:50:38,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 433 transitions, 6029 flow [2021-12-22 13:50:38,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 433 transitions, 5444 flow, removed 263 selfloop flow, removed 23 redundant places. [2021-12-22 13:50:38,105 INFO L242 Difference]: Finished difference. Result has 240 places, 339 transitions, 4182 flow [2021-12-22 13:50:38,106 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=3290, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4182, PETRI_PLACES=240, PETRI_TRANSITIONS=339} [2021-12-22 13:50:38,106 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 137 predicate places. [2021-12-22 13:50:38,106 INFO L470 AbstractCegarLoop]: Abstraction has has 240 places, 339 transitions, 4182 flow [2021-12-22 13:50:38,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 55.15384615384615) internal successors, (2151), 39 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:38,107 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:38,107 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 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] [2021-12-22 13:50:38,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 13:50:38,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-22 13:50:38,323 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:38,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:38,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1805760562, now seen corresponding path program 11 times [2021-12-22 13:50:38,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:38,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925749358] [2021-12-22 13:50:38,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:38,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:38,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:38,386 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 13:50:38,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:38,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925749358] [2021-12-22 13:50:38,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925749358] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:50:38,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362794102] [2021-12-22 13:50:38,387 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 13:50:38,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:38,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:50:38,392 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:50:38,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 13:50:38,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-22 13:50:38,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:50:38,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 13:50:38,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:50:38,740 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 13:50:38,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:50:38,938 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 13:50:38,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362794102] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:50:38,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:50:38,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2021-12-22 13:50:38,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743772190] [2021-12-22 13:50:38,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:50:38,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:50:38,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:38,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:50:38,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:50:38,940 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2021-12-22 13:50:38,941 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 339 transitions, 4182 flow. Second operand has 6 states, 6 states have (on average 104.16666666666667) internal successors, (625), 6 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:38,941 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:38,941 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2021-12-22 13:50:38,941 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:39,656 INFO L129 PetriNetUnfolder]: 633/3696 cut-off events. [2021-12-22 13:50:39,656 INFO L130 PetriNetUnfolder]: For 32884/33076 co-relation queries the response was YES. [2021-12-22 13:50:39,678 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14145 conditions, 3696 events. 633/3696 cut-off events. For 32884/33076 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 40215 event pairs, 53 based on Foata normal form. 102/3473 useless extension candidates. Maximal degree in co-relation 14091. Up to 778 conditions per place. [2021-12-22 13:50:39,698 INFO L132 encePairwiseOnDemand]: 113/116 looper letters, 108 selfloop transitions, 165 changer transitions 15/419 dead transitions. [2021-12-22 13:50:39,699 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 419 transitions, 6038 flow [2021-12-22 13:50:39,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:50:39,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-22 13:50:39,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 532 transitions. [2021-12-22 13:50:39,703 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9172413793103448 [2021-12-22 13:50:39,703 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 532 transitions. [2021-12-22 13:50:39,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 532 transitions. [2021-12-22 13:50:39,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:39,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 532 transitions. [2021-12-22 13:50:39,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 106.4) internal successors, (532), 5 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:39,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:39,706 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:39,707 INFO L186 Difference]: Start difference. First operand has 240 places, 339 transitions, 4182 flow. Second operand 5 states and 532 transitions. [2021-12-22 13:50:39,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 419 transitions, 6038 flow [2021-12-22 13:50:39,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 419 transitions, 5438 flow, removed 78 selfloop flow, removed 24 redundant places. [2021-12-22 13:50:39,797 INFO L242 Difference]: Finished difference. Result has 220 places, 391 transitions, 5302 flow [2021-12-22 13:50:39,797 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=3568, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5302, PETRI_PLACES=220, PETRI_TRANSITIONS=391} [2021-12-22 13:50:39,797 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 117 predicate places. [2021-12-22 13:50:39,798 INFO L470 AbstractCegarLoop]: Abstraction has has 220 places, 391 transitions, 5302 flow [2021-12-22 13:50:39,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 104.16666666666667) internal successors, (625), 6 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:39,798 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:39,798 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-12-22 13:50:39,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-22 13:50:39,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-22 13:50:39,999 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:39,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:40,000 INFO L85 PathProgramCache]: Analyzing trace with hash 747006950, now seen corresponding path program 12 times [2021-12-22 13:50:40,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:40,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284198039] [2021-12-22 13:50:40,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:40,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:40,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:40,211 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 13:50:40,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:40,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284198039] [2021-12-22 13:50:40,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284198039] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:50:40,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403831484] [2021-12-22 13:50:40,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-22 13:50:40,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:40,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:50:40,213 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:50:40,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 13:50:40,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-22 13:50:40,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:50:40,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-22 13:50:40,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:50:40,986 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 13:50:40,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:50:41,497 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 13:50:41,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403831484] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:50:41,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:50:41,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2021-12-22 13:50:41,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176313155] [2021-12-22 13:50:41,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:50:41,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-22 13:50:41,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:41,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-22 13:50:41,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2021-12-22 13:50:41,500 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2021-12-22 13:50:41,501 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 391 transitions, 5302 flow. Second operand has 34 states, 34 states have (on average 88.41176470588235) internal successors, (3006), 34 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:41,501 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:41,501 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2021-12-22 13:50:41,501 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:42,783 INFO L129 PetriNetUnfolder]: 701/4379 cut-off events. [2021-12-22 13:50:42,783 INFO L130 PetriNetUnfolder]: For 40477/40684 co-relation queries the response was YES. [2021-12-22 13:50:42,803 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17474 conditions, 4379 events. 701/4379 cut-off events. For 40477/40684 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 49811 event pairs, 76 based on Foata normal form. 79/4085 useless extension candidates. Maximal degree in co-relation 17420. Up to 899 conditions per place. [2021-12-22 13:50:42,817 INFO L132 encePairwiseOnDemand]: 102/116 looper letters, 95 selfloop transitions, 268 changer transitions 14/477 dead transitions. [2021-12-22 13:50:42,818 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 477 transitions, 7497 flow [2021-12-22 13:50:42,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-22 13:50:42,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-12-22 13:50:42,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2498 transitions. [2021-12-22 13:50:42,821 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7690886699507389 [2021-12-22 13:50:42,821 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2498 transitions. [2021-12-22 13:50:42,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2498 transitions. [2021-12-22 13:50:42,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:42,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2498 transitions. [2021-12-22 13:50:42,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 89.21428571428571) internal successors, (2498), 28 states have internal predecessors, (2498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:42,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 116.0) internal successors, (3364), 29 states have internal predecessors, (3364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:42,830 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 116.0) internal successors, (3364), 29 states have internal predecessors, (3364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:42,830 INFO L186 Difference]: Start difference. First operand has 220 places, 391 transitions, 5302 flow. Second operand 28 states and 2498 transitions. [2021-12-22 13:50:42,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 477 transitions, 7497 flow [2021-12-22 13:50:42,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 477 transitions, 7377 flow, removed 60 selfloop flow, removed 2 redundant places. [2021-12-22 13:50:42,921 INFO L242 Difference]: Finished difference. Result has 247 places, 433 transitions, 7027 flow [2021-12-22 13:50:42,921 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=4959, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=7027, PETRI_PLACES=247, PETRI_TRANSITIONS=433} [2021-12-22 13:50:42,921 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 144 predicate places. [2021-12-22 13:50:42,922 INFO L470 AbstractCegarLoop]: Abstraction has has 247 places, 433 transitions, 7027 flow [2021-12-22 13:50:42,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 88.41176470588235) internal successors, (3006), 34 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:42,922 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:42,923 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-12-22 13:50:42,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-22 13:50:43,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-22 13:50:43,135 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:43,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:43,136 INFO L85 PathProgramCache]: Analyzing trace with hash 814263626, now seen corresponding path program 13 times [2021-12-22 13:50:43,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:43,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31413423] [2021-12-22 13:50:43,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:43,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:43,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:43,326 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:50:43,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:43,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31413423] [2021-12-22 13:50:43,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31413423] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:50:43,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238941176] [2021-12-22 13:50:43,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-22 13:50:43,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:43,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:50:43,327 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:50:43,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-22 13:50:43,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:43,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-22 13:50:43,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:50:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:50:44,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:50:44,657 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:50:44,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238941176] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:50:44,658 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:50:44,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2021-12-22 13:50:44,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518258237] [2021-12-22 13:50:44,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:50:44,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-22 13:50:44,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:44,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-22 13:50:44,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1229, Unknown=0, NotChecked=0, Total=1560 [2021-12-22 13:50:44,661 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2021-12-22 13:50:44,663 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 433 transitions, 7027 flow. Second operand has 40 states, 40 states have (on average 88.15) internal successors, (3526), 40 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:44,663 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:44,663 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2021-12-22 13:50:44,663 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:45,830 INFO L129 PetriNetUnfolder]: 384/2732 cut-off events. [2021-12-22 13:50:45,830 INFO L130 PetriNetUnfolder]: For 27244/27327 co-relation queries the response was YES. [2021-12-22 13:50:45,846 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11112 conditions, 2732 events. 384/2732 cut-off events. For 27244/27327 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 27965 event pairs, 49 based on Foata normal form. 45/2537 useless extension candidates. Maximal degree in co-relation 11054. Up to 512 conditions per place. [2021-12-22 13:50:45,855 INFO L132 encePairwiseOnDemand]: 102/116 looper letters, 142 selfloop transitions, 48 changer transitions 79/358 dead transitions. [2021-12-22 13:50:45,855 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 358 transitions, 5666 flow [2021-12-22 13:50:45,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-22 13:50:45,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-12-22 13:50:45,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2134 transitions. [2021-12-22 13:50:45,859 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7665229885057471 [2021-12-22 13:50:45,859 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2134 transitions. [2021-12-22 13:50:45,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2134 transitions. [2021-12-22 13:50:45,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:45,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2134 transitions. [2021-12-22 13:50:45,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 88.91666666666667) internal successors, (2134), 24 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:45,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 116.0) internal successors, (2900), 25 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:45,866 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 116.0) internal successors, (2900), 25 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:45,866 INFO L186 Difference]: Start difference. First operand has 247 places, 433 transitions, 7027 flow. Second operand 24 states and 2134 transitions. [2021-12-22 13:50:45,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 358 transitions, 5666 flow [2021-12-22 13:50:45,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 358 transitions, 5089 flow, removed 40 selfloop flow, removed 22 redundant places. [2021-12-22 13:50:45,951 INFO L242 Difference]: Finished difference. Result has 247 places, 273 transitions, 3377 flow [2021-12-22 13:50:45,951 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=4297, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3377, PETRI_PLACES=247, PETRI_TRANSITIONS=273} [2021-12-22 13:50:45,952 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 144 predicate places. [2021-12-22 13:50:45,952 INFO L470 AbstractCegarLoop]: Abstraction has has 247 places, 273 transitions, 3377 flow [2021-12-22 13:50:45,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 88.15) internal successors, (3526), 40 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:45,953 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:45,953 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:50:45,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-22 13:50:46,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-22 13:50:46,178 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:46,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:46,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1450005569, now seen corresponding path program 14 times [2021-12-22 13:50:46,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:46,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637031930] [2021-12-22 13:50:46,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:46,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:46,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:46,620 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:46,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:46,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637031930] [2021-12-22 13:50:46,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637031930] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:50:46,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630199618] [2021-12-22 13:50:46,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:50:46,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:46,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:50:46,624 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:50:46,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-22 13:50:46,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:50:46,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:50:46,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-22 13:50:46,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:50:47,131 INFO L387 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 19 treesize of output 7 [2021-12-22 13:50:47,181 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-22 13:50:47,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:50:47,303 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 13:50:47,304 INFO L387 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 28 treesize of output 13 [2021-12-22 13:50:47,485 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-22 13:50:47,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630199618] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:50:47,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:50:47,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13, 11] total 33 [2021-12-22 13:50:47,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740638019] [2021-12-22 13:50:47,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:50:47,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-22 13:50:47,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:47,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-22 13:50:47,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-12-22 13:50:47,488 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 116 [2021-12-22 13:50:47,489 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 273 transitions, 3377 flow. Second operand has 33 states, 33 states have (on average 63.666666666666664) internal successors, (2101), 33 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:47,489 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:47,490 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 116 [2021-12-22 13:50:47,490 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:49,580 INFO L129 PetriNetUnfolder]: 563/3179 cut-off events. [2021-12-22 13:50:49,580 INFO L130 PetriNetUnfolder]: For 27980/28058 co-relation queries the response was YES. [2021-12-22 13:50:49,594 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12921 conditions, 3179 events. 563/3179 cut-off events. For 27980/28058 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 32874 event pairs, 2 based on Foata normal form. 24/2929 useless extension candidates. Maximal degree in co-relation 12869. Up to 697 conditions per place. [2021-12-22 13:50:49,607 INFO L132 encePairwiseOnDemand]: 96/116 looper letters, 191 selfloop transitions, 206 changer transitions 106/553 dead transitions. [2021-12-22 13:50:49,607 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 553 transitions, 8088 flow [2021-12-22 13:50:49,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-22 13:50:49,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-12-22 13:50:49,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 5137 transitions. [2021-12-22 13:50:49,613 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5535560344827586 [2021-12-22 13:50:49,613 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 5137 transitions. [2021-12-22 13:50:49,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 5137 transitions. [2021-12-22 13:50:49,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:49,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 5137 transitions. [2021-12-22 13:50:49,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 64.2125) internal successors, (5137), 80 states have internal predecessors, (5137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:49,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 116.0) internal successors, (9396), 81 states have internal predecessors, (9396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:49,634 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 116.0) internal successors, (9396), 81 states have internal predecessors, (9396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:49,634 INFO L186 Difference]: Start difference. First operand has 247 places, 273 transitions, 3377 flow. Second operand 80 states and 5137 transitions. [2021-12-22 13:50:49,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 553 transitions, 8088 flow [2021-12-22 13:50:49,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 553 transitions, 7293 flow, removed 352 selfloop flow, removed 24 redundant places. [2021-12-22 13:50:49,708 INFO L242 Difference]: Finished difference. Result has 316 places, 322 transitions, 4795 flow [2021-12-22 13:50:49,708 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=3256, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=4795, PETRI_PLACES=316, PETRI_TRANSITIONS=322} [2021-12-22 13:50:49,709 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 213 predicate places. [2021-12-22 13:50:49,709 INFO L470 AbstractCegarLoop]: Abstraction has has 316 places, 322 transitions, 4795 flow [2021-12-22 13:50:49,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 63.666666666666664) internal successors, (2101), 33 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:49,709 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:49,710 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:50:49,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-22 13:50:49,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:49,923 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:49,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:49,924 INFO L85 PathProgramCache]: Analyzing trace with hash -843056299, now seen corresponding path program 15 times [2021-12-22 13:50:49,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:49,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536788319] [2021-12-22 13:50:49,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:49,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:49,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:50,446 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:50,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:50,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536788319] [2021-12-22 13:50:50,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536788319] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:50:50,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623797826] [2021-12-22 13:50:50,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 13:50:50,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:50,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:50:50,448 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:50:50,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-22 13:50:50,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-22 13:50:50,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:50:50,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-22 13:50:50,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:50:51,479 INFO L387 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 [2021-12-22 13:50:51,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 13:50:52,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 13:50:52,149 INFO L387 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 21 treesize of output 23 [2021-12-22 13:50:52,675 INFO L353 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2021-12-22 13:50:52,675 INFO L387 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 26 treesize of output 10 [2021-12-22 13:50:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:52,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:50:55,185 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:50:55,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2021-12-22 13:50:55,195 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:50:55,196 INFO L387 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 184 treesize of output 176 [2021-12-22 13:50:55,202 INFO L387 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 130 treesize of output 106 [2021-12-22 13:50:55,214 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:50:55,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 131