./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-2.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 fee2fbeec3a60e447cd74345d2f8a46dc28fcea89eab2880c2a2ccd5802bfaa0 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 21:02:46,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 21:02:46,720 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 21:02:46,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 21:02:46,781 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 21:02:46,782 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 21:02:46,784 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 21:02:46,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 21:02:46,789 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 21:02:46,791 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 21:02:46,792 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 21:02:46,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 21:02:46,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 21:02:46,797 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 21:02:46,799 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 21:02:46,800 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 21:02:46,804 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 21:02:46,806 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 21:02:46,807 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 21:02:46,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 21:02:46,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 21:02:46,814 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 21:02:46,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 21:02:46,816 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 21:02:46,818 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 21:02:46,821 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 21:02:46,822 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 21:02:46,823 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 21:02:46,823 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 21:02:46,824 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 21:02:46,824 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 21:02:46,824 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 21:02:46,825 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 21:02:46,825 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 21:02:46,826 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 21:02:46,826 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 21:02:46,827 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 21:02:46,827 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 21:02:46,827 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 21:02:46,828 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 21:02:46,828 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 21:02:46,829 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 21:02:46,849 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 21:02:46,849 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 21:02:46,850 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 21:02:46,850 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 21:02:46,851 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 21:02:46,851 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 21:02:46,852 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 21:02:46,852 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 21:02:46,852 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 21:02:46,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 21:02:46,853 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 21:02:46,853 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 21:02:46,854 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 21:02:46,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 21:02:46,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 21:02:46,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 21:02:46,854 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 21:02:46,855 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 21:02:46,855 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 21:02:46,855 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 21:02:46,855 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 21:02:46,855 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 21:02:46,855 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 21:02:46,856 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 21:02:46,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:02:46,856 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 21:02:46,856 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 21:02:46,857 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 21:02:46,857 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 21:02:46,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 21:02:46,858 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 21:02:46,858 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 21:02:46,858 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 21:02:46,858 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 21:02:46,858 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fee2fbeec3a60e447cd74345d2f8a46dc28fcea89eab2880c2a2ccd5802bfaa0 [2021-12-17 21:02:47,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 21:02:47,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 21:02:47,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 21:02:47,041 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 21:02:47,041 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 21:02:47,042 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-2.c [2021-12-17 21:02:47,089 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6eb93ecd/75f4f42a047c464d863e388a32ee567f/FLAGa25683c4a [2021-12-17 21:02:47,412 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 21:02:47,413 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-2.c [2021-12-17 21:02:47,422 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6eb93ecd/75f4f42a047c464d863e388a32ee567f/FLAGa25683c4a [2021-12-17 21:02:47,813 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6eb93ecd/75f4f42a047c464d863e388a32ee567f [2021-12-17 21:02:47,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 21:02:47,818 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 21:02:47,819 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 21:02:47,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 21:02:47,822 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 21:02:47,823 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:02:47" (1/1) ... [2021-12-17 21:02:47,825 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@133713ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:02:47, skipping insertion in model container [2021-12-17 21:02:47,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:02:47" (1/1) ... [2021-12-17 21:02:47,829 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 21:02:47,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 21:02:48,020 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/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-2.c[913,926] [2021-12-17 21:02:48,044 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/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-2.c[5977,5990] [2021-12-17 21:02:48,086 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:02:48,094 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 21:02:48,105 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/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-2.c[913,926] [2021-12-17 21:02:48,115 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/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-2.c[5977,5990] [2021-12-17 21:02:48,141 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:02:48,154 INFO L208 MainTranslator]: Completed translation [2021-12-17 21:02:48,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:02:48 WrapperNode [2021-12-17 21:02:48,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 21:02:48,156 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 21:02:48,156 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 21:02:48,156 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 21:02:48,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:02:48" (1/1) ... [2021-12-17 21:02:48,169 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:02:48" (1/1) ... [2021-12-17 21:02:48,192 INFO L137 Inliner]: procedures = 60, calls = 66, calls flagged for inlining = 35, calls inlined = 35, statements flattened = 707 [2021-12-17 21:02:48,192 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 21:02:48,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 21:02:48,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 21:02:48,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 21:02:48,201 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:02:48" (1/1) ... [2021-12-17 21:02:48,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:02:48" (1/1) ... [2021-12-17 21:02:48,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:02:48" (1/1) ... [2021-12-17 21:02:48,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:02:48" (1/1) ... [2021-12-17 21:02:48,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:02:48" (1/1) ... [2021-12-17 21:02:48,219 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:02:48" (1/1) ... [2021-12-17 21:02:48,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:02:48" (1/1) ... [2021-12-17 21:02:48,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 21:02:48,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 21:02:48,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 21:02:48,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 21:02:48,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:02:48" (1/1) ... [2021-12-17 21:02:48,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:02:48,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:02:48,280 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) [2021-12-17 21:02:48,286 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 [2021-12-17 21:02:48,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 21:02:48,311 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-17 21:02:48,311 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-17 21:02:48,312 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-17 21:02:48,313 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-17 21:02:48,313 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-17 21:02:48,313 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-17 21:02:48,313 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-17 21:02:48,313 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-17 21:02:48,314 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-17 21:02:48,314 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-17 21:02:48,314 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-17 21:02:48,314 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-17 21:02:48,314 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-17 21:02:48,314 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-17 21:02:48,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 21:02:48,314 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-17 21:02:48,315 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-17 21:02:48,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 21:02:48,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 21:02:48,315 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-17 21:02:48,315 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-17 21:02:48,381 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 21:02:48,382 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 21:02:48,736 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 21:02:48,743 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 21:02:48,744 INFO L301 CfgBuilder]: Removed 13 assume(true) statements. [2021-12-17 21:02:48,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:02:48 BoogieIcfgContainer [2021-12-17 21:02:48,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 21:02:48,747 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 21:02:48,747 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 21:02:48,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 21:02:48,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 09:02:47" (1/3) ... [2021-12-17 21:02:48,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@536475b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:02:48, skipping insertion in model container [2021-12-17 21:02:48,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:02:48" (2/3) ... [2021-12-17 21:02:48,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@536475b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:02:48, skipping insertion in model container [2021-12-17 21:02:48,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:02:48" (3/3) ... [2021-12-17 21:02:48,752 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.06.cil-2.c [2021-12-17 21:02:48,755 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 21:02:48,756 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 21:02:48,789 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 21:02:48,794 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 [2021-12-17 21:02:48,795 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 21:02:48,825 INFO L276 IsEmpty]: Start isEmpty. Operand has 304 states, 266 states have (on average 1.6165413533834587) internal successors, (430), 271 states have internal predecessors, (430), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-17 21:02:48,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-17 21:02:48,831 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:02:48,831 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] [2021-12-17 21:02:48,832 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:02:48,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:02:48,836 INFO L85 PathProgramCache]: Analyzing trace with hash 241616146, now seen corresponding path program 1 times [2021-12-17 21:02:48,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:02:48,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693865887] [2021-12-17 21:02:48,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:48,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:02:48,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:49,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:02:49,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:49,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 21:02:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:02:49,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:02:49,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693865887] [2021-12-17 21:02:49,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693865887] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:02:49,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:02:49,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:02:49,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218258314] [2021-12-17 21:02:49,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:02:49,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:02:49,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:02:49,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:02:49,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:02:49,124 INFO L87 Difference]: Start difference. First operand has 304 states, 266 states have (on average 1.6165413533834587) internal successors, (430), 271 states have internal predecessors, (430), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 21:02:49,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:02:49,349 INFO L93 Difference]: Finished difference Result 659 states and 1044 transitions. [2021-12-17 21:02:49,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:02:49,351 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-12-17 21:02:49,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:02:49,361 INFO L225 Difference]: With dead ends: 659 [2021-12-17 21:02:49,361 INFO L226 Difference]: Without dead ends: 364 [2021-12-17 21:02:49,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:02:49,368 INFO L933 BasicCegarLoop]: 465 mSDtfsCounter, 584 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:02:49,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [604 Valid, 766 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 21:02:49,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-12-17 21:02:49,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 358. [2021-12-17 21:02:49,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 315 states have (on average 1.488888888888889) internal successors, (469), 319 states have internal predecessors, (469), 30 states have call successors, (30), 11 states have call predecessors, (30), 11 states have return successors, (34), 28 states have call predecessors, (34), 28 states have call successors, (34) [2021-12-17 21:02:49,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 533 transitions. [2021-12-17 21:02:49,477 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 533 transitions. Word has length 44 [2021-12-17 21:02:49,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:02:49,477 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 533 transitions. [2021-12-17 21:02:49,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 21:02:49,478 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 533 transitions. [2021-12-17 21:02:49,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 21:02:49,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:02:49,493 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] [2021-12-17 21:02:49,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 21:02:49,493 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:02:49,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:02:49,494 INFO L85 PathProgramCache]: Analyzing trace with hash 283852217, now seen corresponding path program 1 times [2021-12-17 21:02:49,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:02:49,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347925823] [2021-12-17 21:02:49,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:49,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:02:49,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:49,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:02:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:49,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 21:02:49,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:49,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:02:49,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:02:49,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347925823] [2021-12-17 21:02:49,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347925823] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:02:49,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:02:49,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:02:49,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809432468] [2021-12-17 21:02:49,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:02:49,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:02:49,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:02:49,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:02:49,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:02:49,579 INFO L87 Difference]: Start difference. First operand 358 states and 533 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 21:02:49,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:02:49,846 INFO L93 Difference]: Finished difference Result 606 states and 873 transitions. [2021-12-17 21:02:49,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:02:49,847 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-17 21:02:49,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:02:49,850 INFO L225 Difference]: With dead ends: 606 [2021-12-17 21:02:49,851 INFO L226 Difference]: Without dead ends: 482 [2021-12-17 21:02:49,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:02:49,853 INFO L933 BasicCegarLoop]: 488 mSDtfsCounter, 248 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:02:49,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 990 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 21:02:49,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-12-17 21:02:49,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 425. [2021-12-17 21:02:49,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 376 states have (on average 1.4707446808510638) internal successors, (553), 380 states have internal predecessors, (553), 33 states have call successors, (33), 14 states have call predecessors, (33), 14 states have return successors, (37), 31 states have call predecessors, (37), 31 states have call successors, (37) [2021-12-17 21:02:49,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 623 transitions. [2021-12-17 21:02:49,877 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 623 transitions. Word has length 45 [2021-12-17 21:02:49,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:02:49,877 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 623 transitions. [2021-12-17 21:02:49,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 21:02:49,878 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 623 transitions. [2021-12-17 21:02:49,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 21:02:49,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:02:49,879 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] [2021-12-17 21:02:49,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 21:02:49,880 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:02:49,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:02:49,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1000505244, now seen corresponding path program 1 times [2021-12-17 21:02:49,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:02:49,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144791821] [2021-12-17 21:02:49,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:49,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:02:49,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:49,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:02:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:49,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 21:02:49,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:49,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:02:49,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:02:49,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144791821] [2021-12-17 21:02:49,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144791821] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:02:49,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:02:49,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:02:49,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690810527] [2021-12-17 21:02:49,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:02:49,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:02:49,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:02:49,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:02:49,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:02:49,926 INFO L87 Difference]: Start difference. First operand 425 states and 623 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 21:02:50,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:02:50,047 INFO L93 Difference]: Finished difference Result 833 states and 1182 transitions. [2021-12-17 21:02:50,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:02:50,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-17 21:02:50,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:02:50,051 INFO L225 Difference]: With dead ends: 833 [2021-12-17 21:02:50,051 INFO L226 Difference]: Without dead ends: 642 [2021-12-17 21:02:50,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:02:50,053 INFO L933 BasicCegarLoop]: 463 mSDtfsCounter, 593 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:02:50,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [613 Valid, 764 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 21:02:50,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-12-17 21:02:50,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 590. [2021-12-17 21:02:50,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 522 states have (on average 1.4233716475095786) internal successors, (743), 529 states have internal predecessors, (743), 44 states have call successors, (44), 21 states have call predecessors, (44), 22 states have return successors, (54), 40 states have call predecessors, (54), 42 states have call successors, (54) [2021-12-17 21:02:50,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 841 transitions. [2021-12-17 21:02:50,081 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 841 transitions. Word has length 45 [2021-12-17 21:02:50,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:02:50,081 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 841 transitions. [2021-12-17 21:02:50,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 21:02:50,082 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 841 transitions. [2021-12-17 21:02:50,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-17 21:02:50,083 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:02:50,084 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:02:50,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 21:02:50,084 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:02:50,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:02:50,085 INFO L85 PathProgramCache]: Analyzing trace with hash 595494690, now seen corresponding path program 1 times [2021-12-17 21:02:50,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:02:50,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503982411] [2021-12-17 21:02:50,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:50,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:02:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:50,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:02:50,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:50,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 21:02:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:50,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-17 21:02:50,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:50,137 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 21:02:50,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:02:50,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503982411] [2021-12-17 21:02:50,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503982411] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:02:50,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:02:50,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:02:50,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455282518] [2021-12-17 21:02:50,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:02:50,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:02:50,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:02:50,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:02:50,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:02:50,140 INFO L87 Difference]: Start difference. First operand 590 states and 841 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 21:02:50,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:02:50,380 INFO L93 Difference]: Finished difference Result 1174 states and 1626 transitions. [2021-12-17 21:02:50,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:02:50,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2021-12-17 21:02:50,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:02:50,385 INFO L225 Difference]: With dead ends: 1174 [2021-12-17 21:02:50,385 INFO L226 Difference]: Without dead ends: 818 [2021-12-17 21:02:50,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:02:50,389 INFO L933 BasicCegarLoop]: 512 mSDtfsCounter, 232 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:02:50,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 1023 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 21:02:50,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-12-17 21:02:50,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 780. [2021-12-17 21:02:50,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 688 states have (on average 1.370639534883721) internal successors, (943), 697 states have internal predecessors, (943), 58 states have call successors, (58), 29 states have call predecessors, (58), 32 states have return successors, (78), 54 states have call predecessors, (78), 56 states have call successors, (78) [2021-12-17 21:02:50,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1079 transitions. [2021-12-17 21:02:50,421 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1079 transitions. Word has length 62 [2021-12-17 21:02:50,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:02:50,423 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 1079 transitions. [2021-12-17 21:02:50,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 21:02:50,423 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1079 transitions. [2021-12-17 21:02:50,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 21:02:50,426 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:02:50,426 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:02:50,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 21:02:50,428 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:02:50,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:02:50,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1015259381, now seen corresponding path program 1 times [2021-12-17 21:02:50,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:02:50,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472722664] [2021-12-17 21:02:50,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:50,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:02:50,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:50,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:02:50,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:50,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:02:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:50,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-17 21:02:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:50,482 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 21:02:50,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:02:50,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472722664] [2021-12-17 21:02:50,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472722664] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:02:50,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:02:50,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:02:50,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996503713] [2021-12-17 21:02:50,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:02:50,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:02:50,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:02:50,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:02:50,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:02:50,485 INFO L87 Difference]: Start difference. First operand 780 states and 1079 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 21:02:50,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:02:50,618 INFO L93 Difference]: Finished difference Result 1433 states and 1932 transitions. [2021-12-17 21:02:50,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:02:50,619 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2021-12-17 21:02:50,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:02:50,623 INFO L225 Difference]: With dead ends: 1433 [2021-12-17 21:02:50,623 INFO L226 Difference]: Without dead ends: 979 [2021-12-17 21:02:50,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:02:50,625 INFO L933 BasicCegarLoop]: 458 mSDtfsCounter, 580 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:02:50,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 761 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 21:02:50,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2021-12-17 21:02:50,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 924. [2021-12-17 21:02:50,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 816 states have (on average 1.3406862745098038) internal successors, (1094), 827 states have internal predecessors, (1094), 66 states have call successors, (66), 35 states have call predecessors, (66), 40 states have return successors, (92), 62 states have call predecessors, (92), 64 states have call successors, (92) [2021-12-17 21:02:50,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1252 transitions. [2021-12-17 21:02:50,659 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1252 transitions. Word has length 67 [2021-12-17 21:02:50,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:02:50,660 INFO L470 AbstractCegarLoop]: Abstraction has 924 states and 1252 transitions. [2021-12-17 21:02:50,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 21:02:50,660 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1252 transitions. [2021-12-17 21:02:50,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 21:02:50,662 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:02:50,662 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 21:02:50,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 21:02:50,662 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:02:50,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:02:50,663 INFO L85 PathProgramCache]: Analyzing trace with hash -307618110, now seen corresponding path program 1 times [2021-12-17 21:02:50,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:02:50,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462815498] [2021-12-17 21:02:50,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:50,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:02:50,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:50,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:02:50,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:50,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:02:50,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:50,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:02:50,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:50,735 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 21:02:50,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:02:50,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462815498] [2021-12-17 21:02:50,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462815498] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:02:50,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568618798] [2021-12-17 21:02:50,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:50,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:02:50,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:02:50,738 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) [2021-12-17 21:02:50,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 21:02:50,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:50,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 21:02:50,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:02:50,970 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:02:50,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 21:02:51,062 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 21:02:51,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568618798] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 21:02:51,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 21:02:51,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-12-17 21:02:51,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390319107] [2021-12-17 21:02:51,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:02:51,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:02:51,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:02:51,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:02:51,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:02:51,064 INFO L87 Difference]: Start difference. First operand 924 states and 1252 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 21:02:51,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:02:51,167 INFO L93 Difference]: Finished difference Result 980 states and 1320 transitions. [2021-12-17 21:02:51,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 21:02:51,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-12-17 21:02:51,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:02:51,171 INFO L225 Difference]: With dead ends: 980 [2021-12-17 21:02:51,171 INFO L226 Difference]: Without dead ends: 977 [2021-12-17 21:02:51,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:02:51,172 INFO L933 BasicCegarLoop]: 467 mSDtfsCounter, 791 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:02:51,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 534 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 21:02:51,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-12-17 21:02:51,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 923. [2021-12-17 21:02:51,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 816 states have (on average 1.338235294117647) internal successors, (1092), 826 states have internal predecessors, (1092), 65 states have call successors, (65), 35 states have call predecessors, (65), 40 states have return successors, (92), 62 states have call predecessors, (92), 64 states have call successors, (92) [2021-12-17 21:02:51,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1249 transitions. [2021-12-17 21:02:51,201 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1249 transitions. Word has length 68 [2021-12-17 21:02:51,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:02:51,202 INFO L470 AbstractCegarLoop]: Abstraction has 923 states and 1249 transitions. [2021-12-17 21:02:51,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 21:02:51,202 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1249 transitions. [2021-12-17 21:02:51,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-17 21:02:51,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:02:51,204 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 21:02:51,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 21:02:51,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-17 21:02:51,418 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:02:51,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:02:51,418 INFO L85 PathProgramCache]: Analyzing trace with hash -947179730, now seen corresponding path program 1 times [2021-12-17 21:02:51,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:02:51,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296243420] [2021-12-17 21:02:51,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:51,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:02:51,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:51,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:02:51,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:51,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:02:51,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:51,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:02:51,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 21:02:51,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:02:51,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296243420] [2021-12-17 21:02:51,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296243420] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:02:51,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150872526] [2021-12-17 21:02:51,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:51,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:02:51,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:02:51,514 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) [2021-12-17 21:02:51,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 21:02:51,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:51,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 21:02:51,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:02:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:02:51,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 21:02:51,958 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 21:02:51,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150872526] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 21:02:51,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 21:02:51,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-12-17 21:02:51,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592630765] [2021-12-17 21:02:51,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 21:02:51,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 21:02:51,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:02:51,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 21:02:51,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:02:51,960 INFO L87 Difference]: Start difference. First operand 923 states and 1249 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-17 21:02:52,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:02:52,984 INFO L93 Difference]: Finished difference Result 2623 states and 3469 transitions. [2021-12-17 21:02:52,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-17 21:02:52,984 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2021-12-17 21:02:52,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:02:52,992 INFO L225 Difference]: With dead ends: 2623 [2021-12-17 21:02:52,992 INFO L226 Difference]: Without dead ends: 2079 [2021-12-17 21:02:52,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-12-17 21:02:52,995 INFO L933 BasicCegarLoop]: 572 mSDtfsCounter, 905 mSDsluCounter, 2741 mSDsCounter, 0 mSdLazyCounter, 1468 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 932 SdHoareTripleChecker+Valid, 3313 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 21:02:52,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [932 Valid, 3313 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1468 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 21:02:52,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2079 states. [2021-12-17 21:02:53,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2079 to 1312. [2021-12-17 21:02:53,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1166 states have (on average 1.3087478559176673) internal successors, (1526), 1184 states have internal predecessors, (1526), 85 states have call successors, (85), 49 states have call predecessors, (85), 59 states have return successors, (126), 79 states have call predecessors, (126), 84 states have call successors, (126) [2021-12-17 21:02:53,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 1737 transitions. [2021-12-17 21:02:53,052 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 1737 transitions. Word has length 69 [2021-12-17 21:02:53,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:02:53,053 INFO L470 AbstractCegarLoop]: Abstraction has 1312 states and 1737 transitions. [2021-12-17 21:02:53,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-17 21:02:53,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 1737 transitions. [2021-12-17 21:02:53,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-17 21:02:53,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:02:53,056 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 21:02:53,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 21:02:53,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-17 21:02:53,272 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:02:53,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:02:53,273 INFO L85 PathProgramCache]: Analyzing trace with hash 172675214, now seen corresponding path program 1 times [2021-12-17 21:02:53,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:02:53,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845884942] [2021-12-17 21:02:53,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:53,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:02:53,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:53,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:02:53,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:53,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:02:53,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:53,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-17 21:02:53,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:53,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 21:02:53,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:53,346 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-17 21:02:53,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:02:53,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845884942] [2021-12-17 21:02:53,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845884942] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:02:53,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318583004] [2021-12-17 21:02:53,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:53,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:02:53,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:02:53,348 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) [2021-12-17 21:02:53,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 21:02:53,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:53,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 21:02:53,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:02:53,561 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 21:02:53,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:02:53,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318583004] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:02:53,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:02:53,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-17 21:02:53,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20239871] [2021-12-17 21:02:53,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:02:53,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:02:53,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:02:53,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:02:53,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:02:53,563 INFO L87 Difference]: Start difference. First operand 1312 states and 1737 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-17 21:02:53,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:02:53,654 INFO L93 Difference]: Finished difference Result 2035 states and 2675 transitions. [2021-12-17 21:02:53,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:02:53,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2021-12-17 21:02:53,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:02:53,673 INFO L225 Difference]: With dead ends: 2035 [2021-12-17 21:02:53,673 INFO L226 Difference]: Without dead ends: 1190 [2021-12-17 21:02:53,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:02:53,678 INFO L933 BasicCegarLoop]: 473 mSDtfsCounter, 402 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:02:53,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 548 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:02:53,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2021-12-17 21:02:53,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1175. [2021-12-17 21:02:53,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 1045 states have (on average 1.309090909090909) internal successors, (1368), 1062 states have internal predecessors, (1368), 77 states have call successors, (77), 43 states have call predecessors, (77), 51 states have return successors, (112), 70 states have call predecessors, (112), 76 states have call successors, (112) [2021-12-17 21:02:53,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 1557 transitions. [2021-12-17 21:02:53,730 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 1557 transitions. Word has length 88 [2021-12-17 21:02:53,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:02:53,731 INFO L470 AbstractCegarLoop]: Abstraction has 1175 states and 1557 transitions. [2021-12-17 21:02:53,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-17 21:02:53,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 1557 transitions. [2021-12-17 21:02:53,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-17 21:02:53,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:02:53,738 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 21:02:53,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-17 21:02:53,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:02:53,955 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:02:53,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:02:53,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1628325681, now seen corresponding path program 1 times [2021-12-17 21:02:53,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:02:53,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077952640] [2021-12-17 21:02:53,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:53,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:02:53,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:53,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:02:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:53,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:02:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:54,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 21:02:54,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:54,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 21:02:54,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:54,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 21:02:54,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 21:02:54,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:02:54,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077952640] [2021-12-17 21:02:54,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077952640] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:02:54,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698077162] [2021-12-17 21:02:54,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:54,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:02:54,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:02:54,042 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) [2021-12-17 21:02:54,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 21:02:54,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:54,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 21:02:54,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:02:54,246 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 21:02:54,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:02:54,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698077162] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:02:54,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:02:54,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-17 21:02:54,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042412661] [2021-12-17 21:02:54,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:02:54,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:02:54,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:02:54,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:02:54,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:02:54,249 INFO L87 Difference]: Start difference. First operand 1175 states and 1557 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-17 21:02:54,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:02:54,297 INFO L93 Difference]: Finished difference Result 1554 states and 2025 transitions. [2021-12-17 21:02:54,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:02:54,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2021-12-17 21:02:54,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:02:54,299 INFO L225 Difference]: With dead ends: 1554 [2021-12-17 21:02:54,299 INFO L226 Difference]: Without dead ends: 228 [2021-12-17 21:02:54,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:02:54,303 INFO L933 BasicCegarLoop]: 487 mSDtfsCounter, 62 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 904 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 [2021-12-17 21:02:54,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 904 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:02:54,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-12-17 21:02:54,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2021-12-17 21:02:54,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 201 states have (on average 1.5422885572139304) internal successors, (310), 202 states have internal predecessors, (310), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-17 21:02:54,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 350 transitions. [2021-12-17 21:02:54,310 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 350 transitions. Word has length 103 [2021-12-17 21:02:54,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:02:54,310 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 350 transitions. [2021-12-17 21:02:54,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-17 21:02:54,310 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 350 transitions. [2021-12-17 21:02:54,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 21:02:54,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:02:54,311 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:02:54,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 21:02:54,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:02:54,529 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:02:54,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:02:54,529 INFO L85 PathProgramCache]: Analyzing trace with hash -678480864, now seen corresponding path program 1 times [2021-12-17 21:02:54,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:02:54,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600613520] [2021-12-17 21:02:54,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:54,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:02:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:54,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:02:54,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:54,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 21:02:54,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:54,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 21:02:54,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:54,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 21:02:54,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:54,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 21:02:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:54,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:02:54,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:02:54,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600613520] [2021-12-17 21:02:54,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600613520] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:02:54,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:02:54,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 21:02:54,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754524637] [2021-12-17 21:02:54,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:02:54,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 21:02:54,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:02:54,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 21:02:54,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:02:54,611 INFO L87 Difference]: Start difference. First operand 228 states and 350 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 3 states have internal predecessors, (102), 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) [2021-12-17 21:02:55,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:02:55,049 INFO L93 Difference]: Finished difference Result 522 states and 816 transitions. [2021-12-17 21:02:55,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 21:02:55,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 3 states have internal predecessors, (102), 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 112 [2021-12-17 21:02:55,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:02:55,051 INFO L225 Difference]: With dead ends: 522 [2021-12-17 21:02:55,051 INFO L226 Difference]: Without dead ends: 304 [2021-12-17 21:02:55,052 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 [2021-12-17 21:02:55,052 INFO L933 BasicCegarLoop]: 381 mSDtfsCounter, 577 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:02:55,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [595 Valid, 631 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 21:02:55,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-12-17 21:02:55,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 228. [2021-12-17 21:02:55,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 201 states have (on average 1.537313432835821) internal successors, (309), 202 states have internal predecessors, (309), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-17 21:02:55,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 349 transitions. [2021-12-17 21:02:55,061 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 349 transitions. Word has length 112 [2021-12-17 21:02:55,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:02:55,061 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 349 transitions. [2021-12-17 21:02:55,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 3 states have internal predecessors, (102), 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) [2021-12-17 21:02:55,062 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 349 transitions. [2021-12-17 21:02:55,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 21:02:55,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:02:55,063 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:02:55,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 21:02:55,063 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:02:55,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:02:55,063 INFO L85 PathProgramCache]: Analyzing trace with hash 628661534, now seen corresponding path program 1 times [2021-12-17 21:02:55,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:02:55,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364950607] [2021-12-17 21:02:55,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:55,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:02:55,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:55,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:02:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:55,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 21:02:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:55,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 21:02:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:55,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 21:02:55,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:55,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 21:02:55,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:55,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:02:55,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:02:55,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364950607] [2021-12-17 21:02:55,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364950607] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:02:55,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:02:55,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:02:55,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764430909] [2021-12-17 21:02:55,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:02:55,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:02:55,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:02:55,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:02:55,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:02:55,144 INFO L87 Difference]: Start difference. First operand 228 states and 349 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 4 states have internal predecessors, (102), 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) [2021-12-17 21:02:56,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:02:56,226 INFO L93 Difference]: Finished difference Result 812 states and 1276 transitions. [2021-12-17 21:02:56,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 21:02:56,227 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 4 states have internal predecessors, (102), 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 112 [2021-12-17 21:02:56,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:02:56,229 INFO L225 Difference]: With dead ends: 812 [2021-12-17 21:02:56,229 INFO L226 Difference]: Without dead ends: 599 [2021-12-17 21:02:56,229 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 [2021-12-17 21:02:56,230 INFO L933 BasicCegarLoop]: 407 mSDtfsCounter, 866 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 1185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 21:02:56,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [879 Valid, 1020 Invalid, 1185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1090 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 21:02:56,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-12-17 21:02:56,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 448. [2021-12-17 21:02:56,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 399 states have (on average 1.5513784461152882) internal successors, (619), 401 states have internal predecessors, (619), 35 states have call successors, (35), 12 states have call predecessors, (35), 13 states have return successors, (38), 35 states have call predecessors, (38), 35 states have call successors, (38) [2021-12-17 21:02:56,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 692 transitions. [2021-12-17 21:02:56,245 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 692 transitions. Word has length 112 [2021-12-17 21:02:56,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:02:56,245 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 692 transitions. [2021-12-17 21:02:56,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 4 states have internal predecessors, (102), 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) [2021-12-17 21:02:56,245 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 692 transitions. [2021-12-17 21:02:56,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 21:02:56,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:02:56,246 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:02:56,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 21:02:56,246 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:02:56,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:02:56,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1907660194, now seen corresponding path program 1 times [2021-12-17 21:02:56,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:02:56,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981582251] [2021-12-17 21:02:56,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:56,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:02:56,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:56,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:02:56,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:56,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 21:02:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:56,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 21:02:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:56,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 21:02:56,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:56,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 21:02:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:56,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:02:56,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:02:56,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981582251] [2021-12-17 21:02:56,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981582251] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:02:56,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:02:56,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:02:56,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306493330] [2021-12-17 21:02:56,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:02:56,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:02:56,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:02:56,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:02:56,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:02:56,335 INFO L87 Difference]: Start difference. First operand 448 states and 692 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-17 21:02:57,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:02:57,495 INFO L93 Difference]: Finished difference Result 1335 states and 2096 transitions. [2021-12-17 21:02:57,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:02:57,496 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 112 [2021-12-17 21:02:57,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:02:57,499 INFO L225 Difference]: With dead ends: 1335 [2021-12-17 21:02:57,499 INFO L226 Difference]: Without dead ends: 902 [2021-12-17 21:02:57,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:02:57,500 INFO L933 BasicCegarLoop]: 444 mSDtfsCounter, 931 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 1538 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 944 SdHoareTripleChecker+Valid, 1261 SdHoareTripleChecker+Invalid, 1627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 21:02:57,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [944 Valid, 1261 Invalid, 1627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1538 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 21:02:57,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2021-12-17 21:02:57,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 653. [2021-12-17 21:02:57,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 582 states have (on average 1.5446735395189004) internal successors, (899), 585 states have internal predecessors, (899), 50 states have call successors, (50), 18 states have call predecessors, (50), 20 states have return successors, (55), 51 states have call predecessors, (55), 50 states have call successors, (55) [2021-12-17 21:02:57,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1004 transitions. [2021-12-17 21:02:57,524 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1004 transitions. Word has length 112 [2021-12-17 21:02:57,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:02:57,525 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 1004 transitions. [2021-12-17 21:02:57,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-17 21:02:57,525 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1004 transitions. [2021-12-17 21:02:57,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 21:02:57,526 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:02:57,526 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:02:57,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 21:02:57,527 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:02:57,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:02:57,527 INFO L85 PathProgramCache]: Analyzing trace with hash 288685280, now seen corresponding path program 1 times [2021-12-17 21:02:57,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:02:57,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204007194] [2021-12-17 21:02:57,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:57,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:02:57,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:57,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:02:57,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:57,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 21:02:57,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:57,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 21:02:57,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:57,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 21:02:57,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:57,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 21:02:57,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:57,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:02:57,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:02:57,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204007194] [2021-12-17 21:02:57,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204007194] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:02:57,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:02:57,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:02:57,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229237101] [2021-12-17 21:02:57,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:02:57,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:02:57,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:02:57,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:02:57,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:02:57,638 INFO L87 Difference]: Start difference. First operand 653 states and 1004 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-17 21:02:58,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:02:58,147 INFO L93 Difference]: Finished difference Result 1546 states and 2426 transitions. [2021-12-17 21:02:58,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:02:58,148 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 112 [2021-12-17 21:02:58,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:02:58,151 INFO L225 Difference]: With dead ends: 1546 [2021-12-17 21:02:58,151 INFO L226 Difference]: Without dead ends: 908 [2021-12-17 21:02:58,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:02:58,158 INFO L933 BasicCegarLoop]: 355 mSDtfsCounter, 724 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:02:58,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [738 Valid, 790 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 21:02:58,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2021-12-17 21:02:58,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 653. [2021-12-17 21:02:58,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 582 states have (on average 1.5395189003436427) internal successors, (896), 585 states have internal predecessors, (896), 50 states have call successors, (50), 18 states have call predecessors, (50), 20 states have return successors, (55), 51 states have call predecessors, (55), 50 states have call successors, (55) [2021-12-17 21:02:58,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1001 transitions. [2021-12-17 21:02:58,225 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1001 transitions. Word has length 112 [2021-12-17 21:02:58,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:02:58,225 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 1001 transitions. [2021-12-17 21:02:58,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-17 21:02:58,226 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1001 transitions. [2021-12-17 21:02:58,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 21:02:58,227 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:02:58,227 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:02:58,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 21:02:58,227 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:02:58,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:02:58,227 INFO L85 PathProgramCache]: Analyzing trace with hash 260184990, now seen corresponding path program 1 times [2021-12-17 21:02:58,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:02:58,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131114500] [2021-12-17 21:02:58,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:58,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:02:58,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:58,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:02:58,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:58,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 21:02:58,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:58,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 21:02:58,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:58,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 21:02:58,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:58,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 21:02:58,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:58,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:02:58,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:02:58,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131114500] [2021-12-17 21:02:58,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131114500] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:02:58,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:02:58,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:02:58,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709045502] [2021-12-17 21:02:58,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:02:58,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:02:58,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:02:58,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:02:58,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:02:58,340 INFO L87 Difference]: Start difference. First operand 653 states and 1001 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-17 21:02:59,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:02:59,610 INFO L93 Difference]: Finished difference Result 2100 states and 3274 transitions. [2021-12-17 21:02:59,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:02:59,610 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 112 [2021-12-17 21:02:59,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:02:59,619 INFO L225 Difference]: With dead ends: 2100 [2021-12-17 21:02:59,619 INFO L226 Difference]: Without dead ends: 1462 [2021-12-17 21:02:59,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:02:59,621 INFO L933 BasicCegarLoop]: 556 mSDtfsCounter, 869 mSDsluCounter, 1153 mSDsCounter, 0 mSdLazyCounter, 1677 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 1709 SdHoareTripleChecker+Invalid, 1755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:02:59,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [882 Valid, 1709 Invalid, 1755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1677 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 21:02:59,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2021-12-17 21:02:59,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1070. [2021-12-17 21:02:59,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 955 states have (on average 1.5340314136125655) internal successors, (1465), 960 states have internal predecessors, (1465), 80 states have call successors, (80), 30 states have call predecessors, (80), 34 states have return successors, (93), 83 states have call predecessors, (93), 80 states have call successors, (93) [2021-12-17 21:02:59,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1638 transitions. [2021-12-17 21:02:59,671 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1638 transitions. Word has length 112 [2021-12-17 21:02:59,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:02:59,671 INFO L470 AbstractCegarLoop]: Abstraction has 1070 states and 1638 transitions. [2021-12-17 21:02:59,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-17 21:02:59,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1638 transitions. [2021-12-17 21:02:59,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 21:02:59,673 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:02:59,673 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:02:59,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 21:02:59,673 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:02:59,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:02:59,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1680397024, now seen corresponding path program 1 times [2021-12-17 21:02:59,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:02:59,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010554560] [2021-12-17 21:02:59,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:02:59,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:02:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:59,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:02:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:59,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 21:02:59,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:59,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 21:02:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:59,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 21:02:59,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:59,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 21:02:59,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:02:59,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:02:59,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:02:59,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010554560] [2021-12-17 21:02:59,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010554560] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:02:59,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:02:59,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:02:59,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136471629] [2021-12-17 21:02:59,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:02:59,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:02:59,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:02:59,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:02:59,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:02:59,755 INFO L87 Difference]: Start difference. First operand 1070 states and 1638 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-17 21:03:01,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:01,068 INFO L93 Difference]: Finished difference Result 3589 states and 5575 transitions. [2021-12-17 21:03:01,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:03:01,069 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 112 [2021-12-17 21:03:01,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:01,077 INFO L225 Difference]: With dead ends: 3589 [2021-12-17 21:03:01,077 INFO L226 Difference]: Without dead ends: 2534 [2021-12-17 21:03:01,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:03:01,081 INFO L933 BasicCegarLoop]: 551 mSDtfsCounter, 865 mSDsluCounter, 1153 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 1743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:01,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [878 Valid, 1704 Invalid, 1743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 21:03:01,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-12-17 21:03:01,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 1903. [2021-12-17 21:03:01,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1903 states, 1700 states have (on average 1.5288235294117647) internal successors, (2599), 1709 states have internal predecessors, (2599), 140 states have call successors, (140), 54 states have call predecessors, (140), 62 states have return successors, (175), 147 states have call predecessors, (175), 140 states have call successors, (175) [2021-12-17 21:03:01,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 2914 transitions. [2021-12-17 21:03:01,172 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 2914 transitions. Word has length 112 [2021-12-17 21:03:01,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:01,172 INFO L470 AbstractCegarLoop]: Abstraction has 1903 states and 2914 transitions. [2021-12-17 21:03:01,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-17 21:03:01,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 2914 transitions. [2021-12-17 21:03:01,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 21:03:01,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:01,175 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:01,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 21:03:01,175 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:01,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:01,175 INFO L85 PathProgramCache]: Analyzing trace with hash 196666206, now seen corresponding path program 1 times [2021-12-17 21:03:01,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:01,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278474950] [2021-12-17 21:03:01,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:01,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:01,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:01,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:03:01,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:01,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 21:03:01,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:01,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 21:03:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:01,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 21:03:01,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:01,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 21:03:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:01,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:01,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:01,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278474950] [2021-12-17 21:03:01,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278474950] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:01,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:01,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:03:01,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243170196] [2021-12-17 21:03:01,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:01,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:03:01,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:01,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:03:01,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:03:01,257 INFO L87 Difference]: Start difference. First operand 1903 states and 2914 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-17 21:03:01,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:01,986 INFO L93 Difference]: Finished difference Result 4426 states and 6883 transitions. [2021-12-17 21:03:01,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:03:01,986 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 112 [2021-12-17 21:03:01,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:01,994 INFO L225 Difference]: With dead ends: 4426 [2021-12-17 21:03:01,994 INFO L226 Difference]: Without dead ends: 2538 [2021-12-17 21:03:01,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:03:01,999 INFO L933 BasicCegarLoop]: 345 mSDtfsCounter, 629 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:01,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 897 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 21:03:02,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2538 states. [2021-12-17 21:03:02,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2538 to 1903. [2021-12-17 21:03:02,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1903 states, 1700 states have (on average 1.5235294117647058) internal successors, (2590), 1709 states have internal predecessors, (2590), 140 states have call successors, (140), 54 states have call predecessors, (140), 62 states have return successors, (175), 147 states have call predecessors, (175), 140 states have call successors, (175) [2021-12-17 21:03:02,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 2905 transitions. [2021-12-17 21:03:02,109 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 2905 transitions. Word has length 112 [2021-12-17 21:03:02,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:02,109 INFO L470 AbstractCegarLoop]: Abstraction has 1903 states and 2905 transitions. [2021-12-17 21:03:02,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-17 21:03:02,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 2905 transitions. [2021-12-17 21:03:02,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 21:03:02,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:02,111 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:02,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 21:03:02,111 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:02,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:02,113 INFO L85 PathProgramCache]: Analyzing trace with hash -574067360, now seen corresponding path program 1 times [2021-12-17 21:03:02,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:02,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357115665] [2021-12-17 21:03:02,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:02,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:02,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:03:02,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:02,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 21:03:02,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:02,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 21:03:02,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:02,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 21:03:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:02,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 21:03:02,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:02,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:02,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:02,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357115665] [2021-12-17 21:03:02,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357115665] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:02,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:02,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:03:02,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609480802] [2021-12-17 21:03:02,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:02,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:03:02,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:02,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:03:02,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:03:02,195 INFO L87 Difference]: Start difference. First operand 1903 states and 2905 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-17 21:03:02,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:02,914 INFO L93 Difference]: Finished difference Result 4416 states and 6836 transitions. [2021-12-17 21:03:02,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:03:02,914 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 112 [2021-12-17 21:03:02,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:02,926 INFO L225 Difference]: With dead ends: 4416 [2021-12-17 21:03:02,926 INFO L226 Difference]: Without dead ends: 2528 [2021-12-17 21:03:02,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:03:02,931 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 625 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:02,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [639 Valid, 891 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 21:03:02,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2021-12-17 21:03:03,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 1903. [2021-12-17 21:03:03,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1903 states, 1700 states have (on average 1.5182352941176471) internal successors, (2581), 1709 states have internal predecessors, (2581), 140 states have call successors, (140), 54 states have call predecessors, (140), 62 states have return successors, (175), 147 states have call predecessors, (175), 140 states have call successors, (175) [2021-12-17 21:03:03,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 2896 transitions. [2021-12-17 21:03:03,018 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 2896 transitions. Word has length 112 [2021-12-17 21:03:03,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:03,019 INFO L470 AbstractCegarLoop]: Abstraction has 1903 states and 2896 transitions. [2021-12-17 21:03:03,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-17 21:03:03,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 2896 transitions. [2021-12-17 21:03:03,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 21:03:03,020 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:03,021 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:03,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 21:03:03,021 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:03,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:03,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1568761058, now seen corresponding path program 1 times [2021-12-17 21:03:03,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:03,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558769061] [2021-12-17 21:03:03,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:03,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:03,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:03,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:03:03,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:03,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 21:03:03,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:03,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 21:03:03,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:03,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 21:03:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:03,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 21:03:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:03,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:03,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:03,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558769061] [2021-12-17 21:03:03,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558769061] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:03,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:03,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:03:03,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622558456] [2021-12-17 21:03:03,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:03,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:03:03,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:03,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:03:03,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:03:03,092 INFO L87 Difference]: Start difference. First operand 1903 states and 2896 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-17 21:03:04,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:04,552 INFO L93 Difference]: Finished difference Result 7192 states and 11047 transitions. [2021-12-17 21:03:04,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 21:03:04,552 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 112 [2021-12-17 21:03:04,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:04,585 INFO L225 Difference]: With dead ends: 7192 [2021-12-17 21:03:04,585 INFO L226 Difference]: Without dead ends: 5304 [2021-12-17 21:03:04,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 21:03:04,592 INFO L933 BasicCegarLoop]: 531 mSDtfsCounter, 1062 mSDsluCounter, 1142 mSDsCounter, 0 mSdLazyCounter, 1611 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1082 SdHoareTripleChecker+Valid, 1673 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:04,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1082 Valid, 1673 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1611 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 21:03:04,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5304 states. [2021-12-17 21:03:04,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5304 to 3530. [2021-12-17 21:03:04,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3530 states, 3159 states have (on average 1.5140867363089585) internal successors, (4783), 3176 states have internal predecessors, (4783), 252 states have call successors, (252), 102 states have call predecessors, (252), 118 states have return successors, (349), 267 states have call predecessors, (349), 252 states have call successors, (349) [2021-12-17 21:03:04,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3530 states to 3530 states and 5384 transitions. [2021-12-17 21:03:04,766 INFO L78 Accepts]: Start accepts. Automaton has 3530 states and 5384 transitions. Word has length 112 [2021-12-17 21:03:04,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:04,767 INFO L470 AbstractCegarLoop]: Abstraction has 3530 states and 5384 transitions. [2021-12-17 21:03:04,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-17 21:03:04,767 INFO L276 IsEmpty]: Start isEmpty. Operand 3530 states and 5384 transitions. [2021-12-17 21:03:04,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 21:03:04,769 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:04,769 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:04,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 21:03:04,769 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:04,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:04,770 INFO L85 PathProgramCache]: Analyzing trace with hash 2139930016, now seen corresponding path program 1 times [2021-12-17 21:03:04,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:04,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483864331] [2021-12-17 21:03:04,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:04,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:04,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:04,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:03:04,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:04,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 21:03:04,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:04,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 21:03:04,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:04,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 21:03:04,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:04,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 21:03:04,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:04,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:04,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:04,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483864331] [2021-12-17 21:03:04,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483864331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:04,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:04,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:03:04,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427337114] [2021-12-17 21:03:04,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:04,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:03:04,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:04,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:03:04,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:03:04,840 INFO L87 Difference]: Start difference. First operand 3530 states and 5384 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-17 21:03:06,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:06,513 INFO L93 Difference]: Finished difference Result 13393 states and 20605 transitions. [2021-12-17 21:03:06,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 21:03:06,514 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 112 [2021-12-17 21:03:06,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:06,549 INFO L225 Difference]: With dead ends: 13393 [2021-12-17 21:03:06,550 INFO L226 Difference]: Without dead ends: 9878 [2021-12-17 21:03:06,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 21:03:06,563 INFO L933 BasicCegarLoop]: 392 mSDtfsCounter, 1076 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 1434 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 1550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:06,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1096 Valid, 1161 Invalid, 1550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1434 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 21:03:06,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9878 states. [2021-12-17 21:03:06,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9878 to 6811. [2021-12-17 21:03:06,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6811 states, 6112 states have (on average 1.513252617801047) internal successors, (9249), 6145 states have internal predecessors, (9249), 468 states have call successors, (468), 198 states have call predecessors, (468), 230 states have return successors, (743), 499 states have call predecessors, (743), 468 states have call successors, (743) [2021-12-17 21:03:06,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6811 states to 6811 states and 10460 transitions. [2021-12-17 21:03:06,940 INFO L78 Accepts]: Start accepts. Automaton has 6811 states and 10460 transitions. Word has length 112 [2021-12-17 21:03:06,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:06,941 INFO L470 AbstractCegarLoop]: Abstraction has 6811 states and 10460 transitions. [2021-12-17 21:03:06,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-17 21:03:06,942 INFO L276 IsEmpty]: Start isEmpty. Operand 6811 states and 10460 transitions. [2021-12-17 21:03:06,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 21:03:06,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:06,946 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:06,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 21:03:06,946 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:06,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:06,946 INFO L85 PathProgramCache]: Analyzing trace with hash 181355230, now seen corresponding path program 1 times [2021-12-17 21:03:06,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:06,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896374116] [2021-12-17 21:03:06,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:06,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:06,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:06,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:03:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:06,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 21:03:06,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:07,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 21:03:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:07,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 21:03:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:07,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 21:03:07,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:07,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:07,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896374116] [2021-12-17 21:03:07,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896374116] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:07,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:07,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:03:07,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97999945] [2021-12-17 21:03:07,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:07,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:03:07,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:07,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:03:07,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:03:07,036 INFO L87 Difference]: Start difference. First operand 6811 states and 10460 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-17 21:03:08,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:08,059 INFO L93 Difference]: Finished difference Result 15544 states and 24169 transitions. [2021-12-17 21:03:08,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:03:08,059 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 112 [2021-12-17 21:03:08,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:08,084 INFO L225 Difference]: With dead ends: 15544 [2021-12-17 21:03:08,084 INFO L226 Difference]: Without dead ends: 8748 [2021-12-17 21:03:08,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:03:08,100 INFO L933 BasicCegarLoop]: 327 mSDtfsCounter, 626 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:08,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [640 Valid, 877 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 21:03:08,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8748 states. [2021-12-17 21:03:08,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8748 to 6811. [2021-12-17 21:03:08,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6811 states, 6112 states have (on average 1.5078534031413613) internal successors, (9216), 6145 states have internal predecessors, (9216), 468 states have call successors, (468), 198 states have call predecessors, (468), 230 states have return successors, (743), 499 states have call predecessors, (743), 468 states have call successors, (743) [2021-12-17 21:03:08,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6811 states to 6811 states and 10427 transitions. [2021-12-17 21:03:08,466 INFO L78 Accepts]: Start accepts. Automaton has 6811 states and 10427 transitions. Word has length 112 [2021-12-17 21:03:08,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:08,467 INFO L470 AbstractCegarLoop]: Abstraction has 6811 states and 10427 transitions. [2021-12-17 21:03:08,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-17 21:03:08,467 INFO L276 IsEmpty]: Start isEmpty. Operand 6811 states and 10427 transitions. [2021-12-17 21:03:08,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 21:03:08,471 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:08,471 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:08,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 21:03:08,471 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:08,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:08,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1697775716, now seen corresponding path program 1 times [2021-12-17 21:03:08,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:08,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694538135] [2021-12-17 21:03:08,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:08,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:08,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:08,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:03:08,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:08,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 21:03:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:08,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 21:03:08,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:08,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 21:03:08,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:08,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 21:03:08,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:08,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:08,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:08,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694538135] [2021-12-17 21:03:08,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694538135] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:08,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:08,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:03:08,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390291794] [2021-12-17 21:03:08,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:08,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:03:08,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:08,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:03:08,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:03:08,562 INFO L87 Difference]: Start difference. First operand 6811 states and 10427 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-17 21:03:10,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:10,789 INFO L93 Difference]: Finished difference Result 24636 states and 38055 transitions. [2021-12-17 21:03:10,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 21:03:10,789 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 112 [2021-12-17 21:03:10,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:10,837 INFO L225 Difference]: With dead ends: 24636 [2021-12-17 21:03:10,837 INFO L226 Difference]: Without dead ends: 17840 [2021-12-17 21:03:10,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 21:03:10,857 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 853 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 1703 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 1683 SdHoareTripleChecker+Invalid, 1786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:10,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 1683 Invalid, 1786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1703 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 21:03:10,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17840 states. [2021-12-17 21:03:11,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17840 to 13422. [2021-12-17 21:03:11,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13422 states, 12083 states have (on average 1.5087312753455269) internal successors, (18230), 12148 states have internal predecessors, (18230), 884 states have call successors, (884), 390 states have call predecessors, (884), 454 states have return successors, (1677), 947 states have call predecessors, (1677), 884 states have call successors, (1677) [2021-12-17 21:03:11,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13422 states to 13422 states and 20791 transitions. [2021-12-17 21:03:11,571 INFO L78 Accepts]: Start accepts. Automaton has 13422 states and 20791 transitions. Word has length 112 [2021-12-17 21:03:11,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:11,571 INFO L470 AbstractCegarLoop]: Abstraction has 13422 states and 20791 transitions. [2021-12-17 21:03:11,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-17 21:03:11,572 INFO L276 IsEmpty]: Start isEmpty. Operand 13422 states and 20791 transitions. [2021-12-17 21:03:11,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 21:03:11,579 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:11,579 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:11,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 21:03:11,580 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:11,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:11,580 INFO L85 PathProgramCache]: Analyzing trace with hash -372919522, now seen corresponding path program 1 times [2021-12-17 21:03:11,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:11,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341022967] [2021-12-17 21:03:11,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:11,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:11,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:11,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:03:11,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:11,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 21:03:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:11,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 21:03:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:11,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 21:03:11,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:11,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 21:03:11,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:11,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:11,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:11,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341022967] [2021-12-17 21:03:11,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341022967] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:11,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:11,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:03:11,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432965546] [2021-12-17 21:03:11,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:11,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:03:11,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:11,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:03:11,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:03:11,646 INFO L87 Difference]: Start difference. First operand 13422 states and 20791 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-17 21:03:13,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:13,432 INFO L93 Difference]: Finished difference Result 30330 states and 47580 transitions. [2021-12-17 21:03:13,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:03:13,434 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 112 [2021-12-17 21:03:13,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:13,491 INFO L225 Difference]: With dead ends: 30330 [2021-12-17 21:03:13,492 INFO L226 Difference]: Without dead ends: 16923 [2021-12-17 21:03:13,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:03:13,546 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 625 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:13,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [639 Valid, 871 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 21:03:13,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16923 states. [2021-12-17 21:03:14,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16923 to 13422. [2021-12-17 21:03:14,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13422 states, 12083 states have (on average 1.5033518166018374) internal successors, (18165), 12148 states have internal predecessors, (18165), 884 states have call successors, (884), 390 states have call predecessors, (884), 454 states have return successors, (1677), 947 states have call predecessors, (1677), 884 states have call successors, (1677) [2021-12-17 21:03:14,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13422 states to 13422 states and 20726 transitions. [2021-12-17 21:03:14,530 INFO L78 Accepts]: Start accepts. Automaton has 13422 states and 20726 transitions. Word has length 112 [2021-12-17 21:03:14,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:14,530 INFO L470 AbstractCegarLoop]: Abstraction has 13422 states and 20726 transitions. [2021-12-17 21:03:14,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-17 21:03:14,531 INFO L276 IsEmpty]: Start isEmpty. Operand 13422 states and 20726 transitions. [2021-12-17 21:03:14,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 21:03:14,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:14,538 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:14,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-17 21:03:14,538 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:14,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:14,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1193838428, now seen corresponding path program 1 times [2021-12-17 21:03:14,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:14,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041652969] [2021-12-17 21:03:14,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:14,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:14,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:14,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:03:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:14,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 21:03:14,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:14,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 21:03:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:14,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 21:03:14,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:14,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 21:03:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:14,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:14,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:14,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041652969] [2021-12-17 21:03:14,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041652969] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:14,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:14,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:03:14,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248095524] [2021-12-17 21:03:14,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:14,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:03:14,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:14,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:03:14,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:03:14,620 INFO L87 Difference]: Start difference. First operand 13422 states and 20726 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-17 21:03:17,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:17,080 INFO L93 Difference]: Finished difference Result 38062 states and 58197 transitions. [2021-12-17 21:03:17,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 21:03:17,081 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 112 [2021-12-17 21:03:17,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:17,169 INFO L225 Difference]: With dead ends: 38062 [2021-12-17 21:03:17,169 INFO L226 Difference]: Without dead ends: 24656 [2021-12-17 21:03:17,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-12-17 21:03:17,198 INFO L933 BasicCegarLoop]: 342 mSDtfsCounter, 642 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:17,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [642 Valid, 1222 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 21:03:17,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24656 states. [2021-12-17 21:03:18,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24656 to 13617. [2021-12-17 21:03:18,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13617 states, 12278 states have (on average 1.495357550089591) internal successors, (18360), 12343 states have internal predecessors, (18360), 884 states have call successors, (884), 390 states have call predecessors, (884), 454 states have return successors, (1677), 947 states have call predecessors, (1677), 884 states have call successors, (1677) [2021-12-17 21:03:18,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13617 states to 13617 states and 20921 transitions. [2021-12-17 21:03:18,128 INFO L78 Accepts]: Start accepts. Automaton has 13617 states and 20921 transitions. Word has length 112 [2021-12-17 21:03:18,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:18,128 INFO L470 AbstractCegarLoop]: Abstraction has 13617 states and 20921 transitions. [2021-12-17 21:03:18,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-17 21:03:18,131 INFO L276 IsEmpty]: Start isEmpty. Operand 13617 states and 20921 transitions. [2021-12-17 21:03:18,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 21:03:18,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:18,139 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:18,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-17 21:03:18,139 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:18,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:18,139 INFO L85 PathProgramCache]: Analyzing trace with hash -717204130, now seen corresponding path program 1 times [2021-12-17 21:03:18,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:18,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907383465] [2021-12-17 21:03:18,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:18,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:18,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:18,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:03:18,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:18,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 21:03:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:18,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 21:03:18,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:18,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 21:03:18,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:18,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 21:03:18,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:18,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:03:18,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:18,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907383465] [2021-12-17 21:03:18,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907383465] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:18,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:18,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:03:18,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296728589] [2021-12-17 21:03:18,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:18,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:03:18,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:18,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:03:18,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:03:18,268 INFO L87 Difference]: Start difference. First operand 13617 states and 20921 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-17 21:03:23,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:23,014 INFO L93 Difference]: Finished difference Result 62784 states and 98605 transitions. [2021-12-17 21:03:23,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 21:03:23,015 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 112 [2021-12-17 21:03:23,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:23,183 INFO L225 Difference]: With dead ends: 62784 [2021-12-17 21:03:23,184 INFO L226 Difference]: Without dead ends: 49183 [2021-12-17 21:03:23,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-12-17 21:03:23,237 INFO L933 BasicCegarLoop]: 708 mSDtfsCounter, 2091 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2120 SdHoareTripleChecker+Valid, 1648 SdHoareTripleChecker+Invalid, 2077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 1775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:23,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2120 Valid, 1648 Invalid, 2077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 1775 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-17 21:03:23,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49183 states. [2021-12-17 21:03:25,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49183 to 39718. [2021-12-17 21:03:25,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39718 states, 35707 states have (on average 1.4897919175511805) internal successors, (53196), 35999 states have internal predecessors, (53196), 2642 states have call successors, (2642), 1176 states have call predecessors, (2642), 1368 states have return successors, (5434), 2606 states have call predecessors, (5434), 2642 states have call successors, (5434) [2021-12-17 21:03:25,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39718 states to 39718 states and 61272 transitions. [2021-12-17 21:03:25,473 INFO L78 Accepts]: Start accepts. Automaton has 39718 states and 61272 transitions. Word has length 112 [2021-12-17 21:03:25,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:25,473 INFO L470 AbstractCegarLoop]: Abstraction has 39718 states and 61272 transitions. [2021-12-17 21:03:25,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-17 21:03:25,473 INFO L276 IsEmpty]: Start isEmpty. Operand 39718 states and 61272 transitions. [2021-12-17 21:03:25,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-12-17 21:03:25,536 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:25,536 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:25,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-17 21:03:25,536 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:25,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:25,537 INFO L85 PathProgramCache]: Analyzing trace with hash -339553019, now seen corresponding path program 1 times [2021-12-17 21:03:25,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:25,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047934183] [2021-12-17 21:03:25,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:25,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:25,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:25,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:03:25,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:25,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 21:03:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:25,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 21:03:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:25,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 21:03:25,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:25,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 21:03:25,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:25,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 21:03:25,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:25,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 21:03:25,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:25,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-17 21:03:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:25,627 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-17 21:03:25,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:25,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047934183] [2021-12-17 21:03:25,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047934183] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:03:25,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931798479] [2021-12-17 21:03:25,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:25,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:03:25,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:03:25,637 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) [2021-12-17 21:03:25,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 21:03:25,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:25,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 21:03:25,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:03:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-17 21:03:26,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:03:26,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931798479] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:26,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:03:26,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 21:03:26,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110498187] [2021-12-17 21:03:26,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:26,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:03:26,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:26,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:03:26,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:03:26,002 INFO L87 Difference]: Start difference. First operand 39718 states and 61272 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 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) [2021-12-17 21:03:30,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:30,259 INFO L93 Difference]: Finished difference Result 118141 states and 184179 transitions. [2021-12-17 21:03:30,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:03:30,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 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 182 [2021-12-17 21:03:30,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:30,615 INFO L225 Difference]: With dead ends: 118141 [2021-12-17 21:03:30,616 INFO L226 Difference]: Without dead ends: 78439 [2021-12-17 21:03:30,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:03:30,706 INFO L933 BasicCegarLoop]: 355 mSDtfsCounter, 287 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 665 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 [2021-12-17 21:03:30,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 665 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:03:30,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78439 states. [2021-12-17 21:03:35,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78439 to 78045. [2021-12-17 21:03:35,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78045 states, 70224 states have (on average 1.4896331738437) internal successors, (104608), 70807 states have internal predecessors, (104608), 5084 states have call successors, (5084), 2352 states have call predecessors, (5084), 2736 states have return successors, (10506), 4949 states have call predecessors, (10506), 5084 states have call successors, (10506) [2021-12-17 21:03:35,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78045 states to 78045 states and 120198 transitions. [2021-12-17 21:03:35,742 INFO L78 Accepts]: Start accepts. Automaton has 78045 states and 120198 transitions. Word has length 182 [2021-12-17 21:03:35,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:35,743 INFO L470 AbstractCegarLoop]: Abstraction has 78045 states and 120198 transitions. [2021-12-17 21:03:35,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 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) [2021-12-17 21:03:35,743 INFO L276 IsEmpty]: Start isEmpty. Operand 78045 states and 120198 transitions. [2021-12-17 21:03:35,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-12-17 21:03:35,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:35,859 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:03:35,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-17 21:03:36,076 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,SelfDestructingSolverStorable24 [2021-12-17 21:03:36,076 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:36,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:36,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1859697445, now seen corresponding path program 1 times [2021-12-17 21:03:36,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:36,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082383362] [2021-12-17 21:03:36,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:36,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:36,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:03:36,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:36,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 21:03:36,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:36,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 21:03:36,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:36,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 21:03:36,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:36,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 21:03:36,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:36,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 21:03:36,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:36,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 21:03:36,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:36,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-17 21:03:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:36,163 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-17 21:03:36,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:36,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082383362] [2021-12-17 21:03:36,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082383362] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:03:36,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729485939] [2021-12-17 21:03:36,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:36,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:03:36,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:03:36,165 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) [2021-12-17 21:03:36,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 21:03:36,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:36,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 21:03:36,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:03:36,563 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 21:03:36,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:03:36,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729485939] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:36,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:03:36,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 21:03:36,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860346250] [2021-12-17 21:03:36,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:36,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:03:36,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:36,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:03:36,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:03:36,569 INFO L87 Difference]: Start difference. First operand 78045 states and 120198 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 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)