./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/systemc/token_ring.02.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/systemc/token_ring.02.cil-1.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 44ef362a593e25f5681bc4a034b065cd86559bd3dd750386bca2a1f270891ccd --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 14:52:22,393 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 14:52:22,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 14:52:22,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 14:52:22,412 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 14:52:22,413 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 14:52:22,414 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 14:52:22,415 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 14:52:22,416 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 14:52:22,417 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 14:52:22,418 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 14:52:22,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 14:52:22,419 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 14:52:22,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 14:52:22,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 14:52:22,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 14:52:22,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 14:52:22,422 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 14:52:22,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 14:52:22,425 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 14:52:22,426 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 14:52:22,427 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 14:52:22,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 14:52:22,428 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 14:52:22,430 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 14:52:22,430 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 14:52:22,431 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 14:52:22,431 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 14:52:22,432 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 14:52:22,432 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 14:52:22,432 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 14:52:22,433 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 14:52:22,438 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 14:52:22,439 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 14:52:22,439 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 14:52:22,440 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 14:52:22,441 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 14:52:22,441 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 14:52:22,442 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 14:52:22,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 14:52:22,443 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 14:52:22,444 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 14:52:22,459 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 14:52:22,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 14:52:22,459 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 14:52:22,459 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 14:52:22,460 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 14:52:22,460 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 14:52:22,461 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 14:52:22,461 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 14:52:22,461 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 14:52:22,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 14:52:22,469 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 14:52:22,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 14:52:22,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 14:52:22,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 14:52:22,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 14:52:22,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 14:52:22,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 14:52:22,470 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 14:52:22,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 14:52:22,470 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 14:52:22,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 14:52:22,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 14:52:22,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 14:52:22,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 14:52:22,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 14:52:22,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 14:52:22,471 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 14:52:22,472 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 14:52:22,472 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 14:52:22,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 14:52:22,472 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 14:52:22,472 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 14:52:22,472 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 14:52:22,473 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 14:52:22,473 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44ef362a593e25f5681bc4a034b065cd86559bd3dd750386bca2a1f270891ccd [2021-12-14 14:52:22,697 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 14:52:22,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 14:52:22,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 14:52:22,715 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 14:52:22,716 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 14:52:22,716 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.02.cil-1.c [2021-12-14 14:52:22,766 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9313b70cd/54d5e4df0c90440894dc21362bbba4be/FLAGd85610fe2 [2021-12-14 14:52:23,137 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 14:52:23,138 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.02.cil-1.c [2021-12-14 14:52:23,155 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9313b70cd/54d5e4df0c90440894dc21362bbba4be/FLAGd85610fe2 [2021-12-14 14:52:23,528 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9313b70cd/54d5e4df0c90440894dc21362bbba4be [2021-12-14 14:52:23,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 14:52:23,532 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 14:52:23,533 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 14:52:23,533 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 14:52:23,539 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 14:52:23,540 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:52:23" (1/1) ... [2021-12-14 14:52:23,541 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@651bfd13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:23, skipping insertion in model container [2021-12-14 14:52:23,541 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:52:23" (1/1) ... [2021-12-14 14:52:23,546 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 14:52:23,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 14:52:23,687 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/systemc/token_ring.02.cil-1.c[671,684] [2021-12-14 14:52:23,741 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 14:52:23,747 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 14:52:23,759 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/systemc/token_ring.02.cil-1.c[671,684] [2021-12-14 14:52:23,786 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 14:52:23,801 INFO L208 MainTranslator]: Completed translation [2021-12-14 14:52:23,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:23 WrapperNode [2021-12-14 14:52:23,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 14:52:23,803 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 14:52:23,803 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 14:52:23,803 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 14:52:23,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:23" (1/1) ... [2021-12-14 14:52:23,812 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:23" (1/1) ... [2021-12-14 14:52:23,828 INFO L137 Inliner]: procedures = 32, calls = 37, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 273 [2021-12-14 14:52:23,831 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 14:52:23,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 14:52:23,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 14:52:23,832 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 14:52:23,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:23" (1/1) ... [2021-12-14 14:52:23,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:23" (1/1) ... [2021-12-14 14:52:23,853 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:23" (1/1) ... [2021-12-14 14:52:23,859 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:23" (1/1) ... [2021-12-14 14:52:23,864 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:23" (1/1) ... [2021-12-14 14:52:23,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:23" (1/1) ... [2021-12-14 14:52:23,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:23" (1/1) ... [2021-12-14 14:52:23,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 14:52:23,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 14:52:23,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 14:52:23,887 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 14:52:23,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:23" (1/1) ... [2021-12-14 14:52:23,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 14:52:23,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:52:23,917 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 14:52:23,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 14:52:23,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 14:52:23,945 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-14 14:52:23,945 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-14 14:52:23,945 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-14 14:52:23,945 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-14 14:52:23,945 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-14 14:52:23,945 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-14 14:52:23,946 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-14 14:52:23,946 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-14 14:52:23,946 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-14 14:52:23,947 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-14 14:52:23,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 14:52:23,947 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-14 14:52:23,947 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-14 14:52:23,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 14:52:23,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 14:52:24,023 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 14:52:24,025 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 14:52:24,311 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 14:52:24,318 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 14:52:24,318 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-14 14:52:24,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:52:24 BoogieIcfgContainer [2021-12-14 14:52:24,321 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 14:52:24,322 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 14:52:24,323 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 14:52:24,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 14:52:24,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:52:23" (1/3) ... [2021-12-14 14:52:24,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d8f9587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:52:24, skipping insertion in model container [2021-12-14 14:52:24,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:23" (2/3) ... [2021-12-14 14:52:24,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d8f9587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:52:24, skipping insertion in model container [2021-12-14 14:52:24,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:52:24" (3/3) ... [2021-12-14 14:52:24,329 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.02.cil-1.c [2021-12-14 14:52:24,332 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 14:52:24,332 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 14:52:24,362 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 14:52:24,367 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 14:52:24,367 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 14:52:24,379 INFO L276 IsEmpty]: Start isEmpty. Operand has 132 states, 108 states have (on average 1.5648148148148149) internal successors, (169), 110 states have internal predecessors, (169), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-14 14:52:24,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-14 14:52:24,385 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:24,386 INFO L514 BasicCegarLoop]: 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] [2021-12-14 14:52:24,386 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:24,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:24,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1341411477, now seen corresponding path program 1 times [2021-12-14 14:52:24,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:24,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19283342] [2021-12-14 14:52:24,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:24,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:24,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:24,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:52:24,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:24,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 14:52:24,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:24,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:52:24,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:24,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:52:24,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:24,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 14:52:24,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:24,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:52:24,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:24,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19283342] [2021-12-14 14:52:24,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19283342] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:24,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:52:24,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 14:52:24,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599793586] [2021-12-14 14:52:24,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:24,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 14:52:24,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:24,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 14:52:24,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:52:24,707 INFO L87 Difference]: Start difference. First operand has 132 states, 108 states have (on average 1.5648148148148149) internal successors, (169), 110 states have internal predecessors, (169), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:52:25,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:25,138 INFO L93 Difference]: Finished difference Result 289 states and 448 transitions. [2021-12-14 14:52:25,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 14:52:25,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2021-12-14 14:52:25,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:25,156 INFO L225 Difference]: With dead ends: 289 [2021-12-14 14:52:25,156 INFO L226 Difference]: Without dead ends: 159 [2021-12-14 14:52:25,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:52:25,165 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 284 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:25,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 347 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 14:52:25,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-14 14:52:25,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 127. [2021-12-14 14:52:25,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 104 states have (on average 1.4615384615384615) internal successors, (152), 105 states have internal predecessors, (152), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-14 14:52:25,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 184 transitions. [2021-12-14 14:52:25,216 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 184 transitions. Word has length 67 [2021-12-14 14:52:25,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:25,217 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 184 transitions. [2021-12-14 14:52:25,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:52:25,217 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 184 transitions. [2021-12-14 14:52:25,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-14 14:52:25,220 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:25,220 INFO L514 BasicCegarLoop]: 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] [2021-12-14 14:52:25,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 14:52:25,221 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:25,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:25,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1139587543, now seen corresponding path program 1 times [2021-12-14 14:52:25,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:25,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677098307] [2021-12-14 14:52:25,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:25,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:25,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:52:25,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:25,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 14:52:25,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:25,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:52:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:25,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:52:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:25,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 14:52:25,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:25,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:52:25,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:25,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677098307] [2021-12-14 14:52:25,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677098307] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:25,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:52:25,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 14:52:25,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274651632] [2021-12-14 14:52:25,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:25,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 14:52:25,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:25,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 14:52:25,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:52:25,373 INFO L87 Difference]: Start difference. First operand 127 states and 184 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:52:25,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:25,925 INFO L93 Difference]: Finished difference Result 423 states and 631 transitions. [2021-12-14 14:52:25,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 14:52:25,926 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2021-12-14 14:52:25,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:25,929 INFO L225 Difference]: With dead ends: 423 [2021-12-14 14:52:25,929 INFO L226 Difference]: Without dead ends: 306 [2021-12-14 14:52:25,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-14 14:52:25,931 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 403 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:25,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 588 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 14:52:25,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-12-14 14:52:25,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 243. [2021-12-14 14:52:25,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 202 states have (on average 1.4752475247524752) internal successors, (298), 204 states have internal predecessors, (298), 27 states have call successors, (27), 12 states have call predecessors, (27), 13 states have return successors, (30), 27 states have call predecessors, (30), 27 states have call successors, (30) [2021-12-14 14:52:25,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 355 transitions. [2021-12-14 14:52:25,979 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 355 transitions. Word has length 67 [2021-12-14 14:52:25,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:25,980 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 355 transitions. [2021-12-14 14:52:25,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:52:25,981 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 355 transitions. [2021-12-14 14:52:25,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-14 14:52:25,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:25,984 INFO L514 BasicCegarLoop]: 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] [2021-12-14 14:52:25,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 14:52:25,985 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:25,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:25,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1628045733, now seen corresponding path program 1 times [2021-12-14 14:52:25,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:25,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384154340] [2021-12-14 14:52:25,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:25,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:26,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:52:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:26,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 14:52:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:26,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:52:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:26,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:52:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:26,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 14:52:26,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:26,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:52:26,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:26,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384154340] [2021-12-14 14:52:26,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384154340] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:26,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:52:26,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:52:26,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424996507] [2021-12-14 14:52:26,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:26,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:52:26,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:26,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:52:26,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:52:26,109 INFO L87 Difference]: Start difference. First operand 243 states and 355 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:52:26,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:26,774 INFO L93 Difference]: Finished difference Result 686 states and 1015 transitions. [2021-12-14 14:52:26,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:52:26,774 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2021-12-14 14:52:26,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:26,777 INFO L225 Difference]: With dead ends: 686 [2021-12-14 14:52:26,778 INFO L226 Difference]: Without dead ends: 453 [2021-12-14 14:52:26,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:52:26,780 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 393 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:26,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 916 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 14:52:26,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-12-14 14:52:26,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 352. [2021-12-14 14:52:26,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 293 states have (on average 1.4675767918088738) internal successors, (430), 296 states have internal predecessors, (430), 38 states have call successors, (38), 18 states have call predecessors, (38), 20 states have return successors, (43), 39 states have call predecessors, (43), 38 states have call successors, (43) [2021-12-14 14:52:26,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 511 transitions. [2021-12-14 14:52:26,826 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 511 transitions. Word has length 67 [2021-12-14 14:52:26,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:26,827 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 511 transitions. [2021-12-14 14:52:26,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:52:26,827 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 511 transitions. [2021-12-14 14:52:26,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-14 14:52:26,830 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:26,830 INFO L514 BasicCegarLoop]: 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] [2021-12-14 14:52:26,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 14:52:26,830 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:26,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:26,831 INFO L85 PathProgramCache]: Analyzing trace with hash -752026727, now seen corresponding path program 1 times [2021-12-14 14:52:26,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:26,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071769301] [2021-12-14 14:52:26,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:26,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:26,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:26,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:52:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:26,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 14:52:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:26,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:52:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:26,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:52:26,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:26,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 14:52:26,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:52:26,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:26,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071769301] [2021-12-14 14:52:26,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071769301] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:26,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:52:26,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:52:26,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216062323] [2021-12-14 14:52:26,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:26,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:52:26,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:26,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:52:26,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:52:26,922 INFO L87 Difference]: Start difference. First operand 352 states and 511 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:52:27,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:27,547 INFO L93 Difference]: Finished difference Result 1072 states and 1579 transitions. [2021-12-14 14:52:27,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:52:27,548 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2021-12-14 14:52:27,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:27,551 INFO L225 Difference]: With dead ends: 1072 [2021-12-14 14:52:27,551 INFO L226 Difference]: Without dead ends: 730 [2021-12-14 14:52:27,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:52:27,553 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 425 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:27,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 654 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 14:52:27,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-12-14 14:52:27,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 571. [2021-12-14 14:52:27,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 476 states have (on average 1.4600840336134453) internal successors, (695), 481 states have internal predecessors, (695), 60 states have call successors, (60), 30 states have call predecessors, (60), 34 states have return successors, (73), 63 states have call predecessors, (73), 60 states have call successors, (73) [2021-12-14 14:52:27,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 828 transitions. [2021-12-14 14:52:27,591 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 828 transitions. Word has length 67 [2021-12-14 14:52:27,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:27,591 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 828 transitions. [2021-12-14 14:52:27,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:52:27,592 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 828 transitions. [2021-12-14 14:52:27,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-14 14:52:27,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:27,593 INFO L514 BasicCegarLoop]: 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] [2021-12-14 14:52:27,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 14:52:27,593 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:27,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:27,594 INFO L85 PathProgramCache]: Analyzing trace with hash -308126053, now seen corresponding path program 1 times [2021-12-14 14:52:27,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:27,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982133366] [2021-12-14 14:52:27,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:27,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:27,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:27,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:52:27,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:27,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 14:52:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:27,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:52:27,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:27,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:52:27,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:27,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 14:52:27,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:27,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:52:27,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:27,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982133366] [2021-12-14 14:52:27,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982133366] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:27,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:52:27,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:52:27,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260460201] [2021-12-14 14:52:27,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:27,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:52:27,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:27,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:52:27,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:52:27,656 INFO L87 Difference]: Start difference. First operand 571 states and 828 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:52:28,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:28,367 INFO L93 Difference]: Finished difference Result 1916 states and 2810 transitions. [2021-12-14 14:52:28,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 14:52:28,368 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2021-12-14 14:52:28,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:28,374 INFO L225 Difference]: With dead ends: 1916 [2021-12-14 14:52:28,375 INFO L226 Difference]: Without dead ends: 1355 [2021-12-14 14:52:28,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 14:52:28,377 INFO L933 BasicCegarLoop]: 296 mSDtfsCounter, 399 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 910 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:28,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 910 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 14:52:28,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-12-14 14:52:28,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 983. [2021-12-14 14:52:28,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 820 states have (on average 1.4573170731707317) internal successors, (1195), 829 states have internal predecessors, (1195), 100 states have call successors, (100), 54 states have call predecessors, (100), 62 states have return successors, (135), 107 states have call predecessors, (135), 100 states have call successors, (135) [2021-12-14 14:52:28,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 1430 transitions. [2021-12-14 14:52:28,423 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 1430 transitions. Word has length 67 [2021-12-14 14:52:28,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:28,424 INFO L470 AbstractCegarLoop]: Abstraction has 983 states and 1430 transitions. [2021-12-14 14:52:28,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:52:28,424 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 1430 transitions. [2021-12-14 14:52:28,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-14 14:52:28,426 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:28,426 INFO L514 BasicCegarLoop]: 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] [2021-12-14 14:52:28,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 14:52:28,426 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:28,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:28,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1958255133, now seen corresponding path program 1 times [2021-12-14 14:52:28,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:28,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869179445] [2021-12-14 14:52:28,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:28,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:28,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:28,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:52:28,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:28,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 14:52:28,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:28,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:52:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:28,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:52:28,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:28,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 14:52:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:28,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:52:28,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:28,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869179445] [2021-12-14 14:52:28,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869179445] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:28,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:52:28,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:52:28,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183834145] [2021-12-14 14:52:28,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:28,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:52:28,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:28,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:52:28,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:52:28,489 INFO L87 Difference]: Start difference. First operand 983 states and 1430 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:52:29,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:29,114 INFO L93 Difference]: Finished difference Result 3314 states and 4850 transitions. [2021-12-14 14:52:29,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 14:52:29,114 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2021-12-14 14:52:29,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:29,123 INFO L225 Difference]: With dead ends: 3314 [2021-12-14 14:52:29,124 INFO L226 Difference]: Without dead ends: 2341 [2021-12-14 14:52:29,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 14:52:29,127 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 404 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:29,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 882 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 14:52:29,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2341 states. [2021-12-14 14:52:29,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2341 to 1820. [2021-12-14 14:52:29,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1525 states have (on average 1.459016393442623) internal successors, (2225), 1542 states have internal predecessors, (2225), 176 states have call successors, (176), 102 states have call predecessors, (176), 118 states have return successors, (273), 191 states have call predecessors, (273), 176 states have call successors, (273) [2021-12-14 14:52:29,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 2674 transitions. [2021-12-14 14:52:29,205 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 2674 transitions. Word has length 67 [2021-12-14 14:52:29,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:29,205 INFO L470 AbstractCegarLoop]: Abstraction has 1820 states and 2674 transitions. [2021-12-14 14:52:29,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:52:29,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 2674 transitions. [2021-12-14 14:52:29,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-14 14:52:29,207 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:29,208 INFO L514 BasicCegarLoop]: 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] [2021-12-14 14:52:29,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 14:52:29,208 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:29,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:29,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1477174875, now seen corresponding path program 1 times [2021-12-14 14:52:29,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:29,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720239810] [2021-12-14 14:52:29,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:29,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:29,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:52:29,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:29,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 14:52:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:29,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:52:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:29,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:52:29,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:29,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 14:52:29,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:29,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:52:29,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:29,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720239810] [2021-12-14 14:52:29,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720239810] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:29,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:52:29,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 14:52:29,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679825897] [2021-12-14 14:52:29,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:29,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 14:52:29,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:29,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 14:52:29,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:52:29,259 INFO L87 Difference]: Start difference. First operand 1820 states and 2674 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:52:29,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:29,866 INFO L93 Difference]: Finished difference Result 5157 states and 7617 transitions. [2021-12-14 14:52:29,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 14:52:29,867 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2021-12-14 14:52:29,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:29,878 INFO L225 Difference]: With dead ends: 5157 [2021-12-14 14:52:29,879 INFO L226 Difference]: Without dead ends: 3348 [2021-12-14 14:52:29,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-14 14:52:29,884 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 527 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:29,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [552 Valid, 722 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 14:52:29,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3348 states. [2021-12-14 14:52:29,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3348 to 2761. [2021-12-14 14:52:29,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2761 states, 2308 states have (on average 1.441941074523397) internal successors, (3328), 2342 states have internal predecessors, (3328), 272 states have call successors, (272), 156 states have call predecessors, (272), 180 states have return successors, (397), 278 states have call predecessors, (397), 272 states have call successors, (397) [2021-12-14 14:52:29,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2761 states to 2761 states and 3997 transitions. [2021-12-14 14:52:29,972 INFO L78 Accepts]: Start accepts. Automaton has 2761 states and 3997 transitions. Word has length 67 [2021-12-14 14:52:29,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:29,972 INFO L470 AbstractCegarLoop]: Abstraction has 2761 states and 3997 transitions. [2021-12-14 14:52:29,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:52:29,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2761 states and 3997 transitions. [2021-12-14 14:52:29,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-14 14:52:29,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:29,978 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-14 14:52:29,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 14:52:29,978 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:29,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:29,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1191841586, now seen corresponding path program 1 times [2021-12-14 14:52:29,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:29,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815220104] [2021-12-14 14:52:29,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:29,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:29,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:52:29,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:30,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 14:52:30,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:30,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:52:30,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:30,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:52:30,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:30,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 14:52:30,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:30,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 14:52:30,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:30,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:52:30,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:30,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-14 14:52:30,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:30,110 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 14:52:30,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:30,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815220104] [2021-12-14 14:52:30,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815220104] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:52:30,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395239949] [2021-12-14 14:52:30,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:30,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:30,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:52:30,122 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:52:30,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 14:52:30,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:30,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 14:52:30,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:52:30,422 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 14:52:30,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:52:30,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395239949] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:30,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:52:30,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-14 14:52:30,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724265958] [2021-12-14 14:52:30,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:30,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:52:30,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:30,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:52:30,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:52:30,424 INFO L87 Difference]: Start difference. First operand 2761 states and 3997 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 14:52:30,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:30,589 INFO L93 Difference]: Finished difference Result 8118 states and 11831 transitions. [2021-12-14 14:52:30,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:52:30,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2021-12-14 14:52:30,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:30,611 INFO L225 Difference]: With dead ends: 8118 [2021-12-14 14:52:30,611 INFO L226 Difference]: Without dead ends: 5368 [2021-12-14 14:52:30,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:52:30,620 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 140 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:30,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 350 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:52:30,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5368 states. [2021-12-14 14:52:30,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5368 to 5314. [2021-12-14 14:52:30,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5314 states, 4447 states have (on average 1.440746570721835) internal successors, (6407), 4514 states have internal predecessors, (6407), 510 states have call successors, (510), 308 states have call predecessors, (510), 356 states have return successors, (745), 507 states have call predecessors, (745), 510 states have call successors, (745) [2021-12-14 14:52:30,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5314 states to 5314 states and 7662 transitions. [2021-12-14 14:52:30,835 INFO L78 Accepts]: Start accepts. Automaton has 5314 states and 7662 transitions. Word has length 109 [2021-12-14 14:52:30,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:30,835 INFO L470 AbstractCegarLoop]: Abstraction has 5314 states and 7662 transitions. [2021-12-14 14:52:30,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 14:52:30,835 INFO L276 IsEmpty]: Start isEmpty. Operand 5314 states and 7662 transitions. [2021-12-14 14:52:30,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-14 14:52:30,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:30,843 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-14 14:52:30,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 14:52:31,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:31,060 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:31,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:31,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1024502098, now seen corresponding path program 1 times [2021-12-14 14:52:31,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:31,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219420216] [2021-12-14 14:52:31,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:31,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:31,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:31,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:52:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:31,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 14:52:31,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:31,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:52:31,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:31,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:52:31,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:31,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 14:52:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:31,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 14:52:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:31,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:52:31,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:31,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-14 14:52:31,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:31,145 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 14:52:31,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:31,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219420216] [2021-12-14 14:52:31,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219420216] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:52:31,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025005392] [2021-12-14 14:52:31,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:31,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:31,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:52:31,147 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:52:31,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 14:52:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:31,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 14:52:31,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:52:31,334 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-14 14:52:31,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:52:31,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025005392] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:31,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:52:31,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 14:52:31,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822817947] [2021-12-14 14:52:31,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:31,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:52:31,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:31,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:52:31,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:52:31,336 INFO L87 Difference]: Start difference. First operand 5314 states and 7662 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 14:52:31,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:31,506 INFO L93 Difference]: Finished difference Result 8992 states and 13074 transitions. [2021-12-14 14:52:31,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:52:31,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 109 [2021-12-14 14:52:31,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:31,536 INFO L225 Difference]: With dead ends: 8992 [2021-12-14 14:52:31,536 INFO L226 Difference]: Without dead ends: 7065 [2021-12-14 14:52:31,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:52:31,545 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 143 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:31,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 511 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:52:31,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7065 states. [2021-12-14 14:52:31,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7065 to 7065. [2021-12-14 14:52:31,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7065 states, 5917 states have (on average 1.4402568869359473) internal successors, (8522), 6000 states have internal predecessors, (8522), 671 states have call successors, (671), 412 states have call predecessors, (671), 476 states have return successors, (1015), 668 states have call predecessors, (1015), 671 states have call successors, (1015) [2021-12-14 14:52:31,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7065 states to 7065 states and 10208 transitions. [2021-12-14 14:52:31,793 INFO L78 Accepts]: Start accepts. Automaton has 7065 states and 10208 transitions. Word has length 109 [2021-12-14 14:52:31,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:31,793 INFO L470 AbstractCegarLoop]: Abstraction has 7065 states and 10208 transitions. [2021-12-14 14:52:31,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 14:52:31,794 INFO L276 IsEmpty]: Start isEmpty. Operand 7065 states and 10208 transitions. [2021-12-14 14:52:31,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-14 14:52:31,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:31,806 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2021-12-14 14:52:31,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 14:52:32,019 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,SelfDestructingSolverStorable8 [2021-12-14 14:52:32,019 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:32,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:32,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1008937151, now seen corresponding path program 1 times [2021-12-14 14:52:32,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:32,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325475264] [2021-12-14 14:52:32,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:32,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:32,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:32,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:52:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:32,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 14:52:32,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:32,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:52:32,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:32,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:52:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:32,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 14:52:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:32,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 14:52:32,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:32,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:52:32,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:32,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-14 14:52:32,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:32,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:52:32,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:32,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-14 14:52:32,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:32,092 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-14 14:52:32,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:32,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325475264] [2021-12-14 14:52:32,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325475264] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:52:32,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142632478] [2021-12-14 14:52:32,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:32,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:32,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:52:32,100 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:52:32,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 14:52:32,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:32,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 14:52:32,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:52:32,392 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-14 14:52:32,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:52:32,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142632478] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:32,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:52:32,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-14 14:52:32,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631850383] [2021-12-14 14:52:32,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:32,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:52:32,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:32,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:52:32,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:52:32,393 INFO L87 Difference]: Start difference. First operand 7065 states and 10208 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 14:52:32,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:32,719 INFO L93 Difference]: Finished difference Result 20891 states and 30410 transitions. [2021-12-14 14:52:32,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:52:32,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 141 [2021-12-14 14:52:32,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:32,776 INFO L225 Difference]: With dead ends: 20891 [2021-12-14 14:52:32,776 INFO L226 Difference]: Without dead ends: 13837 [2021-12-14 14:52:32,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:52:32,800 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 98 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:32,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 359 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:52:32,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13837 states. [2021-12-14 14:52:33,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13837 to 13695. [2021-12-14 14:52:33,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13695 states, 11460 states have (on average 1.4361256544502619) internal successors, (16458), 11625 states have internal predecessors, (16458), 1291 states have call successors, (1291), 815 states have call predecessors, (1291), 943 states have return successors, (1949), 1270 states have call predecessors, (1949), 1291 states have call successors, (1949) [2021-12-14 14:52:33,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13695 states to 13695 states and 19698 transitions. [2021-12-14 14:52:33,274 INFO L78 Accepts]: Start accepts. Automaton has 13695 states and 19698 transitions. Word has length 141 [2021-12-14 14:52:33,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:33,276 INFO L470 AbstractCegarLoop]: Abstraction has 13695 states and 19698 transitions. [2021-12-14 14:52:33,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 14:52:33,277 INFO L276 IsEmpty]: Start isEmpty. Operand 13695 states and 19698 transitions. [2021-12-14 14:52:33,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-14 14:52:33,305 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:33,305 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-14 14:52:33,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 14:52:33,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:33,538 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:33,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:33,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1723827082, now seen corresponding path program 1 times [2021-12-14 14:52:33,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:33,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512101461] [2021-12-14 14:52:33,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:33,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:33,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:33,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:52:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:33,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 14:52:33,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:33,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:52:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:33,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:52:33,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:33,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 14:52:33,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:33,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-14 14:52:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:33,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 14:52:33,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:33,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:52:33,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:33,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 14:52:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:33,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:52:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:33,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-14 14:52:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:33,630 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-14 14:52:33,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:33,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512101461] [2021-12-14 14:52:33,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512101461] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:52:33,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063175439] [2021-12-14 14:52:33,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:33,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:33,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:52:33,631 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:52:33,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 14:52:33,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:33,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 14:52:33,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:52:33,970 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 14:52:33,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:52:33,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063175439] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:33,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:52:33,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 14:52:33,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52045302] [2021-12-14 14:52:33,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:33,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:52:33,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:33,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:52:33,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:52:33,973 INFO L87 Difference]: Start difference. First operand 13695 states and 19698 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 14:52:34,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:34,416 INFO L93 Difference]: Finished difference Result 29008 states and 42364 transitions. [2021-12-14 14:52:34,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:52:34,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 158 [2021-12-14 14:52:34,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:34,463 INFO L225 Difference]: With dead ends: 29008 [2021-12-14 14:52:34,463 INFO L226 Difference]: Without dead ends: 15323 [2021-12-14 14:52:34,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:52:34,498 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 116 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:34,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 212 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:52:34,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15323 states. [2021-12-14 14:52:34,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15323 to 15323. [2021-12-14 14:52:34,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15323 states, 12928 states have (on average 1.3779393564356435) internal successors, (17814), 13093 states have internal predecessors, (17814), 1336 states have call successors, (1336), 930 states have call predecessors, (1336), 1058 states have return successors, (1999), 1315 states have call predecessors, (1999), 1336 states have call successors, (1999) [2021-12-14 14:52:35,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15323 states to 15323 states and 21149 transitions. [2021-12-14 14:52:35,015 INFO L78 Accepts]: Start accepts. Automaton has 15323 states and 21149 transitions. Word has length 158 [2021-12-14 14:52:35,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:35,016 INFO L470 AbstractCegarLoop]: Abstraction has 15323 states and 21149 transitions. [2021-12-14 14:52:35,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 14:52:35,016 INFO L276 IsEmpty]: Start isEmpty. Operand 15323 states and 21149 transitions. [2021-12-14 14:52:35,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-14 14:52:35,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:35,044 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-14 14:52:35,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-14 14:52:35,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:35,263 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:35,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:35,264 INFO L85 PathProgramCache]: Analyzing trace with hash -481856839, now seen corresponding path program 1 times [2021-12-14 14:52:35,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:35,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175075008] [2021-12-14 14:52:35,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:35,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:35,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:35,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:52:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:35,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 14:52:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:35,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:52:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:35,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:52:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:35,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 14:52:35,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:35,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-14 14:52:35,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:35,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 14:52:35,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:35,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:52:35,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:35,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 14:52:35,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:35,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:52:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:35,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-14 14:52:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:35,344 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-14 14:52:35,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:35,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175075008] [2021-12-14 14:52:35,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175075008] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:52:35,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365357044] [2021-12-14 14:52:35,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:35,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:35,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:52:35,345 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:52:35,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 14:52:35,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:35,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 14:52:35,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:52:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-14 14:52:35,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:52:35,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365357044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:35,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:52:35,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 14:52:35,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735278597] [2021-12-14 14:52:35,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:35,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:52:35,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:35,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:52:35,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:52:35,627 INFO L87 Difference]: Start difference. First operand 15323 states and 21149 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 14:52:36,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:36,057 INFO L93 Difference]: Finished difference Result 32174 states and 44325 transitions. [2021-12-14 14:52:36,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:52:36,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 158 [2021-12-14 14:52:36,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:36,112 INFO L225 Difference]: With dead ends: 32174 [2021-12-14 14:52:36,112 INFO L226 Difference]: Without dead ends: 16863 [2021-12-14 14:52:36,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:52:36,139 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 130 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:36,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 350 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:52:36,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16863 states. [2021-12-14 14:52:36,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16863 to 16723. [2021-12-14 14:52:36,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16723 states, 14216 states have (on average 1.342290377039955) internal successors, (19082), 14381 states have internal predecessors, (19082), 1356 states have call successors, (1356), 1022 states have call predecessors, (1356), 1150 states have return successors, (2111), 1335 states have call predecessors, (2111), 1356 states have call successors, (2111) [2021-12-14 14:52:36,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16723 states to 16723 states and 22549 transitions. [2021-12-14 14:52:36,827 INFO L78 Accepts]: Start accepts. Automaton has 16723 states and 22549 transitions. Word has length 158 [2021-12-14 14:52:36,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:36,827 INFO L470 AbstractCegarLoop]: Abstraction has 16723 states and 22549 transitions. [2021-12-14 14:52:36,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 14:52:36,828 INFO L276 IsEmpty]: Start isEmpty. Operand 16723 states and 22549 transitions. [2021-12-14 14:52:36,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-14 14:52:36,857 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:36,857 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-14 14:52:36,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 14:52:37,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-14 14:52:37,074 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:37,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:37,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1737479545, now seen corresponding path program 1 times [2021-12-14 14:52:37,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:37,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430371624] [2021-12-14 14:52:37,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:37,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:37,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:52:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:37,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 14:52:37,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:37,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:52:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:37,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:52:37,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:37,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 14:52:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:37,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 14:52:37,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:37,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-14 14:52:37,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:37,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:52:37,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:37,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-14 14:52:37,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:37,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:52:37,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:37,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-14 14:52:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:37,177 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-14 14:52:37,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:37,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430371624] [2021-12-14 14:52:37,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430371624] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:52:37,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795966624] [2021-12-14 14:52:37,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:37,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:37,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:52:37,179 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:52:37,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 14:52:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:37,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 14:52:37,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:52:37,489 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-14 14:52:37,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:52:37,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795966624] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:37,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:52:37,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 14:52:37,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050631952] [2021-12-14 14:52:37,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:37,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:52:37,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:37,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:52:37,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:52:37,491 INFO L87 Difference]: Start difference. First operand 16723 states and 22549 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 14:52:38,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:38,173 INFO L93 Difference]: Finished difference Result 48048 states and 65401 transitions. [2021-12-14 14:52:38,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:52:38,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 159 [2021-12-14 14:52:38,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:38,269 INFO L225 Difference]: With dead ends: 48048 [2021-12-14 14:52:38,269 INFO L226 Difference]: Without dead ends: 31337 [2021-12-14 14:52:38,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:52:38,309 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 142 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:38,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 380 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:52:38,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31337 states. [2021-12-14 14:52:39,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31337 to 30845. [2021-12-14 14:52:39,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30845 states, 26113 states have (on average 1.333626929115766) internal successors, (34825), 26443 states have internal predecessors, (34825), 2571 states have call successors, (2571), 1904 states have call predecessors, (2571), 2160 states have return successors, (4678), 2529 states have call predecessors, (4678), 2571 states have call successors, (4678) [2021-12-14 14:52:39,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30845 states to 30845 states and 42074 transitions. [2021-12-14 14:52:39,364 INFO L78 Accepts]: Start accepts. Automaton has 30845 states and 42074 transitions. Word has length 159 [2021-12-14 14:52:39,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:39,364 INFO L470 AbstractCegarLoop]: Abstraction has 30845 states and 42074 transitions. [2021-12-14 14:52:39,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 14:52:39,364 INFO L276 IsEmpty]: Start isEmpty. Operand 30845 states and 42074 transitions. [2021-12-14 14:52:39,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-14 14:52:39,405 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:39,405 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2021-12-14 14:52:39,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 14:52:39,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:39,619 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:39,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:39,620 INFO L85 PathProgramCache]: Analyzing trace with hash 2130014702, now seen corresponding path program 1 times [2021-12-14 14:52:39,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:39,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081948702] [2021-12-14 14:52:39,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:39,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:39,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:39,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:52:39,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:39,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 14:52:39,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:39,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:52:39,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:39,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:52:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:39,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 14:52:39,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:39,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 14:52:39,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:39,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-14 14:52:39,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:39,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:52:39,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:39,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-14 14:52:39,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:39,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:52:39,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:39,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-14 14:52:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:39,698 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-14 14:52:39,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:39,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081948702] [2021-12-14 14:52:39,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081948702] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:52:39,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228110901] [2021-12-14 14:52:39,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:39,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:39,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:52:39,699 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:52:39,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 14:52:39,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:39,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 14:52:39,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:52:39,933 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 14:52:39,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:52:39,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228110901] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:39,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:52:39,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 14:52:39,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703071781] [2021-12-14 14:52:39,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:39,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:52:39,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:39,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:52:39,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:52:39,935 INFO L87 Difference]: Start difference. First operand 30845 states and 42074 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 14:52:40,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:40,747 INFO L93 Difference]: Finished difference Result 51820 states and 71648 transitions. [2021-12-14 14:52:40,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:52:40,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 159 [2021-12-14 14:52:40,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:40,827 INFO L225 Difference]: With dead ends: 51820 [2021-12-14 14:52:40,827 INFO L226 Difference]: Without dead ends: 27303 [2021-12-14 14:52:40,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:52:40,874 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 130 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:40,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 210 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:52:40,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27303 states. [2021-12-14 14:52:41,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27303 to 19855. [2021-12-14 14:52:41,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19855 states, 16907 states have (on average 1.2918909327497485) internal successors, (21842), 17081 states have internal predecessors, (21842), 1589 states have call successors, (1589), 1230 states have call predecessors, (1589), 1358 states have return successors, (2580), 1559 states have call predecessors, (2580), 1589 states have call successors, (2580) [2021-12-14 14:52:42,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19855 states to 19855 states and 26011 transitions. [2021-12-14 14:52:42,023 INFO L78 Accepts]: Start accepts. Automaton has 19855 states and 26011 transitions. Word has length 159 [2021-12-14 14:52:42,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:42,024 INFO L470 AbstractCegarLoop]: Abstraction has 19855 states and 26011 transitions. [2021-12-14 14:52:42,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 14:52:42,024 INFO L276 IsEmpty]: Start isEmpty. Operand 19855 states and 26011 transitions. [2021-12-14 14:52:42,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-14 14:52:42,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:42,047 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-14 14:52:42,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 14:52:42,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:42,267 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:42,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:42,268 INFO L85 PathProgramCache]: Analyzing trace with hash 386447850, now seen corresponding path program 1 times [2021-12-14 14:52:42,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:42,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294790270] [2021-12-14 14:52:42,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:42,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:42,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:42,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:52:42,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:42,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 14:52:42,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:42,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:52:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:42,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:52:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:42,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 14:52:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:42,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 14:52:42,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:42,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-14 14:52:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:42,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:52:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:42,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-14 14:52:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:42,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:52:42,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:42,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-14 14:52:42,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:42,441 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-14 14:52:42,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:42,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294790270] [2021-12-14 14:52:42,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294790270] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:52:42,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774378303] [2021-12-14 14:52:42,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:42,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:42,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:52:42,442 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:52:42,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 14:52:42,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:42,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 14:52:42,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:52:42,666 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-14 14:52:42,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:52:42,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774378303] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:42,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:52:42,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 14:52:42,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629068802] [2021-12-14 14:52:42,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:42,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:52:42,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:42,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:52:42,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:52:42,668 INFO L87 Difference]: Start difference. First operand 19855 states and 26011 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 14:52:43,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:43,572 INFO L93 Difference]: Finished difference Result 57698 states and 76509 transitions. [2021-12-14 14:52:43,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:52:43,573 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 159 [2021-12-14 14:52:43,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:43,674 INFO L225 Difference]: With dead ends: 57698 [2021-12-14 14:52:43,674 INFO L226 Difference]: Without dead ends: 37859 [2021-12-14 14:52:43,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:52:43,709 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 138 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:43,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 384 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:52:43,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37859 states. [2021-12-14 14:52:44,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37859 to 36831. [2021-12-14 14:52:44,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36831 states, 31241 states have (on average 1.2801126724496654) internal successors, (39992), 31589 states have internal predecessors, (39992), 3025 states have call successors, (3025), 2308 states have call predecessors, (3025), 2564 states have return successors, (5800), 2965 states have call predecessors, (5800), 3025 states have call successors, (5800) [2021-12-14 14:52:45,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36831 states to 36831 states and 48817 transitions. [2021-12-14 14:52:45,084 INFO L78 Accepts]: Start accepts. Automaton has 36831 states and 48817 transitions. Word has length 159 [2021-12-14 14:52:45,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:45,085 INFO L470 AbstractCegarLoop]: Abstraction has 36831 states and 48817 transitions. [2021-12-14 14:52:45,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 14:52:45,085 INFO L276 IsEmpty]: Start isEmpty. Operand 36831 states and 48817 transitions. [2021-12-14 14:52:45,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-14 14:52:45,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:45,139 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-14 14:52:45,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 14:52:45,366 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,SelfDestructingSolverStorable14 [2021-12-14 14:52:45,366 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:45,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:45,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1954938935, now seen corresponding path program 1 times [2021-12-14 14:52:45,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:45,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762836868] [2021-12-14 14:52:45,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:45,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:45,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:45,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:52:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:45,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 14:52:45,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:45,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:52:45,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:45,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:52:45,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:45,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 14:52:45,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:45,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 14:52:45,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:45,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-14 14:52:45,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:45,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:52:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:45,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-14 14:52:45,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:45,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:52:45,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:45,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-14 14:52:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-14 14:52:45,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:45,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762836868] [2021-12-14 14:52:45,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762836868] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:45,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:52:45,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 14:52:45,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572113723] [2021-12-14 14:52:45,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:45,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 14:52:45,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:45,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 14:52:45,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:52:45,439 INFO L87 Difference]: Start difference. First operand 36831 states and 48817 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 14:52:46,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:46,839 INFO L93 Difference]: Finished difference Result 72910 states and 95695 transitions. [2021-12-14 14:52:46,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 14:52:46,839 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 159 [2021-12-14 14:52:46,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:46,940 INFO L225 Difference]: With dead ends: 72910 [2021-12-14 14:52:46,940 INFO L226 Difference]: Without dead ends: 36094 [2021-12-14 14:52:47,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:52:47,003 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 281 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:47,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 310 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 14:52:47,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36094 states. [2021-12-14 14:52:48,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36094 to 33356. [2021-12-14 14:52:48,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33356 states, 28538 states have (on average 1.2772443759198262) internal successors, (36450), 29175 states have internal predecessors, (36450), 2307 states have call successors, (2307), 1772 states have call predecessors, (2307), 2510 states have return successors, (4765), 2424 states have call predecessors, (4765), 2307 states have call successors, (4765) [2021-12-14 14:52:48,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33356 states to 33356 states and 43522 transitions. [2021-12-14 14:52:48,485 INFO L78 Accepts]: Start accepts. Automaton has 33356 states and 43522 transitions. Word has length 159 [2021-12-14 14:52:48,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:48,486 INFO L470 AbstractCegarLoop]: Abstraction has 33356 states and 43522 transitions. [2021-12-14 14:52:48,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 14:52:48,486 INFO L276 IsEmpty]: Start isEmpty. Operand 33356 states and 43522 transitions. [2021-12-14 14:52:48,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-14 14:52:48,527 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:48,527 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-14 14:52:48,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 14:52:48,527 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:48,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:48,528 INFO L85 PathProgramCache]: Analyzing trace with hash 2077795372, now seen corresponding path program 1 times [2021-12-14 14:52:48,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:48,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984382241] [2021-12-14 14:52:48,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:48,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:48,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:48,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:52:48,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:48,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 14:52:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:48,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:52:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:48,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:52:48,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:48,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 14:52:48,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:48,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 14:52:48,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:48,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-14 14:52:48,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:48,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:52:48,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:48,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-14 14:52:48,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:48,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:52:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:48,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-14 14:52:48,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:48,588 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-14 14:52:48,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:48,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984382241] [2021-12-14 14:52:48,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984382241] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:48,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:52:48,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 14:52:48,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065995882] [2021-12-14 14:52:48,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:48,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 14:52:48,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:48,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 14:52:48,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:52:48,590 INFO L87 Difference]: Start difference. First operand 33356 states and 43522 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 14:52:49,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:49,763 INFO L93 Difference]: Finished difference Result 60854 states and 79171 transitions. [2021-12-14 14:52:49,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 14:52:49,764 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 159 [2021-12-14 14:52:49,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:49,838 INFO L225 Difference]: With dead ends: 60854 [2021-12-14 14:52:49,838 INFO L226 Difference]: Without dead ends: 27509 [2021-12-14 14:52:49,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:52:49,896 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 281 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:49,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 308 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 14:52:49,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27509 states. [2021-12-14 14:52:50,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27509 to 24900. [2021-12-14 14:52:50,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24900 states, 21348 states have (on average 1.2856005246393105) internal successors, (27445), 21794 states have internal predecessors, (27445), 1717 states have call successors, (1717), 1326 states have call predecessors, (1717), 1834 states have return successors, (3303), 1787 states have call predecessors, (3303), 1717 states have call successors, (3303) [2021-12-14 14:52:51,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24900 states to 24900 states and 32465 transitions. [2021-12-14 14:52:51,028 INFO L78 Accepts]: Start accepts. Automaton has 24900 states and 32465 transitions. Word has length 159 [2021-12-14 14:52:51,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:51,029 INFO L470 AbstractCegarLoop]: Abstraction has 24900 states and 32465 transitions. [2021-12-14 14:52:51,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 14:52:51,029 INFO L276 IsEmpty]: Start isEmpty. Operand 24900 states and 32465 transitions. [2021-12-14 14:52:51,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-14 14:52:51,059 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:51,059 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-14 14:52:51,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 14:52:51,059 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:51,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:51,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1097089037, now seen corresponding path program 1 times [2021-12-14 14:52:51,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:51,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533532346] [2021-12-14 14:52:51,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:51,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:51,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:51,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:52:51,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:51,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 14:52:51,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:51,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:52:51,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:51,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:52:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:51,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 14:52:51,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:51,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 14:52:51,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:51,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 14:52:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:51,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:52:51,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:51,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-14 14:52:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:51,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:52:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:51,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-14 14:52:51,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:51,155 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-14 14:52:51,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:51,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533532346] [2021-12-14 14:52:51,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533532346] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:52:51,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919983069] [2021-12-14 14:52:51,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:51,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:51,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:52:51,157 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:52:51,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 14:52:51,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:51,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 14:52:51,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:52:51,373 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 14:52:51,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:52:51,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919983069] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:51,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:52:51,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 14:52:51,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681038336] [2021-12-14 14:52:51,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:51,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:52:51,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:51,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:52:51,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:52:51,375 INFO L87 Difference]: Start difference. First operand 24900 states and 32465 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 14:52:52,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:52,173 INFO L93 Difference]: Finished difference Result 41871 states and 56180 transitions. [2021-12-14 14:52:52,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:52:52,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 161 [2021-12-14 14:52:52,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:52,231 INFO L225 Difference]: With dead ends: 41871 [2021-12-14 14:52:52,231 INFO L226 Difference]: Without dead ends: 25016 [2021-12-14 14:52:52,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:52:52,261 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 130 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:52,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 464 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:52:52,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25016 states. [2021-12-14 14:52:53,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25016 to 24900. [2021-12-14 14:52:53,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24900 states, 21348 states have (on average 1.2620854412591342) internal successors, (26943), 21794 states have internal predecessors, (26943), 1717 states have call successors, (1717), 1326 states have call predecessors, (1717), 1834 states have return successors, (3303), 1787 states have call predecessors, (3303), 1717 states have call successors, (3303) [2021-12-14 14:52:53,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24900 states to 24900 states and 31963 transitions. [2021-12-14 14:52:53,093 INFO L78 Accepts]: Start accepts. Automaton has 24900 states and 31963 transitions. Word has length 161 [2021-12-14 14:52:53,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:53,093 INFO L470 AbstractCegarLoop]: Abstraction has 24900 states and 31963 transitions. [2021-12-14 14:52:53,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 14:52:53,094 INFO L276 IsEmpty]: Start isEmpty. Operand 24900 states and 31963 transitions. [2021-12-14 14:52:53,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-14 14:52:53,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:53,120 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-14 14:52:53,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 14:52:53,320 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,SelfDestructingSolverStorable17 [2021-12-14 14:52:53,321 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:53,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:53,321 INFO L85 PathProgramCache]: Analyzing trace with hash 724411373, now seen corresponding path program 1 times [2021-12-14 14:52:53,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:53,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618114571] [2021-12-14 14:52:53,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:53,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:53,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:53,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:52:53,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:53,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 14:52:53,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:53,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:52:53,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:53,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:52:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:53,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 14:52:53,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:53,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 14:52:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:53,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 14:52:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:53,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:52:53,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:53,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-14 14:52:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:53,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:52:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:53,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-14 14:52:53,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:53,384 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-14 14:52:53,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:53,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618114571] [2021-12-14 14:52:53,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618114571] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:52:53,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222865155] [2021-12-14 14:52:53,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:53,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:53,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:52:53,392 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:52:53,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 14:52:53,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:53,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 14:52:53,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:52:53,598 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-14 14:52:53,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:52:53,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222865155] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:53,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:52:53,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 14:52:53,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052316935] [2021-12-14 14:52:53,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:53,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:52:53,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:53,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:52:53,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:52:53,602 INFO L87 Difference]: Start difference. First operand 24900 states and 31963 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 14:52:54,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:54,550 INFO L93 Difference]: Finished difference Result 46579 states and 60834 transitions. [2021-12-14 14:52:54,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:52:54,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 161 [2021-12-14 14:52:54,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:54,607 INFO L225 Difference]: With dead ends: 46579 [2021-12-14 14:52:54,607 INFO L226 Difference]: Without dead ends: 22842 [2021-12-14 14:52:54,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:52:54,653 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 151 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:54,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 208 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:52:54,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22842 states. [2021-12-14 14:52:55,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22842 to 21577. [2021-12-14 14:52:55,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21577 states, 18547 states have (on average 1.2259125465034777) internal successors, (22737), 18913 states have internal predecessors, (22737), 1469 states have call successors, (1469), 1138 states have call predecessors, (1469), 1560 states have return successors, (2633), 1529 states have call predecessors, (2633), 1469 states have call successors, (2633) [2021-12-14 14:52:55,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21577 states to 21577 states and 26839 transitions. [2021-12-14 14:52:55,716 INFO L78 Accepts]: Start accepts. Automaton has 21577 states and 26839 transitions. Word has length 161 [2021-12-14 14:52:55,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:55,717 INFO L470 AbstractCegarLoop]: Abstraction has 21577 states and 26839 transitions. [2021-12-14 14:52:55,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 14:52:55,717 INFO L276 IsEmpty]: Start isEmpty. Operand 21577 states and 26839 transitions. [2021-12-14 14:52:55,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-14 14:52:55,735 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:55,735 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-14 14:52:55,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 14:52:55,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:55,936 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:55,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:55,936 INFO L85 PathProgramCache]: Analyzing trace with hash 308777324, now seen corresponding path program 1 times [2021-12-14 14:52:55,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:55,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275353889] [2021-12-14 14:52:55,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:55,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:55,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:55,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:52:55,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:55,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 14:52:55,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:55,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:52:55,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:55,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:52:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:56,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 14:52:56,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:56,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 14:52:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:56,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 14:52:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:56,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:52:56,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:56,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-14 14:52:56,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:56,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:52:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:56,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-14 14:52:56,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-14 14:52:56,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:56,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275353889] [2021-12-14 14:52:56,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275353889] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:52:56,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84037303] [2021-12-14 14:52:56,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:56,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:56,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:52:56,032 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:52:56,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 14:52:56,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:56,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 14:52:56,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:52:56,334 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 14:52:56,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:52:56,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84037303] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:56,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:52:56,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 14:52:56,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259806658] [2021-12-14 14:52:56,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:56,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:52:56,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:56,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:52:56,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:52:56,336 INFO L87 Difference]: Start difference. First operand 21577 states and 26839 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 14:52:57,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:57,142 INFO L93 Difference]: Finished difference Result 37035 states and 47315 transitions. [2021-12-14 14:52:57,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:52:57,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 161 [2021-12-14 14:52:57,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:57,196 INFO L225 Difference]: With dead ends: 37035 [2021-12-14 14:52:57,196 INFO L226 Difference]: Without dead ends: 21679 [2021-12-14 14:52:57,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:52:57,224 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 123 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:57,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 467 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:52:57,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21679 states. [2021-12-14 14:52:57,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21679 to 21577. [2021-12-14 14:52:57,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21577 states, 18547 states have (on average 1.1985226721302638) internal successors, (22229), 18913 states have internal predecessors, (22229), 1469 states have call successors, (1469), 1138 states have call predecessors, (1469), 1560 states have return successors, (2633), 1529 states have call predecessors, (2633), 1469 states have call successors, (2633) [2021-12-14 14:52:57,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21577 states to 21577 states and 26331 transitions. [2021-12-14 14:52:57,963 INFO L78 Accepts]: Start accepts. Automaton has 21577 states and 26331 transitions. Word has length 161 [2021-12-14 14:52:57,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:57,963 INFO L470 AbstractCegarLoop]: Abstraction has 21577 states and 26331 transitions. [2021-12-14 14:52:57,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 14:52:57,963 INFO L276 IsEmpty]: Start isEmpty. Operand 21577 states and 26331 transitions. [2021-12-14 14:52:57,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-14 14:52:57,981 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:57,981 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-14 14:52:58,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-14 14:52:58,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:58,181 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:58,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:58,182 INFO L85 PathProgramCache]: Analyzing trace with hash -29438826, now seen corresponding path program 1 times [2021-12-14 14:52:58,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:58,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202780056] [2021-12-14 14:52:58,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:58,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:58,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:58,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:52:58,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:58,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 14:52:58,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:58,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:52:58,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:58,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:52:58,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:58,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 14:52:58,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:58,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 14:52:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:58,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 14:52:58,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:58,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:52:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:58,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-14 14:52:58,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:58,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:52:58,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:58,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-14 14:52:58,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:58,262 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-14 14:52:58,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:58,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202780056] [2021-12-14 14:52:58,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202780056] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:52:58,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927249968] [2021-12-14 14:52:58,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:58,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:52:58,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:52:58,263 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:52:58,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-14 14:52:58,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:58,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 14:52:58,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:52:58,500 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-14 14:52:58,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:52:58,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927249968] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:58,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:52:58,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 14:52:58,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146670428] [2021-12-14 14:52:58,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:58,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:52:58,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:58,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:52:58,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:52:58,501 INFO L87 Difference]: Start difference. First operand 21577 states and 26331 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 14:52:59,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:59,141 INFO L93 Difference]: Finished difference Result 35204 states and 44063 transitions. [2021-12-14 14:52:59,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:52:59,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 162 [2021-12-14 14:52:59,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:59,191 INFO L225 Difference]: With dead ends: 35204 [2021-12-14 14:52:59,191 INFO L226 Difference]: Without dead ends: 21625 [2021-12-14 14:52:59,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:52:59,223 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 144 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:59,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 435 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:52:59,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21625 states. [2021-12-14 14:52:59,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21625 to 21577. [2021-12-14 14:52:59,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21577 states, 18547 states have (on average 1.1848277349436567) internal successors, (21975), 18913 states have internal predecessors, (21975), 1469 states have call successors, (1469), 1138 states have call predecessors, (1469), 1560 states have return successors, (2633), 1529 states have call predecessors, (2633), 1469 states have call successors, (2633) [2021-12-14 14:52:59,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21577 states to 21577 states and 26077 transitions. [2021-12-14 14:52:59,982 INFO L78 Accepts]: Start accepts. Automaton has 21577 states and 26077 transitions. Word has length 162 [2021-12-14 14:52:59,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:59,983 INFO L470 AbstractCegarLoop]: Abstraction has 21577 states and 26077 transitions. [2021-12-14 14:52:59,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 14:52:59,983 INFO L276 IsEmpty]: Start isEmpty. Operand 21577 states and 26077 transitions. [2021-12-14 14:53:00,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-14 14:53:00,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:00,001 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2021-12-14 14:53:00,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-14 14:53:00,203 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,SelfDestructingSolverStorable20 [2021-12-14 14:53:00,203 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:00,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:00,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1367110781, now seen corresponding path program 1 times [2021-12-14 14:53:00,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:00,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628542420] [2021-12-14 14:53:00,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:00,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:00,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:00,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 14:53:00,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:00,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:53:00,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:00,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:53:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:00,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 14:53:00,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:00,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 14:53:00,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:00,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:53:00,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:00,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-14 14:53:00,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:00,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-14 14:53:00,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:00,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:53:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:00,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-14 14:53:00,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-14 14:53:00,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:00,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628542420] [2021-12-14 14:53:00,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628542420] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:53:00,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564232048] [2021-12-14 14:53:00,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:00,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:53:00,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:53:00,273 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) [2021-12-14 14:53:00,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-14 14:53:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:00,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 14:53:00,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:53:00,513 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-14 14:53:00,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:53:00,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564232048] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:00,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:53:00,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 14:53:00,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305029242] [2021-12-14 14:53:00,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:00,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:53:00,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:00,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:53:00,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:53:00,515 INFO L87 Difference]: Start difference. First operand 21577 states and 26077 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 14:53:01,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:01,166 INFO L93 Difference]: Finished difference Result 36935 states and 44633 transitions. [2021-12-14 14:53:01,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:53:01,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 162 [2021-12-14 14:53:01,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:01,220 INFO L225 Difference]: With dead ends: 36935 [2021-12-14 14:53:01,221 INFO L226 Difference]: Without dead ends: 21579 [2021-12-14 14:53:01,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:53:01,252 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 125 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:01,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 475 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:53:01,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21579 states. [2021-12-14 14:53:02,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21579 to 21577. [2021-12-14 14:53:02,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21577 states, 18547 states have (on average 1.1818622957890763) internal successors, (21920), 18913 states have internal predecessors, (21920), 1469 states have call successors, (1469), 1138 states have call predecessors, (1469), 1560 states have return successors, (2618), 1529 states have call predecessors, (2618), 1469 states have call successors, (2618) [2021-12-14 14:53:02,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21577 states to 21577 states and 26007 transitions. [2021-12-14 14:53:02,201 INFO L78 Accepts]: Start accepts. Automaton has 21577 states and 26007 transitions. Word has length 162 [2021-12-14 14:53:02,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:02,202 INFO L470 AbstractCegarLoop]: Abstraction has 21577 states and 26007 transitions. [2021-12-14 14:53:02,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 14:53:02,202 INFO L276 IsEmpty]: Start isEmpty. Operand 21577 states and 26007 transitions. [2021-12-14 14:53:02,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-14 14:53:02,217 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:02,217 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2021-12-14 14:53:02,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-14 14:53:02,418 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,SelfDestructingSolverStorable21 [2021-12-14 14:53:02,418 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:02,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:02,418 INFO L85 PathProgramCache]: Analyzing trace with hash 646389301, now seen corresponding path program 1 times [2021-12-14 14:53:02,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:02,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401318975] [2021-12-14 14:53:02,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:02,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:02,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:02,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:02,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:02,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 14:53:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:02,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:53:02,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:02,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:53:02,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:02,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 14:53:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:02,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 14:53:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:02,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 14:53:02,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:02,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:53:02,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:02,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-14 14:53:02,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:02,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:53:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:02,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-14 14:53:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:02,484 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-14 14:53:02,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:02,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401318975] [2021-12-14 14:53:02,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401318975] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:53:02,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480255728] [2021-12-14 14:53:02,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:02,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:53:02,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:53:02,485 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) [2021-12-14 14:53:02,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-14 14:53:02,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:02,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 14:53:02,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:53:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-14 14:53:02,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:53:02,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480255728] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:02,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:53:02,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-14 14:53:02,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942866139] [2021-12-14 14:53:02,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:02,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 14:53:02,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:02,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 14:53:02,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 14:53:02,791 INFO L87 Difference]: Start difference. First operand 21577 states and 26007 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 14:53:03,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:03,428 INFO L93 Difference]: Finished difference Result 29740 states and 36096 transitions. [2021-12-14 14:53:03,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 14:53:03,429 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 163 [2021-12-14 14:53:03,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:03,464 INFO L225 Difference]: With dead ends: 29740 [2021-12-14 14:53:03,465 INFO L226 Difference]: Without dead ends: 15790 [2021-12-14 14:53:03,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-14 14:53:03,487 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 174 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:03,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 317 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 14:53:03,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15790 states. [2021-12-14 14:53:04,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15790 to 15730. [2021-12-14 14:53:04,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15730 states, 13536 states have (on average 1.164524231678487) internal successors, (15763), 13783 states have internal predecessors, (15763), 1075 states have call successors, (1075), 828 states have call predecessors, (1075), 1118 states have return successors, (1857), 1120 states have call predecessors, (1857), 1075 states have call successors, (1857) [2021-12-14 14:53:04,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15730 states to 15730 states and 18695 transitions. [2021-12-14 14:53:04,054 INFO L78 Accepts]: Start accepts. Automaton has 15730 states and 18695 transitions. Word has length 163 [2021-12-14 14:53:04,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:04,054 INFO L470 AbstractCegarLoop]: Abstraction has 15730 states and 18695 transitions. [2021-12-14 14:53:04,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 14:53:04,054 INFO L276 IsEmpty]: Start isEmpty. Operand 15730 states and 18695 transitions. [2021-12-14 14:53:04,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-14 14:53:04,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:04,062 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2021-12-14 14:53:04,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-14 14:53:04,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:53:04,262 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:04,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:04,263 INFO L85 PathProgramCache]: Analyzing trace with hash -446245901, now seen corresponding path program 1 times [2021-12-14 14:53:04,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:04,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125104261] [2021-12-14 14:53:04,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:04,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:04,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:04,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:04,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:04,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 14:53:04,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:04,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:53:04,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:04,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:53:04,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:04,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 14:53:04,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:04,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 14:53:04,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:04,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 14:53:04,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:04,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:53:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:04,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-14 14:53:04,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:04,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:53:04,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:04,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-14 14:53:04,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:04,341 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-14 14:53:04,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:04,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125104261] [2021-12-14 14:53:04,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125104261] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:53:04,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837448877] [2021-12-14 14:53:04,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:04,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:53:04,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:53:04,343 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) [2021-12-14 14:53:04,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-14 14:53:04,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:04,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 14:53:04,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:53:04,593 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-14 14:53:04,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:53:04,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837448877] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:04,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:53:04,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2021-12-14 14:53:04,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778984636] [2021-12-14 14:53:04,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:04,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 14:53:04,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:04,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 14:53:04,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:53:04,594 INFO L87 Difference]: Start difference. First operand 15730 states and 18695 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 14:53:05,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:05,251 INFO L93 Difference]: Finished difference Result 29497 states and 35579 transitions. [2021-12-14 14:53:05,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 14:53:05,252 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 163 [2021-12-14 14:53:05,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:05,279 INFO L225 Difference]: With dead ends: 29497 [2021-12-14 14:53:05,280 INFO L226 Difference]: Without dead ends: 13778 [2021-12-14 14:53:05,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 183 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-14 14:53:05,299 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 87 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:05,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 688 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:53:05,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13778 states. [2021-12-14 14:53:05,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13778 to 13206. [2021-12-14 14:53:05,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13206 states, 11261 states have (on average 1.142438504573306) internal successors, (12865), 11470 states have internal predecessors, (12865), 956 states have call successors, (956), 736 states have call predecessors, (956), 988 states have return successors, (1571), 1001 states have call predecessors, (1571), 956 states have call successors, (1571) [2021-12-14 14:53:05,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13206 states to 13206 states and 15392 transitions. [2021-12-14 14:53:05,792 INFO L78 Accepts]: Start accepts. Automaton has 13206 states and 15392 transitions. Word has length 163 [2021-12-14 14:53:05,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:05,793 INFO L470 AbstractCegarLoop]: Abstraction has 13206 states and 15392 transitions. [2021-12-14 14:53:05,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 14:53:05,793 INFO L276 IsEmpty]: Start isEmpty. Operand 13206 states and 15392 transitions. [2021-12-14 14:53:05,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-14 14:53:05,799 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:05,799 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2021-12-14 14:53:05,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-14 14:53:06,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:53:06,001 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:06,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:06,001 INFO L85 PathProgramCache]: Analyzing trace with hash 795348478, now seen corresponding path program 1 times [2021-12-14 14:53:06,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:06,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095206743] [2021-12-14 14:53:06,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:06,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:06,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:06,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:06,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:06,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 14:53:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:06,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:53:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:06,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:53:06,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:06,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 14:53:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:06,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 14:53:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:06,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 14:53:06,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:06,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:53:06,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:06,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-14 14:53:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:06,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:53:06,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:06,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-14 14:53:06,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:06,098 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-14 14:53:06,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:06,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095206743] [2021-12-14 14:53:06,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095206743] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:53:06,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786033636] [2021-12-14 14:53:06,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:06,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:53:06,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:53:06,099 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:53:06,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-14 14:53:06,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:06,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 14:53:06,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:53:06,372 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-14 14:53:06,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:53:06,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786033636] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:06,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:53:06,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2021-12-14 14:53:06,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979387383] [2021-12-14 14:53:06,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:06,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 14:53:06,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:06,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 14:53:06,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:53:06,374 INFO L87 Difference]: Start difference. First operand 13206 states and 15392 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 14:53:06,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:06,844 INFO L93 Difference]: Finished difference Result 26361 states and 31178 transitions. [2021-12-14 14:53:06,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 14:53:06,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 163 [2021-12-14 14:53:06,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:06,875 INFO L225 Difference]: With dead ends: 26361 [2021-12-14 14:53:06,876 INFO L226 Difference]: Without dead ends: 13166 [2021-12-14 14:53:06,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 183 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-14 14:53:06,898 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 49 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:06,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 678 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:53:06,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13166 states. [2021-12-14 14:53:07,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13166 to 12726. [2021-12-14 14:53:07,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12726 states, 10805 states have (on average 1.121795465062471) internal successors, (12121), 10998 states have internal predecessors, (12121), 956 states have call successors, (956), 736 states have call predecessors, (956), 964 states have return successors, (1459), 993 states have call predecessors, (1459), 956 states have call successors, (1459) [2021-12-14 14:53:07,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12726 states to 12726 states and 14536 transitions. [2021-12-14 14:53:07,415 INFO L78 Accepts]: Start accepts. Automaton has 12726 states and 14536 transitions. Word has length 163 [2021-12-14 14:53:07,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:07,415 INFO L470 AbstractCegarLoop]: Abstraction has 12726 states and 14536 transitions. [2021-12-14 14:53:07,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 14:53:07,415 INFO L276 IsEmpty]: Start isEmpty. Operand 12726 states and 14536 transitions. [2021-12-14 14:53:07,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-14 14:53:07,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:07,421 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2021-12-14 14:53:07,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-14 14:53:07,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-14 14:53:07,622 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:07,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:07,622 INFO L85 PathProgramCache]: Analyzing trace with hash -734104060, now seen corresponding path program 1 times [2021-12-14 14:53:07,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:07,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936005507] [2021-12-14 14:53:07,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:07,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:07,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:07,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 14:53:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:07,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:53:07,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:07,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:53:07,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:07,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 14:53:07,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:07,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 14:53:07,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:07,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 14:53:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:07,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:53:07,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:07,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-14 14:53:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:07,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:53:07,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:07,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-14 14:53:07,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:07,700 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-14 14:53:07,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:07,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936005507] [2021-12-14 14:53:07,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936005507] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:53:07,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619802177] [2021-12-14 14:53:07,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:07,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:53:07,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:53:07,702 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:53:07,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-14 14:53:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:07,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 14:53:07,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:53:07,951 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-14 14:53:07,951 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:53:07,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619802177] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:07,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:53:07,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2021-12-14 14:53:07,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952095337] [2021-12-14 14:53:07,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:07,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 14:53:07,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:07,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 14:53:07,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:53:07,953 INFO L87 Difference]: Start difference. First operand 12726 states and 14536 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 14:53:08,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:08,354 INFO L93 Difference]: Finished difference Result 23245 states and 26881 transitions. [2021-12-14 14:53:08,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 14:53:08,354 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 163 [2021-12-14 14:53:08,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:08,375 INFO L225 Difference]: With dead ends: 23245 [2021-12-14 14:53:08,375 INFO L226 Difference]: Without dead ends: 10530 [2021-12-14 14:53:08,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 183 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-14 14:53:08,392 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 10 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:08,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 663 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:53:08,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10530 states. [2021-12-14 14:53:08,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10530 to 10482. [2021-12-14 14:53:08,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10482 states, 8961 states have (on average 1.1008815980359334) internal successors, (9865), 9058 states have internal predecessors, (9865), 792 states have call successors, (792), 608 states have call predecessors, (792), 728 states have return successors, (1049), 817 states have call predecessors, (1049), 792 states have call successors, (1049) [2021-12-14 14:53:08,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10482 states to 10482 states and 11706 transitions. [2021-12-14 14:53:08,800 INFO L78 Accepts]: Start accepts. Automaton has 10482 states and 11706 transitions. Word has length 163 [2021-12-14 14:53:08,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:08,800 INFO L470 AbstractCegarLoop]: Abstraction has 10482 states and 11706 transitions. [2021-12-14 14:53:08,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 14:53:08,800 INFO L276 IsEmpty]: Start isEmpty. Operand 10482 states and 11706 transitions. [2021-12-14 14:53:08,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-12-14 14:53:08,807 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:08,807 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-14 14:53:08,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-14 14:53:09,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-14 14:53:09,008 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:09,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:09,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1729265870, now seen corresponding path program 1 times [2021-12-14 14:53:09,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:09,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413943301] [2021-12-14 14:53:09,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:09,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:09,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:09,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 14:53:09,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:53:09,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:53:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 14:53:09,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-14 14:53:09,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:53:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-14 14:53:09,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 14:53:09,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:53:09,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-12-14 14:53:09,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:53:09,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-12-14 14:53:09,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,081 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-12-14 14:53:09,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:09,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413943301] [2021-12-14 14:53:09,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413943301] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:53:09,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392072700] [2021-12-14 14:53:09,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:09,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:53:09,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:53:09,088 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:53:09,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-14 14:53:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 14:53:09,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:53:09,362 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-14 14:53:09,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:53:09,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392072700] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:09,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:53:09,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 14:53:09,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098609949] [2021-12-14 14:53:09,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:09,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:53:09,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:09,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:53:09,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:53:09,363 INFO L87 Difference]: Start difference. First operand 10482 states and 11706 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-14 14:53:09,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:09,558 INFO L93 Difference]: Finished difference Result 14200 states and 15867 transitions. [2021-12-14 14:53:09,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:53:09,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) Word has length 200 [2021-12-14 14:53:09,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:09,566 INFO L225 Difference]: With dead ends: 14200 [2021-12-14 14:53:09,566 INFO L226 Difference]: Without dead ends: 3266 [2021-12-14 14:53:09,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:53:09,577 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 124 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:09,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 430 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:53:09,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3266 states. [2021-12-14 14:53:09,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3266 to 3266. [2021-12-14 14:53:09,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3266 states, 2773 states have (on average 1.0952037504507752) internal successors, (3037), 2794 states have internal predecessors, (3037), 276 states have call successors, (276), 200 states have call predecessors, (276), 216 states have return successors, (301), 273 states have call predecessors, (301), 276 states have call successors, (301) [2021-12-14 14:53:09,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3266 states to 3266 states and 3614 transitions. [2021-12-14 14:53:09,690 INFO L78 Accepts]: Start accepts. Automaton has 3266 states and 3614 transitions. Word has length 200 [2021-12-14 14:53:09,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:09,691 INFO L470 AbstractCegarLoop]: Abstraction has 3266 states and 3614 transitions. [2021-12-14 14:53:09,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-14 14:53:09,691 INFO L276 IsEmpty]: Start isEmpty. Operand 3266 states and 3614 transitions. [2021-12-14 14:53:09,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-14 14:53:09,694 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:09,694 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2021-12-14 14:53:09,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-14 14:53:09,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-14 14:53:09,895 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:09,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:09,895 INFO L85 PathProgramCache]: Analyzing trace with hash 208727340, now seen corresponding path program 1 times [2021-12-14 14:53:09,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:09,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340371266] [2021-12-14 14:53:09,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:09,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:09,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-14 14:53:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:53:09,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 14:53:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-14 14:53:09,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 14:53:09,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-14 14:53:09,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:53:09,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-14 14:53:09,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:53:09,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-14 14:53:09,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 14:53:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2021-12-14 14:53:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-12-14 14:53:09,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:09,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340371266] [2021-12-14 14:53:09,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340371266] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:09,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:09,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:53:09,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034987769] [2021-12-14 14:53:09,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:09,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:53:09,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:09,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:53:09,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:53:09,999 INFO L87 Difference]: Start difference. First operand 3266 states and 3614 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 5 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-14 14:53:10,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:10,674 INFO L93 Difference]: Finished difference Result 3482 states and 3838 transitions. [2021-12-14 14:53:10,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:53:10,674 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 5 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 201 [2021-12-14 14:53:10,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:10,675 INFO L225 Difference]: With dead ends: 3482 [2021-12-14 14:53:10,676 INFO L226 Difference]: Without dead ends: 0 [2021-12-14 14:53:10,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:53:10,679 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 662 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:10,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [695 Valid, 849 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 14:53:10,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-14 14:53:10,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-14 14:53:10,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:53:10,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-14 14:53:10,680 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 201 [2021-12-14 14:53:10,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:10,680 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-14 14:53:10,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 5 states have internal predecessors, (111), 5 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-14 14:53:10,681 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-14 14:53:10,681 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-14 14:53:10,683 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-14 14:53:10,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-14 14:53:10,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.