./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.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.12.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 cb07c62e0c8f9c002ab72b797de071664dce20871b109c1b4c0b79acbb73493c --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 21:03:38,882 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 21:03:38,885 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 21:03:38,932 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 21:03:38,933 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 21:03:38,936 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 21:03:38,937 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 21:03:38,942 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 21:03:38,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 21:03:38,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 21:03:38,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 21:03:38,950 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 21:03:38,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 21:03:38,952 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 21:03:38,954 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 21:03:38,957 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 21:03:38,958 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 21:03:38,959 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 21:03:38,961 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 21:03:38,965 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 21:03:38,967 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 21:03:38,968 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 21:03:38,969 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 21:03:38,970 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 21:03:38,975 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 21:03:38,976 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 21:03:38,976 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 21:03:38,977 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 21:03:38,978 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 21:03:38,979 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 21:03:38,979 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 21:03:38,980 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 21:03:38,981 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 21:03:38,982 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 21:03:38,983 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 21:03:38,983 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 21:03:38,984 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 21:03:38,984 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 21:03:38,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 21:03:38,985 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 21:03:38,985 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 21:03:38,987 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 21:03:39,022 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 21:03:39,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 21:03:39,023 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 21:03:39,023 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 21:03:39,025 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 21:03:39,025 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 21:03:39,025 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 21:03:39,025 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 21:03:39,026 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 21:03:39,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 21:03:39,027 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 21:03:39,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 21:03:39,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 21:03:39,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 21:03:39,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 21:03:39,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 21:03:39,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 21:03:39,028 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 21:03:39,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 21:03:39,028 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 21:03:39,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 21:03:39,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 21:03:39,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 21:03:39,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 21:03:39,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:03:39,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 21:03:39,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 21:03:39,031 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 21:03:39,031 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 21:03:39,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 21:03:39,032 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 21:03:39,032 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 21:03:39,032 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 21:03:39,032 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 21:03:39,033 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb07c62e0c8f9c002ab72b797de071664dce20871b109c1b4c0b79acbb73493c [2021-12-17 21:03:39,252 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 21:03:39,274 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 21:03:39,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 21:03:39,277 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 21:03:39,277 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 21:03:39,278 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-2.c [2021-12-17 21:03:39,352 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f43640e1c/9733dce6430a49d8bb14078daafe9494/FLAG1723b58eb [2021-12-17 21:03:39,801 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 21:03:39,805 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-2.c [2021-12-17 21:03:39,823 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f43640e1c/9733dce6430a49d8bb14078daafe9494/FLAG1723b58eb [2021-12-17 21:03:40,137 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f43640e1c/9733dce6430a49d8bb14078daafe9494 [2021-12-17 21:03:40,140 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 21:03:40,141 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 21:03:40,143 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 21:03:40,143 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 21:03:40,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 21:03:40,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:03:40" (1/1) ... [2021-12-17 21:03:40,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@377d5432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:40, skipping insertion in model container [2021-12-17 21:03:40,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:03:40" (1/1) ... [2021-12-17 21:03:40,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 21:03:40,208 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 21:03:40,360 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.12.cil-2.c[913,926] [2021-12-17 21:03:40,392 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.12.cil-2.c[5977,5990] [2021-12-17 21:03:40,513 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:03:40,530 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 21:03:40,542 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.12.cil-2.c[913,926] [2021-12-17 21:03:40,570 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.12.cil-2.c[5977,5990] [2021-12-17 21:03:40,616 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:03:40,652 INFO L208 MainTranslator]: Completed translation [2021-12-17 21:03:40,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:40 WrapperNode [2021-12-17 21:03:40,652 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 21:03:40,653 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 21:03:40,653 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 21:03:40,653 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 21:03:40,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:40" (1/1) ... [2021-12-17 21:03:40,672 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:40" (1/1) ... [2021-12-17 21:03:40,729 INFO L137 Inliner]: procedures = 72, calls = 84, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 1055 [2021-12-17 21:03:40,729 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 21:03:40,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 21:03:40,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 21:03:40,731 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 21:03:40,739 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:40" (1/1) ... [2021-12-17 21:03:40,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:40" (1/1) ... [2021-12-17 21:03:40,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:40" (1/1) ... [2021-12-17 21:03:40,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:40" (1/1) ... [2021-12-17 21:03:40,756 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:40" (1/1) ... [2021-12-17 21:03:40,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:40" (1/1) ... [2021-12-17 21:03:40,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:40" (1/1) ... [2021-12-17 21:03:40,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 21:03:40,784 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 21:03:40,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 21:03:40,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 21:03:40,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:40" (1/1) ... [2021-12-17 21:03:40,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:03:40,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:03:40,822 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 21:03:40,842 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 21:03:40,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 21:03:40,870 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-17 21:03:40,871 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-17 21:03:40,871 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-17 21:03:40,872 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-17 21:03:40,872 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-17 21:03:40,872 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-17 21:03:40,872 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-17 21:03:40,872 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-17 21:03:40,873 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-17 21:03:40,873 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-17 21:03:40,873 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-17 21:03:40,873 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-17 21:03:40,873 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-17 21:03:40,873 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-17 21:03:40,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 21:03:40,873 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-17 21:03:40,874 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-17 21:03:40,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 21:03:40,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 21:03:40,874 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-17 21:03:40,874 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-17 21:03:41,034 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 21:03:41,035 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 21:03:41,792 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 21:03:41,806 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 21:03:41,807 INFO L301 CfgBuilder]: Removed 19 assume(true) statements. [2021-12-17 21:03:41,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:03:41 BoogieIcfgContainer [2021-12-17 21:03:41,809 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 21:03:41,810 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 21:03:41,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 21:03:41,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 21:03:41,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 09:03:40" (1/3) ... [2021-12-17 21:03:41,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@197133ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:03:41, skipping insertion in model container [2021-12-17 21:03:41,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:03:40" (2/3) ... [2021-12-17 21:03:41,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@197133ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:03:41, skipping insertion in model container [2021-12-17 21:03:41,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:03:41" (3/3) ... [2021-12-17 21:03:41,816 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.12.cil-2.c [2021-12-17 21:03:41,821 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 21:03:41,821 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 21:03:41,855 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 21:03:41,860 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 21:03:41,860 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 21:03:41,882 INFO L276 IsEmpty]: Start isEmpty. Operand has 454 states, 410 states have (on average 1.648780487804878) internal successors, (676), 415 states have internal predecessors, (676), 32 states have call successors, (32), 9 states have call predecessors, (32), 9 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-17 21:03:41,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-17 21:03:41,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:41,889 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 21:03:41,890 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:41,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:41,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1427645478, now seen corresponding path program 1 times [2021-12-17 21:03:41,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:41,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857201471] [2021-12-17 21:03:41,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:41,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:42,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:42,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:03:42,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:42,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 21:03:42,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:42,163 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 21:03:42,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:42,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857201471] [2021-12-17 21:03:42,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857201471] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:42,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:42,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:03:42,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327359542] [2021-12-17 21:03:42,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:42,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:03:42,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:42,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:03:42,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:03:42,206 INFO L87 Difference]: Start difference. First operand has 454 states, 410 states have (on average 1.648780487804878) internal successors, (676), 415 states have internal predecessors, (676), 32 states have call successors, (32), 9 states have call predecessors, (32), 9 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) 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 21:03:42,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:42,552 INFO L93 Difference]: Finished difference Result 953 states and 1548 transitions. [2021-12-17 21:03:42,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:03:42,555 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 21:03:42,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:42,573 INFO L225 Difference]: With dead ends: 953 [2021-12-17 21:03:42,573 INFO L226 Difference]: Without dead ends: 514 [2021-12-17 21:03:42,580 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 21:03:42,584 INFO L933 BasicCegarLoop]: 705 mSDtfsCounter, 944 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:42,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [970 Valid, 1120 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 21:03:42,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-12-17 21:03:42,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 508. [2021-12-17 21:03:42,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 459 states have (on average 1.5315904139433552) internal successors, (703), 463 states have internal predecessors, (703), 36 states have call successors, (36), 11 states have call predecessors, (36), 11 states have return successors, (40), 34 states have call predecessors, (40), 34 states have call successors, (40) [2021-12-17 21:03:42,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 779 transitions. [2021-12-17 21:03:42,667 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 779 transitions. Word has length 44 [2021-12-17 21:03:42,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:42,668 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 779 transitions. [2021-12-17 21:03:42,668 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 21:03:42,668 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 779 transitions. [2021-12-17 21:03:42,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 21:03:42,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:42,671 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 21:03:42,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 21:03:42,672 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:42,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:42,673 INFO L85 PathProgramCache]: Analyzing trace with hash 2087439571, now seen corresponding path program 1 times [2021-12-17 21:03:42,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:42,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007759714] [2021-12-17 21:03:42,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:42,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:42,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:42,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:03:42,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:42,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 21:03:42,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:42,748 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 21:03:42,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:42,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007759714] [2021-12-17 21:03:42,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007759714] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:42,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:42,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:03:42,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165601228] [2021-12-17 21:03:42,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:42,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:03:42,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:42,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:03:42,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:03:42,751 INFO L87 Difference]: Start difference. First operand 508 states and 779 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 21:03:43,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:43,247 INFO L93 Difference]: Finished difference Result 756 states and 1119 transitions. [2021-12-17 21:03:43,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:03:43,248 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 21:03:43,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:43,252 INFO L225 Difference]: With dead ends: 756 [2021-12-17 21:03:43,252 INFO L226 Difference]: Without dead ends: 632 [2021-12-17 21:03:43,253 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 21:03:43,254 INFO L933 BasicCegarLoop]: 734 mSDtfsCounter, 368 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 1476 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:43,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 1476 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 21:03:43,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-12-17 21:03:43,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 575. [2021-12-17 21:03:43,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 520 states have (on average 1.5134615384615384) internal successors, (787), 524 states have internal predecessors, (787), 39 states have call successors, (39), 14 states have call predecessors, (39), 14 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2021-12-17 21:03:43,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 869 transitions. [2021-12-17 21:03:43,282 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 869 transitions. Word has length 45 [2021-12-17 21:03:43,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:43,282 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 869 transitions. [2021-12-17 21:03:43,282 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 21:03:43,283 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 869 transitions. [2021-12-17 21:03:43,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 21:03:43,284 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:43,285 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 21:03:43,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 21:03:43,285 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:43,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:43,286 INFO L85 PathProgramCache]: Analyzing trace with hash 803082110, now seen corresponding path program 1 times [2021-12-17 21:03:43,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:43,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904025661] [2021-12-17 21:03:43,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:43,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:43,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:43,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:03:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:43,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 21:03:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:43,368 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 21:03:43,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:43,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904025661] [2021-12-17 21:03:43,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904025661] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:43,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:43,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:03:43,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888340488] [2021-12-17 21:03:43,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:43,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:03:43,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:43,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:03:43,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:03:43,371 INFO L87 Difference]: Start difference. First operand 575 states and 869 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 21:03:43,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:43,550 INFO L93 Difference]: Finished difference Result 983 states and 1428 transitions. [2021-12-17 21:03:43,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:03:43,550 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 21:03:43,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:43,555 INFO L225 Difference]: With dead ends: 983 [2021-12-17 21:03:43,555 INFO L226 Difference]: Without dead ends: 792 [2021-12-17 21:03:43,556 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 21:03:43,557 INFO L933 BasicCegarLoop]: 709 mSDtfsCounter, 953 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:43,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [979 Valid, 1124 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 21:03:43,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-12-17 21:03:43,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 740. [2021-12-17 21:03:43,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 666 states have (on average 1.466966966966967) internal successors, (977), 673 states have internal predecessors, (977), 50 states have call successors, (50), 21 states have call predecessors, (50), 22 states have return successors, (60), 46 states have call predecessors, (60), 48 states have call successors, (60) [2021-12-17 21:03:43,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1087 transitions. [2021-12-17 21:03:43,586 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1087 transitions. Word has length 45 [2021-12-17 21:03:43,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:43,586 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 1087 transitions. [2021-12-17 21:03:43,586 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 21:03:43,587 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1087 transitions. [2021-12-17 21:03:43,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-17 21:03:43,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:43,589 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 21:03:43,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 21:03:43,590 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:43,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:43,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1436949354, now seen corresponding path program 1 times [2021-12-17 21:03:43,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:43,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452445803] [2021-12-17 21:03:43,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:43,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:43,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:43,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:03:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:43,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 21:03:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:43,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-17 21:03:43,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:43,677 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 21:03:43,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:43,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452445803] [2021-12-17 21:03:43,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452445803] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:43,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:43,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:03:43,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105985326] [2021-12-17 21:03:43,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:43,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:03:43,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:43,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:03:43,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:03:43,680 INFO L87 Difference]: Start difference. First operand 740 states and 1087 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 21:03:44,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:44,106 INFO L93 Difference]: Finished difference Result 1324 states and 1872 transitions. [2021-12-17 21:03:44,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:03:44,107 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 21:03:44,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:44,112 INFO L225 Difference]: With dead ends: 1324 [2021-12-17 21:03:44,112 INFO L226 Difference]: Without dead ends: 968 [2021-12-17 21:03:44,113 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 21:03:44,124 INFO L933 BasicCegarLoop]: 758 mSDtfsCounter, 352 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 1503 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:44,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 1503 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 21:03:44,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-12-17 21:03:44,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 930. [2021-12-17 21:03:44,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 832 states have (on average 1.4146634615384615) internal successors, (1177), 841 states have internal predecessors, (1177), 64 states have call successors, (64), 29 states have call predecessors, (64), 32 states have return successors, (84), 60 states have call predecessors, (84), 62 states have call successors, (84) [2021-12-17 21:03:44,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1325 transitions. [2021-12-17 21:03:44,164 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1325 transitions. Word has length 62 [2021-12-17 21:03:44,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:44,164 INFO L470 AbstractCegarLoop]: Abstraction has 930 states and 1325 transitions. [2021-12-17 21:03:44,164 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 21:03:44,165 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1325 transitions. [2021-12-17 21:03:44,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 21:03:44,167 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:44,167 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 21:03:44,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 21:03:44,167 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:44,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:44,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1474560009, now seen corresponding path program 1 times [2021-12-17 21:03:44,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:44,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642582981] [2021-12-17 21:03:44,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:44,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:44,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:03:44,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:44,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:03:44,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:44,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-17 21:03:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:44,219 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 21:03:44,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:44,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642582981] [2021-12-17 21:03:44,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642582981] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:44,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:44,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 21:03:44,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436750972] [2021-12-17 21:03:44,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:44,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:03:44,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:44,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:03:44,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 21:03:44,222 INFO L87 Difference]: Start difference. First operand 930 states and 1325 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 21:03:44,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:44,392 INFO L93 Difference]: Finished difference Result 1583 states and 2178 transitions. [2021-12-17 21:03:44,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:03:44,393 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 21:03:44,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:44,398 INFO L225 Difference]: With dead ends: 1583 [2021-12-17 21:03:44,398 INFO L226 Difference]: Without dead ends: 1129 [2021-12-17 21:03:44,399 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 21:03:44,400 INFO L933 BasicCegarLoop]: 704 mSDtfsCounter, 940 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:44,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [966 Valid, 1121 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 21:03:44,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2021-12-17 21:03:44,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 1074. [2021-12-17 21:03:44,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 960 states have (on average 1.3833333333333333) internal successors, (1328), 971 states have internal predecessors, (1328), 72 states have call successors, (72), 35 states have call predecessors, (72), 40 states have return successors, (98), 68 states have call predecessors, (98), 70 states have call successors, (98) [2021-12-17 21:03:44,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1498 transitions. [2021-12-17 21:03:44,442 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1498 transitions. Word has length 67 [2021-12-17 21:03:44,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:44,443 INFO L470 AbstractCegarLoop]: Abstraction has 1074 states and 1498 transitions. [2021-12-17 21:03:44,443 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 21:03:44,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1498 transitions. [2021-12-17 21:03:44,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 21:03:44,445 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:44,445 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 21:03:44,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 21:03:44,446 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:44,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:44,447 INFO L85 PathProgramCache]: Analyzing trace with hash 132320028, now seen corresponding path program 1 times [2021-12-17 21:03:44,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:44,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950213398] [2021-12-17 21:03:44,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:44,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:44,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:44,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:03:44,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:44,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:03:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:44,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:03:44,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:44,556 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 21:03:44,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:44,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950213398] [2021-12-17 21:03:44,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950213398] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:03:44,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129952030] [2021-12-17 21:03:44,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:44,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:03:44,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:03:44,558 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 21:03:44,563 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 21:03:44,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:44,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 21:03:44,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:03:45,054 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 21:03:45,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 21:03:45,159 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 21:03:45,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129952030] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 21:03:45,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 21:03:45,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-12-17 21:03:45,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453038579] [2021-12-17 21:03:45,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:45,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:03:45,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:45,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:03:45,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:03:45,162 INFO L87 Difference]: Start difference. First operand 1074 states and 1498 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 21:03:45,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:45,304 INFO L93 Difference]: Finished difference Result 1130 states and 1566 transitions. [2021-12-17 21:03:45,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 21:03:45,305 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 21:03:45,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:45,310 INFO L225 Difference]: With dead ends: 1130 [2021-12-17 21:03:45,310 INFO L226 Difference]: Without dead ends: 1127 [2021-12-17 21:03:45,311 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 21:03:45,312 INFO L933 BasicCegarLoop]: 713 mSDtfsCounter, 1259 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1259 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:45,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1259 Valid, 780 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 21:03:45,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2021-12-17 21:03:45,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 1073. [2021-12-17 21:03:45,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 960 states have (on average 1.38125) internal successors, (1326), 970 states have internal predecessors, (1326), 71 states have call successors, (71), 35 states have call predecessors, (71), 40 states have return successors, (98), 68 states have call predecessors, (98), 70 states have call successors, (98) [2021-12-17 21:03:45,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1495 transitions. [2021-12-17 21:03:45,355 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1495 transitions. Word has length 68 [2021-12-17 21:03:45,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:45,357 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 1495 transitions. [2021-12-17 21:03:45,357 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 21:03:45,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1495 transitions. [2021-12-17 21:03:45,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-17 21:03:45,359 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:45,359 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 21:03:45,391 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 21:03:45,579 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 21:03:45,580 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:45,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:45,580 INFO L85 PathProgramCache]: Analyzing trace with hash -194439590, now seen corresponding path program 1 times [2021-12-17 21:03:45,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:45,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119748627] [2021-12-17 21:03:45,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:45,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:45,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:03:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:45,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:03:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:45,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:03:45,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:45,663 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 21:03:45,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:45,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119748627] [2021-12-17 21:03:45,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119748627] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:03:45,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354506726] [2021-12-17 21:03:45,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:45,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:03:45,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:03:45,666 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 21:03:45,690 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 21:03:45,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:45,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 21:03:45,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:03:46,117 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 21:03:46,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 21:03:46,241 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 21:03:46,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354506726] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 21:03:46,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 21:03:46,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-12-17 21:03:46,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165328416] [2021-12-17 21:03:46,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 21:03:46,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 21:03:46,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:46,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 21:03:46,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:03:46,246 INFO L87 Difference]: Start difference. First operand 1073 states and 1495 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 21:03:47,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:47,765 INFO L93 Difference]: Finished difference Result 2773 states and 3715 transitions. [2021-12-17 21:03:47,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-17 21:03:47,766 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 21:03:47,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:47,776 INFO L225 Difference]: With dead ends: 2773 [2021-12-17 21:03:47,776 INFO L226 Difference]: Without dead ends: 2229 [2021-12-17 21:03:47,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-12-17 21:03:47,782 INFO L933 BasicCegarLoop]: 818 mSDtfsCounter, 1905 mSDsluCounter, 3006 mSDsCounter, 0 mSdLazyCounter, 1804 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1938 SdHoareTripleChecker+Valid, 3824 SdHoareTripleChecker+Invalid, 1911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:47,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1938 Valid, 3824 Invalid, 1911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1804 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 21:03:47,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2229 states. [2021-12-17 21:03:47,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2229 to 1462. [2021-12-17 21:03:47,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1310 states have (on average 1.3435114503816794) internal successors, (1760), 1328 states have internal predecessors, (1760), 91 states have call successors, (91), 49 states have call predecessors, (91), 59 states have return successors, (132), 85 states have call predecessors, (132), 90 states have call successors, (132) [2021-12-17 21:03:47,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 1983 transitions. [2021-12-17 21:03:47,865 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 1983 transitions. Word has length 69 [2021-12-17 21:03:47,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:47,866 INFO L470 AbstractCegarLoop]: Abstraction has 1462 states and 1983 transitions. [2021-12-17 21:03:47,866 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 21:03:47,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 1983 transitions. [2021-12-17 21:03:47,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-17 21:03:47,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:47,869 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 21:03:47,897 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 21:03:48,083 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 21:03:48,084 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:48,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:48,084 INFO L85 PathProgramCache]: Analyzing trace with hash -939873926, now seen corresponding path program 1 times [2021-12-17 21:03:48,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:48,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010458484] [2021-12-17 21:03:48,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:48,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:48,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:48,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:03:48,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:48,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:03:48,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:48,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-17 21:03:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:48,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 21:03:48,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:48,215 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 21:03:48,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:48,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010458484] [2021-12-17 21:03:48,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010458484] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:03:48,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118107406] [2021-12-17 21:03:48,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:48,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:03:48,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:03:48,217 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 21:03:48,219 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 21:03:48,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:48,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 21:03:48,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:03:48,482 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 21:03:48,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:03:48,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118107406] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:48,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:03:48,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-17 21:03:48,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424531559] [2021-12-17 21:03:48,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:48,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:03:48,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:48,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:03:48,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:03:48,484 INFO L87 Difference]: Start difference. First operand 1462 states and 1983 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 21:03:48,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:48,536 INFO L93 Difference]: Finished difference Result 2185 states and 2921 transitions. [2021-12-17 21:03:48,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:03:48,537 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 21:03:48,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:48,542 INFO L225 Difference]: With dead ends: 2185 [2021-12-17 21:03:48,542 INFO L226 Difference]: Without dead ends: 1340 [2021-12-17 21:03:48,544 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 21:03:48,545 INFO L933 BasicCegarLoop]: 719 mSDtfsCounter, 648 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 794 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 21:03:48,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 794 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:03:48,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-12-17 21:03:48,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 1325. [2021-12-17 21:03:48,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1189 states have (on average 1.3473507148864592) internal successors, (1602), 1206 states have internal predecessors, (1602), 83 states have call successors, (83), 43 states have call predecessors, (83), 51 states have return successors, (118), 76 states have call predecessors, (118), 82 states have call successors, (118) [2021-12-17 21:03:48,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 1803 transitions. [2021-12-17 21:03:48,595 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 1803 transitions. Word has length 88 [2021-12-17 21:03:48,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:48,595 INFO L470 AbstractCegarLoop]: Abstraction has 1325 states and 1803 transitions. [2021-12-17 21:03:48,596 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 21:03:48,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 1803 transitions. [2021-12-17 21:03:48,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-17 21:03:48,599 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:48,599 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 21:03:48,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 21:03:48,815 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 21:03:48,816 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:48,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:48,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1556491019, now seen corresponding path program 1 times [2021-12-17 21:03:48,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:48,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789576568] [2021-12-17 21:03:48,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:48,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:48,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:48,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:03:48,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:48,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 21:03:48,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:48,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 21:03:48,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:48,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 21:03:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:48,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 21:03:48,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:48,903 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 21:03:48,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:48,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789576568] [2021-12-17 21:03:48,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789576568] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:03:48,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576211411] [2021-12-17 21:03:48,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:48,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:03:48,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:03:48,907 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 21:03:48,908 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 21:03:49,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:49,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 21:03:49,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:03:49,211 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 21:03:49,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:03:49,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576211411] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:49,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:03:49,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-17 21:03:49,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077974570] [2021-12-17 21:03:49,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:49,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:03:49,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:49,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:03:49,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:03:49,214 INFO L87 Difference]: Start difference. First operand 1325 states and 1803 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 21:03:49,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:49,252 INFO L93 Difference]: Finished difference Result 1704 states and 2271 transitions. [2021-12-17 21:03:49,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:03:49,253 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 21:03:49,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:49,255 INFO L225 Difference]: With dead ends: 1704 [2021-12-17 21:03:49,255 INFO L226 Difference]: Without dead ends: 378 [2021-12-17 21:03:49,257 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 21:03:49,258 INFO L933 BasicCegarLoop]: 733 mSDtfsCounter, 62 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1396 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 21:03:49,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 1396 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:03:49,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-12-17 21:03:49,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2021-12-17 21:03:49,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 345 states have (on average 1.5768115942028986) internal successors, (544), 346 states have internal predecessors, (544), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-17 21:03:49,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 596 transitions. [2021-12-17 21:03:49,272 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 596 transitions. Word has length 103 [2021-12-17 21:03:49,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:49,272 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 596 transitions. [2021-12-17 21:03:49,272 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 21:03:49,272 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 596 transitions. [2021-12-17 21:03:49,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-17 21:03:49,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:49,274 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:49,297 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 21:03:49,487 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 21:03:49,488 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:49,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:49,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1582396628, now seen corresponding path program 1 times [2021-12-17 21:03:49,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:49,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141697115] [2021-12-17 21:03:49,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:49,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:49,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:49,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:03:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:49,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:03:49,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:49,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:03:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:49,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:03:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:49,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:03:49,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:49,645 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 21:03:49,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:49,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141697115] [2021-12-17 21:03:49,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141697115] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:49,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:49,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 21:03:49,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887397157] [2021-12-17 21:03:49,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:49,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 21:03:49,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:49,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 21:03:49,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:03:49,647 INFO L87 Difference]: Start difference. First operand 378 states and 596 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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 21:03:50,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:50,980 INFO L93 Difference]: Finished difference Result 891 states and 1428 transitions. [2021-12-17 21:03:50,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 21:03:50,981 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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 178 [2021-12-17 21:03:50,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:50,983 INFO L225 Difference]: With dead ends: 891 [2021-12-17 21:03:50,984 INFO L226 Difference]: Without dead ends: 520 [2021-12-17 21:03:50,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:03:50,985 INFO L933 BasicCegarLoop]: 657 mSDtfsCounter, 1030 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1054 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:50,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1054 Valid, 1069 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 21:03:50,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-12-17 21:03:51,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 378. [2021-12-17 21:03:51,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 345 states have (on average 1.5739130434782609) internal successors, (543), 346 states have internal predecessors, (543), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-17 21:03:51,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 595 transitions. [2021-12-17 21:03:51,006 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 595 transitions. Word has length 178 [2021-12-17 21:03:51,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:51,006 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 595 transitions. [2021-12-17 21:03:51,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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 21:03:51,007 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 595 transitions. [2021-12-17 21:03:51,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-17 21:03:51,008 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:51,008 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:51,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 21:03:51,009 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:51,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:51,009 INFO L85 PathProgramCache]: Analyzing trace with hash -79298322, now seen corresponding path program 1 times [2021-12-17 21:03:51,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:51,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716978404] [2021-12-17 21:03:51,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:51,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:51,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:03:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:51,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:03:51,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:51,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:03:51,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:51,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:03:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:51,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:03:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:51,157 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 21:03:51,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:51,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716978404] [2021-12-17 21:03:51,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716978404] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:51,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:51,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 21:03:51,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847130334] [2021-12-17 21:03:51,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:51,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 21:03:51,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:51,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 21:03:51,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:03:51,159 INFO L87 Difference]: Start difference. First operand 378 states and 595 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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 21:03:52,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:52,410 INFO L93 Difference]: Finished difference Result 883 states and 1411 transitions. [2021-12-17 21:03:52,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 21:03:52,411 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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 178 [2021-12-17 21:03:52,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:52,424 INFO L225 Difference]: With dead ends: 883 [2021-12-17 21:03:52,425 INFO L226 Difference]: Without dead ends: 520 [2021-12-17 21:03:52,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:03:52,427 INFO L933 BasicCegarLoop]: 656 mSDtfsCounter, 1021 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1045 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:52,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1045 Valid, 1067 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 21:03:52,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-12-17 21:03:52,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 378. [2021-12-17 21:03:52,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 345 states have (on average 1.5710144927536231) internal successors, (542), 346 states have internal predecessors, (542), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-17 21:03:52,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 594 transitions. [2021-12-17 21:03:52,452 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 594 transitions. Word has length 178 [2021-12-17 21:03:52,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:52,452 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 594 transitions. [2021-12-17 21:03:52,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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 21:03:52,453 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 594 transitions. [2021-12-17 21:03:52,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-17 21:03:52,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:52,454 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:52,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 21:03:52,455 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:52,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:52,455 INFO L85 PathProgramCache]: Analyzing trace with hash -649570128, now seen corresponding path program 1 times [2021-12-17 21:03:52,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:52,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43065503] [2021-12-17 21:03:52,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:52,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:52,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:52,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:03:52,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:52,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:03:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:52,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:03:52,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:52,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:03:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:52,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:03:52,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:52,598 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 21:03:52,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:52,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43065503] [2021-12-17 21:03:52,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43065503] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:52,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:52,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:03:52,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390711326] [2021-12-17 21:03:52,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:52,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:03:52,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:52,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:03:52,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:03:52,602 INFO L87 Difference]: Start difference. First operand 378 states and 594 transitions. Second operand has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 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 21:03:55,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:55,150 INFO L93 Difference]: Finished difference Result 1394 states and 2241 transitions. [2021-12-17 21:03:55,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 21:03:55,151 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 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 178 [2021-12-17 21:03:55,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:55,155 INFO L225 Difference]: With dead ends: 1394 [2021-12-17 21:03:55,155 INFO L226 Difference]: Without dead ends: 1037 [2021-12-17 21:03:55,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:03:55,157 INFO L933 BasicCegarLoop]: 759 mSDtfsCounter, 1552 mSDsluCounter, 1110 mSDsCounter, 0 mSdLazyCounter, 2002 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1571 SdHoareTripleChecker+Valid, 1869 SdHoareTripleChecker+Invalid, 2118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:55,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1571 Valid, 1869 Invalid, 2118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2002 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 21:03:55,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-12-17 21:03:55,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 754. [2021-12-17 21:03:55,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 693 states have (on average 1.5844155844155845) internal successors, (1098), 695 states have internal predecessors, (1098), 47 states have call successors, (47), 12 states have call predecessors, (47), 13 states have return successors, (50), 47 states have call predecessors, (50), 47 states have call successors, (50) [2021-12-17 21:03:55,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1195 transitions. [2021-12-17 21:03:55,200 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1195 transitions. Word has length 178 [2021-12-17 21:03:55,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:55,200 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1195 transitions. [2021-12-17 21:03:55,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 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 21:03:55,200 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1195 transitions. [2021-12-17 21:03:55,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-17 21:03:55,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:55,202 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:55,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 21:03:55,203 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:55,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:55,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1525555404, now seen corresponding path program 1 times [2021-12-17 21:03:55,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:55,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285478235] [2021-12-17 21:03:55,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:55,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:55,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:55,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:03:55,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:55,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:03:55,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:55,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:03:55,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:55,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:03:55,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:55,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:03:55,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:55,361 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 21:03:55,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:55,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285478235] [2021-12-17 21:03:55,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285478235] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:55,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:55,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:03:55,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708430890] [2021-12-17 21:03:55,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:55,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:03:55,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:55,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:03:55,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:03:55,364 INFO L87 Difference]: Start difference. First operand 754 states and 1195 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 21:03:57,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:03:57,028 INFO L93 Difference]: Finished difference Result 1792 states and 2886 transitions. [2021-12-17 21:03:57,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:03:57,028 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 178 [2021-12-17 21:03:57,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:03:57,034 INFO L225 Difference]: With dead ends: 1792 [2021-12-17 21:03:57,035 INFO L226 Difference]: Without dead ends: 1059 [2021-12-17 21:03:57,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:03:57,037 INFO L933 BasicCegarLoop]: 651 mSDtfsCounter, 1118 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 1519 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 1599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:03:57,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1138 Valid, 1585 Invalid, 1599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1519 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-17 21:03:57,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2021-12-17 21:03:57,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 754. [2021-12-17 21:03:57,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 693 states have (on average 1.5815295815295816) internal successors, (1096), 695 states have internal predecessors, (1096), 47 states have call successors, (47), 12 states have call predecessors, (47), 13 states have return successors, (50), 47 states have call predecessors, (50), 47 states have call successors, (50) [2021-12-17 21:03:57,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1193 transitions. [2021-12-17 21:03:57,084 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1193 transitions. Word has length 178 [2021-12-17 21:03:57,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:03:57,084 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1193 transitions. [2021-12-17 21:03:57,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 21:03:57,084 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1193 transitions. [2021-12-17 21:03:57,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-17 21:03:57,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:03:57,086 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:57,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 21:03:57,087 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:03:57,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:03:57,088 INFO L85 PathProgramCache]: Analyzing trace with hash -2136824462, now seen corresponding path program 1 times [2021-12-17 21:03:57,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:03:57,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416509596] [2021-12-17 21:03:57,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:03:57,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:03:57,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:57,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:03:57,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:57,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:03:57,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:57,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:03:57,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:57,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:03:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:57,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:03:57,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:03:57,225 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 21:03:57,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:03:57,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416509596] [2021-12-17 21:03:57,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416509596] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:03:57,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:03:57,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:03:57,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343720632] [2021-12-17 21:03:57,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:03:57,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:03:57,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:03:57,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:03:57,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:03:57,227 INFO L87 Difference]: Start difference. First operand 754 states and 1193 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 21:04:00,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:00,279 INFO L93 Difference]: Finished difference Result 2304 states and 3705 transitions. [2021-12-17 21:04:00,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:04:00,280 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 178 [2021-12-17 21:04:00,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:00,287 INFO L225 Difference]: With dead ends: 2304 [2021-12-17 21:04:00,288 INFO L226 Difference]: Without dead ends: 1571 [2021-12-17 21:04:00,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:04:00,291 INFO L933 BasicCegarLoop]: 997 mSDtfsCounter, 1579 mSDsluCounter, 1940 mSDsCounter, 0 mSdLazyCounter, 3042 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1598 SdHoareTripleChecker+Valid, 2937 SdHoareTripleChecker+Invalid, 3125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 3042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:00,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1598 Valid, 2937 Invalid, 3125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 3042 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 21:04:00,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1571 states. [2021-12-17 21:04:00,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1571 to 1104. [2021-12-17 21:04:00,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1015 states have (on average 1.5753694581280788) internal successors, (1599), 1018 states have internal predecessors, (1599), 68 states have call successors, (68), 18 states have call predecessors, (68), 20 states have return successors, (73), 69 states have call predecessors, (73), 68 states have call successors, (73) [2021-12-17 21:04:00,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1740 transitions. [2021-12-17 21:04:00,362 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1740 transitions. Word has length 178 [2021-12-17 21:04:00,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:00,362 INFO L470 AbstractCegarLoop]: Abstraction has 1104 states and 1740 transitions. [2021-12-17 21:04:00,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 21:04:00,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1740 transitions. [2021-12-17 21:04:00,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-17 21:04:00,364 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:00,364 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:04:00,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 21:04:00,365 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:00,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:00,365 INFO L85 PathProgramCache]: Analyzing trace with hash -242490576, now seen corresponding path program 1 times [2021-12-17 21:04:00,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:00,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548226588] [2021-12-17 21:04:00,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:00,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:00,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:00,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:00,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:00,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:04:00,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:00,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:04:00,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:00,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:04:00,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:00,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:04:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:00,499 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 21:04:00,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:00,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548226588] [2021-12-17 21:04:00,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548226588] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:00,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:00,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:04:00,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402143721] [2021-12-17 21:04:00,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:00,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:04:00,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:00,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:04:00,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:04:00,501 INFO L87 Difference]: Start difference. First operand 1104 states and 1740 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 21:04:03,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:03,477 INFO L93 Difference]: Finished difference Result 3646 states and 5848 transitions. [2021-12-17 21:04:03,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:04:03,477 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 178 [2021-12-17 21:04:03,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:03,488 INFO L225 Difference]: With dead ends: 3646 [2021-12-17 21:04:03,488 INFO L226 Difference]: Without dead ends: 2563 [2021-12-17 21:04:03,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:04:03,494 INFO L933 BasicCegarLoop]: 990 mSDtfsCounter, 1575 mSDsluCounter, 1936 mSDsCounter, 0 mSdLazyCounter, 3026 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1594 SdHoareTripleChecker+Valid, 2926 SdHoareTripleChecker+Invalid, 3110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 3026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:03,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1594 Valid, 2926 Invalid, 3110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 3026 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 21:04:03,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2021-12-17 21:04:03,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 1807. [2021-12-17 21:04:03,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1662 states have (on average 1.5703971119133573) internal successors, (2610), 1667 states have internal predecessors, (2610), 110 states have call successors, (110), 30 states have call predecessors, (110), 34 states have return successors, (123), 113 states have call predecessors, (123), 110 states have call successors, (123) [2021-12-17 21:04:03,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 2843 transitions. [2021-12-17 21:04:03,612 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 2843 transitions. Word has length 178 [2021-12-17 21:04:03,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:03,612 INFO L470 AbstractCegarLoop]: Abstraction has 1807 states and 2843 transitions. [2021-12-17 21:04:03,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 21:04:03,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 2843 transitions. [2021-12-17 21:04:03,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-17 21:04:03,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:03,616 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:04:03,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 21:04:03,616 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:03,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:03,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1204090290, now seen corresponding path program 1 times [2021-12-17 21:04:03,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:03,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354483028] [2021-12-17 21:04:03,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:03,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:03,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:03,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:03,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:03,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:04:03,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:03,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:04:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:03,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:04:03,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:03,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:04:03,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:03,764 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 21:04:03,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:03,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354483028] [2021-12-17 21:04:03,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354483028] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:03,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:03,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:04:03,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852862432] [2021-12-17 21:04:03,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:03,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:04:03,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:03,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:04:03,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:04:03,767 INFO L87 Difference]: Start difference. First operand 1807 states and 2843 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 21:04:06,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:06,576 INFO L93 Difference]: Finished difference Result 6237 states and 9963 transitions. [2021-12-17 21:04:06,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:04:06,577 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 178 [2021-12-17 21:04:06,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:06,594 INFO L225 Difference]: With dead ends: 6237 [2021-12-17 21:04:06,594 INFO L226 Difference]: Without dead ends: 4451 [2021-12-17 21:04:06,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:04:06,600 INFO L933 BasicCegarLoop]: 734 mSDtfsCounter, 1675 mSDsluCounter, 1280 mSDsCounter, 0 mSdLazyCounter, 2677 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1694 SdHoareTripleChecker+Valid, 2014 SdHoareTripleChecker+Invalid, 2803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:06,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1694 Valid, 2014 Invalid, 2803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 2677 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 21:04:06,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2021-12-17 21:04:06,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 3216. [2021-12-17 21:04:06,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3216 states, 2959 states have (on average 1.5667455221358566) internal successors, (4636), 2968 states have internal predecessors, (4636), 194 states have call successors, (194), 54 states have call predecessors, (194), 62 states have return successors, (229), 201 states have call predecessors, (229), 194 states have call successors, (229) [2021-12-17 21:04:06,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3216 states to 3216 states and 5059 transitions. [2021-12-17 21:04:06,838 INFO L78 Accepts]: Start accepts. Automaton has 3216 states and 5059 transitions. Word has length 178 [2021-12-17 21:04:06,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:06,839 INFO L470 AbstractCegarLoop]: Abstraction has 3216 states and 5059 transitions. [2021-12-17 21:04:06,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 21:04:06,839 INFO L276 IsEmpty]: Start isEmpty. Operand 3216 states and 5059 transitions. [2021-12-17 21:04:06,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-17 21:04:06,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:06,842 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:04:06,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 21:04:06,842 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:06,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:06,843 INFO L85 PathProgramCache]: Analyzing trace with hash 280922864, now seen corresponding path program 1 times [2021-12-17 21:04:06,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:06,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26826517] [2021-12-17 21:04:06,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:06,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:06,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:06,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:04:06,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:06,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:04:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:06,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:04:06,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:07,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:04:07,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:07,003 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 21:04:07,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:07,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26826517] [2021-12-17 21:04:07,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26826517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:07,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:07,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:04:07,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550500327] [2021-12-17 21:04:07,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:07,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:04:07,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:07,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:04:07,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:04:07,007 INFO L87 Difference]: Start difference. First operand 3216 states and 5059 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 21:04:10,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:10,144 INFO L93 Difference]: Finished difference Result 11420 states and 18213 transitions. [2021-12-17 21:04:10,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:04:10,145 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 178 [2021-12-17 21:04:10,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:10,176 INFO L225 Difference]: With dead ends: 11420 [2021-12-17 21:04:10,176 INFO L226 Difference]: Without dead ends: 8225 [2021-12-17 21:04:10,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:04:10,188 INFO L933 BasicCegarLoop]: 980 mSDtfsCounter, 1573 mSDsluCounter, 1936 mSDsCounter, 0 mSdLazyCounter, 3010 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1592 SdHoareTripleChecker+Valid, 2916 SdHoareTripleChecker+Invalid, 3094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 3010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:10,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1592 Valid, 2916 Invalid, 3094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 3010 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 21:04:10,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8225 states. [2021-12-17 21:04:10,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8225 to 6041. [2021-12-17 21:04:10,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6041 states, 5560 states have (on average 1.564388489208633) internal successors, (8698), 5577 states have internal predecessors, (8698), 362 states have call successors, (362), 102 states have call predecessors, (362), 118 states have return successors, (459), 377 states have call predecessors, (459), 362 states have call successors, (459) [2021-12-17 21:04:10,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6041 states to 6041 states and 9519 transitions. [2021-12-17 21:04:10,588 INFO L78 Accepts]: Start accepts. Automaton has 6041 states and 9519 transitions. Word has length 178 [2021-12-17 21:04:10,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:10,588 INFO L470 AbstractCegarLoop]: Abstraction has 6041 states and 9519 transitions. [2021-12-17 21:04:10,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 21:04:10,589 INFO L276 IsEmpty]: Start isEmpty. Operand 6041 states and 9519 transitions. [2021-12-17 21:04:10,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-17 21:04:10,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:10,593 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:04:10,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 21:04:10,593 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:10,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:10,594 INFO L85 PathProgramCache]: Analyzing trace with hash 666785266, now seen corresponding path program 1 times [2021-12-17 21:04:10,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:10,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566066653] [2021-12-17 21:04:10,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:10,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:10,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:10,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:10,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:04:10,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:10,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:04:10,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:10,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:04:10,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:10,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:04:10,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:10,737 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 21:04:10,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:10,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566066653] [2021-12-17 21:04:10,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566066653] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:10,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:10,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:04:10,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507875908] [2021-12-17 21:04:10,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:10,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:04:10,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:10,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:04:10,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:04:10,739 INFO L87 Difference]: Start difference. First operand 6041 states and 9519 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 21:04:14,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:14,215 INFO L93 Difference]: Finished difference Result 21787 states and 34775 transitions. [2021-12-17 21:04:14,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:04:14,220 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 178 [2021-12-17 21:04:14,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:14,287 INFO L225 Difference]: With dead ends: 21787 [2021-12-17 21:04:14,287 INFO L226 Difference]: Without dead ends: 15767 [2021-12-17 21:04:14,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:04:14,315 INFO L933 BasicCegarLoop]: 975 mSDtfsCounter, 1572 mSDsluCounter, 1936 mSDsCounter, 0 mSdLazyCounter, 3002 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1591 SdHoareTripleChecker+Valid, 2911 SdHoareTripleChecker+Invalid, 3086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 3002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:14,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1591 Valid, 2911 Invalid, 3086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 3002 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 21:04:14,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15767 states. [2021-12-17 21:04:15,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15767 to 11706. [2021-12-17 21:04:15,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11706 states, 10777 states have (on average 1.562958151619189) internal successors, (16844), 10810 states have internal predecessors, (16844), 698 states have call successors, (698), 198 states have call predecessors, (698), 230 states have return successors, (973), 729 states have call predecessors, (973), 698 states have call successors, (973) [2021-12-17 21:04:15,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11706 states to 11706 states and 18515 transitions. [2021-12-17 21:04:15,152 INFO L78 Accepts]: Start accepts. Automaton has 11706 states and 18515 transitions. Word has length 178 [2021-12-17 21:04:15,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:15,152 INFO L470 AbstractCegarLoop]: Abstraction has 11706 states and 18515 transitions. [2021-12-17 21:04:15,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 21:04:15,153 INFO L276 IsEmpty]: Start isEmpty. Operand 11706 states and 18515 transitions. [2021-12-17 21:04:15,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-17 21:04:15,160 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:15,160 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:04:15,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 21:04:15,161 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:15,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:15,161 INFO L85 PathProgramCache]: Analyzing trace with hash 402137776, now seen corresponding path program 1 times [2021-12-17 21:04:15,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:15,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210326179] [2021-12-17 21:04:15,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:15,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:15,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:15,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:15,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:04:15,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:15,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:04:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:15,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:04:15,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:15,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:04:15,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:15,300 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 21:04:15,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:15,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210326179] [2021-12-17 21:04:15,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210326179] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:15,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:15,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:04:15,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085586646] [2021-12-17 21:04:15,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:15,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:04:15,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:15,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:04:15,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:04:15,303 INFO L87 Difference]: Start difference. First operand 11706 states and 18515 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 21:04:19,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:19,782 INFO L93 Difference]: Finished difference Result 42522 states and 68093 transitions. [2021-12-17 21:04:19,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:04:19,783 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 178 [2021-12-17 21:04:19,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:19,908 INFO L225 Difference]: With dead ends: 42522 [2021-12-17 21:04:19,908 INFO L226 Difference]: Without dead ends: 30837 [2021-12-17 21:04:19,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:04:19,959 INFO L933 BasicCegarLoop]: 970 mSDtfsCounter, 1571 mSDsluCounter, 1936 mSDsCounter, 0 mSdLazyCounter, 2994 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1590 SdHoareTripleChecker+Valid, 2906 SdHoareTripleChecker+Invalid, 3078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:19,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1590 Valid, 2906 Invalid, 3078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2994 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 21:04:19,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30837 states. [2021-12-17 21:04:21,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30837 to 23067. [2021-12-17 21:04:21,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23067 states, 21242 states have (on average 1.5620939647867433) internal successors, (33182), 21307 states have internal predecessors, (33182), 1370 states have call successors, (1370), 390 states have call predecessors, (1370), 454 states have return successors, (2163), 1433 states have call predecessors, (2163), 1370 states have call successors, (2163) [2021-12-17 21:04:21,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23067 states to 23067 states and 36715 transitions. [2021-12-17 21:04:21,488 INFO L78 Accepts]: Start accepts. Automaton has 23067 states and 36715 transitions. Word has length 178 [2021-12-17 21:04:21,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:21,488 INFO L470 AbstractCegarLoop]: Abstraction has 23067 states and 36715 transitions. [2021-12-17 21:04:21,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 21:04:21,489 INFO L276 IsEmpty]: Start isEmpty. Operand 23067 states and 36715 transitions. [2021-12-17 21:04:21,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-17 21:04:21,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:21,502 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:04:21,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 21:04:21,503 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:21,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:21,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1961703886, now seen corresponding path program 1 times [2021-12-17 21:04:21,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:21,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260666294] [2021-12-17 21:04:21,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:21,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:21,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:21,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:21,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:21,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:04:21,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:21,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:04:21,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:21,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:04:21,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:21,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:04:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:21,650 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 21:04:21,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:21,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260666294] [2021-12-17 21:04:21,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260666294] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:21,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:21,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:04:21,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836182723] [2021-12-17 21:04:21,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:21,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:04:21,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:21,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:04:21,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:04:21,654 INFO L87 Difference]: Start difference. First operand 23067 states and 36715 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 21:04:28,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:28,173 INFO L93 Difference]: Finished difference Result 83993 states and 135331 transitions. [2021-12-17 21:04:28,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:04:28,174 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 178 [2021-12-17 21:04:28,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:28,407 INFO L225 Difference]: With dead ends: 83993 [2021-12-17 21:04:28,407 INFO L226 Difference]: Without dead ends: 60947 [2021-12-17 21:04:28,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:04:28,497 INFO L933 BasicCegarLoop]: 963 mSDtfsCounter, 1573 mSDsluCounter, 1936 mSDsCounter, 0 mSdLazyCounter, 2983 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1592 SdHoareTripleChecker+Valid, 2899 SdHoareTripleChecker+Invalid, 3070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:28,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1592 Valid, 2899 Invalid, 3070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2983 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 21:04:28,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60947 states. [2021-12-17 21:04:31,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60947 to 45852. [2021-12-17 21:04:31,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45852 states, 42235 states have (on average 1.561548478749852) internal successors, (65952), 42364 states have internal predecessors, (65952), 2714 states have call successors, (2714), 774 states have call predecessors, (2714), 902 states have return successors, (5029), 2841 states have call predecessors, (5029), 2714 states have call successors, (5029) [2021-12-17 21:04:31,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45852 states to 45852 states and 73695 transitions. [2021-12-17 21:04:31,930 INFO L78 Accepts]: Start accepts. Automaton has 45852 states and 73695 transitions. Word has length 178 [2021-12-17 21:04:31,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:31,930 INFO L470 AbstractCegarLoop]: Abstraction has 45852 states and 73695 transitions. [2021-12-17 21:04:31,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 21:04:31,930 INFO L276 IsEmpty]: Start isEmpty. Operand 45852 states and 73695 transitions. [2021-12-17 21:04:31,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-17 21:04:31,955 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:31,955 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:04:31,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 21:04:31,955 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:31,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:31,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1010084464, now seen corresponding path program 1 times [2021-12-17 21:04:31,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:31,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434224836] [2021-12-17 21:04:31,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:31,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:31,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:31,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:31,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:32,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:04:32,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:32,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:04:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:32,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:04:32,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:32,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:04:32,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:32,107 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 21:04:32,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:32,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434224836] [2021-12-17 21:04:32,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434224836] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:32,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:32,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:04:32,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535647767] [2021-12-17 21:04:32,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:32,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:04:32,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:32,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:04:32,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:04:32,110 INFO L87 Difference]: Start difference. First operand 45852 states and 73695 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 21:04:37,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:37,696 INFO L93 Difference]: Finished difference Result 107625 states and 176008 transitions. [2021-12-17 21:04:37,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:04:37,697 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 178 [2021-12-17 21:04:37,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:37,981 INFO L225 Difference]: With dead ends: 107625 [2021-12-17 21:04:37,981 INFO L226 Difference]: Without dead ends: 61794 [2021-12-17 21:04:38,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:04:38,126 INFO L933 BasicCegarLoop]: 619 mSDtfsCounter, 1123 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 1436 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1143 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 1522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:38,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1143 Valid, 1552 Invalid, 1522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1436 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-17 21:04:38,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61794 states. [2021-12-17 21:04:41,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61794 to 45852. [2021-12-17 21:04:41,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45852 states, 42235 states have (on average 1.5584941399313366) internal successors, (65823), 42364 states have internal predecessors, (65823), 2714 states have call successors, (2714), 774 states have call predecessors, (2714), 902 states have return successors, (5029), 2841 states have call predecessors, (5029), 2714 states have call successors, (5029) [2021-12-17 21:04:41,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45852 states to 45852 states and 73566 transitions. [2021-12-17 21:04:41,411 INFO L78 Accepts]: Start accepts. Automaton has 45852 states and 73566 transitions. Word has length 178 [2021-12-17 21:04:41,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:41,411 INFO L470 AbstractCegarLoop]: Abstraction has 45852 states and 73566 transitions. [2021-12-17 21:04:41,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 21:04:41,412 INFO L276 IsEmpty]: Start isEmpty. Operand 45852 states and 73566 transitions. [2021-12-17 21:04:41,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-17 21:04:41,437 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:41,438 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:04:41,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 21:04:41,439 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:41,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:41,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1348372014, now seen corresponding path program 1 times [2021-12-17 21:04:41,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:41,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860391821] [2021-12-17 21:04:41,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:41,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:41,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:41,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:41,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:04:41,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:41,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:04:41,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:41,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:04:41,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:41,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:04:41,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:41,582 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 21:04:41,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:41,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860391821] [2021-12-17 21:04:41,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860391821] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:41,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:41,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:04:41,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118215754] [2021-12-17 21:04:41,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:41,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:04:41,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:41,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:04:41,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:04:41,585 INFO L87 Difference]: Start difference. First operand 45852 states and 73566 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 21:04:52,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:52,147 INFO L93 Difference]: Finished difference Result 166676 states and 270493 transitions. [2021-12-17 21:04:52,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:04:52,148 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 178 [2021-12-17 21:04:52,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:04:52,638 INFO L225 Difference]: With dead ends: 166676 [2021-12-17 21:04:52,638 INFO L226 Difference]: Without dead ends: 120845 [2021-12-17 21:04:52,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:04:52,805 INFO L933 BasicCegarLoop]: 948 mSDtfsCounter, 1561 mSDsluCounter, 1936 mSDsCounter, 0 mSdLazyCounter, 2946 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1580 SdHoareTripleChecker+Valid, 2884 SdHoareTripleChecker+Invalid, 3033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:04:52,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1580 Valid, 2884 Invalid, 3033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2946 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 21:04:52,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120845 states. [2021-12-17 21:04:58,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120845 to 91807. [2021-12-17 21:04:58,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91807 states, 84606 states have (on average 1.5579627922369572) internal successors, (131813), 84863 states have internal predecessors, (131813), 5402 states have call successors, (5402), 1542 states have call predecessors, (5402), 1798 states have return successors, (12219), 5657 states have call predecessors, (12219), 5402 states have call successors, (12219) [2021-12-17 21:04:59,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91807 states to 91807 states and 149434 transitions. [2021-12-17 21:04:59,309 INFO L78 Accepts]: Start accepts. Automaton has 91807 states and 149434 transitions. Word has length 178 [2021-12-17 21:04:59,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:04:59,310 INFO L470 AbstractCegarLoop]: Abstraction has 91807 states and 149434 transitions. [2021-12-17 21:04:59,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 21:04:59,310 INFO L276 IsEmpty]: Start isEmpty. Operand 91807 states and 149434 transitions. [2021-12-17 21:04:59,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-17 21:04:59,353 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:59,353 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:04:59,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-17 21:04:59,353 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:59,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:59,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1774926512, now seen corresponding path program 1 times [2021-12-17 21:04:59,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:59,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505593867] [2021-12-17 21:04:59,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:59,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:59,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:59,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:59,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:59,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:04:59,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:59,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:04:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:59,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:04:59,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:59,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:04:59,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:59,494 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 21:04:59,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:59,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505593867] [2021-12-17 21:04:59,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505593867] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:59,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:59,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:04:59,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578990242] [2021-12-17 21:04:59,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:59,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:04:59,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:59,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:04:59,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:04:59,497 INFO L87 Difference]: Start difference. First operand 91807 states and 149434 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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)