./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label49+token_ring.02.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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/Problem05_label49+token_ring.02.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 454b29c5fe5071d16700d38fede778ad07010669479cf8e19070acab5fe681c9 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 02:01:57,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 02:01:57,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 02:01:57,772 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 02:01:57,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 02:01:57,773 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 02:01:57,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 02:01:57,775 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 02:01:57,776 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 02:01:57,777 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 02:01:57,778 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 02:01:57,779 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 02:01:57,779 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 02:01:57,780 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 02:01:57,780 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 02:01:57,781 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 02:01:57,782 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 02:01:57,783 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 02:01:57,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 02:01:57,786 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 02:01:57,787 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 02:01:57,788 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 02:01:57,789 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 02:01:57,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 02:01:57,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 02:01:57,792 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 02:01:57,792 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 02:01:57,793 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 02:01:57,793 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 02:01:57,794 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 02:01:57,794 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 02:01:57,795 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 02:01:57,795 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 02:01:57,796 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 02:01:57,796 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 02:01:57,796 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 02:01:57,797 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 02:01:57,797 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 02:01:57,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 02:01:57,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 02:01:57,798 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 02:01:57,799 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 02:01:57,826 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 02:01:57,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 02:01:57,827 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 02:01:57,827 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 02:01:57,827 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 02:01:57,827 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 02:01:57,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 02:01:57,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 02:01:57,828 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 02:01:57,828 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 02:01:57,828 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 02:01:57,828 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 02:01:57,828 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 02:01:57,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 02:01:57,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 02:01:57,833 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 02:01:57,834 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 02:01:57,834 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 02:01:57,834 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 02:01:57,834 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 02:01:57,834 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 02:01:57,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 02:01:57,835 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 02:01:57,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 02:01:57,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:01:57,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 02:01:57,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 02:01:57,835 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 02:01:57,836 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 02:01:57,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 02:01:57,836 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 02:01:57,836 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 02:01:57,836 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 02:01:57,836 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 454b29c5fe5071d16700d38fede778ad07010669479cf8e19070acab5fe681c9 [2021-12-28 02:01:58,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 02:01:58,084 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 02:01:58,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 02:01:58,087 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 02:01:58,088 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 02:01:58,089 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label49+token_ring.02.cil-2.c [2021-12-28 02:01:58,131 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eef2da374/f009a866829a45d4a13b3dfb655fa223/FLAGa670166ce [2021-12-28 02:01:58,785 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 02:01:58,785 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label49+token_ring.02.cil-2.c [2021-12-28 02:01:58,817 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eef2da374/f009a866829a45d4a13b3dfb655fa223/FLAGa670166ce [2021-12-28 02:01:59,166 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eef2da374/f009a866829a45d4a13b3dfb655fa223 [2021-12-28 02:01:59,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 02:01:59,169 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 02:01:59,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 02:01:59,169 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 02:01:59,172 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 02:01:59,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:01:59" (1/1) ... [2021-12-28 02:01:59,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7aa51731 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:01:59, skipping insertion in model container [2021-12-28 02:01:59,187 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:01:59" (1/1) ... [2021-12-28 02:01:59,192 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 02:01:59,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 02:02:00,510 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/Problem05_label49+token_ring.02.cil-2.c[380593,380606] [2021-12-28 02:02:00,532 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/Problem05_label49+token_ring.02.cil-2.c[383339,383352] [2021-12-28 02:02:00,646 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:02:00,652 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 02:02:01,311 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/Problem05_label49+token_ring.02.cil-2.c[380593,380606] [2021-12-28 02:02:01,320 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/Problem05_label49+token_ring.02.cil-2.c[383339,383352] [2021-12-28 02:02:01,335 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:02:01,396 INFO L208 MainTranslator]: Completed translation [2021-12-28 02:02:01,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:02:01 WrapperNode [2021-12-28 02:02:01,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 02:02:01,399 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 02:02:01,399 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 02:02:01,399 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 02:02:01,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:02:01" (1/1) ... [2021-12-28 02:02:01,460 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:02:01" (1/1) ... [2021-12-28 02:02:01,813 INFO L137 Inliner]: procedures = 48, calls = 48, calls flagged for inlining = 25, calls inlined = 25, statements flattened = 12624 [2021-12-28 02:02:01,814 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 02:02:01,814 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 02:02:01,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 02:02:01,815 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 02:02:01,821 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:02:01" (1/1) ... [2021-12-28 02:02:01,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:02:01" (1/1) ... [2021-12-28 02:02:01,885 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:02:01" (1/1) ... [2021-12-28 02:02:01,885 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:02:01" (1/1) ... [2021-12-28 02:02:02,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:02:01" (1/1) ... [2021-12-28 02:02:02,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:02:01" (1/1) ... [2021-12-28 02:02:02,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:02:01" (1/1) ... [2021-12-28 02:02:02,172 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 02:02:02,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 02:02:02,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 02:02:02,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 02:02:02,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:02:01" (1/1) ... [2021-12-28 02:02:02,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:02:02,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:02:02,199 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) [2021-12-28 02:02:02,211 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 [2021-12-28 02:02:02,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 02:02:02,236 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-12-28 02:02:02,236 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-12-28 02:02:02,236 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-28 02:02:02,236 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-28 02:02:02,236 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-28 02:02:02,237 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-28 02:02:02,237 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-28 02:02:02,237 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-28 02:02:02,237 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-28 02:02:02,237 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-28 02:02:02,237 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-28 02:02:02,238 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-28 02:02:02,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 02:02:02,238 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-28 02:02:02,238 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-28 02:02:02,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 02:02:02,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 02:02:02,342 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 02:02:02,344 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 02:02:06,958 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 02:02:06,986 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 02:02:06,986 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-28 02:02:06,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:02:06 BoogieIcfgContainer [2021-12-28 02:02:06,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 02:02:06,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 02:02:06,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 02:02:06,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 02:02:06,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 02:01:59" (1/3) ... [2021-12-28 02:02:06,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c43e887 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:02:06, skipping insertion in model container [2021-12-28 02:02:06,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:02:01" (2/3) ... [2021-12-28 02:02:06,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c43e887 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:02:06, skipping insertion in model container [2021-12-28 02:02:06,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:02:06" (3/3) ... [2021-12-28 02:02:06,996 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.02.cil-2.c [2021-12-28 02:02:07,000 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 02:02:07,000 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-28 02:02:07,042 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 02:02:07,048 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 [2021-12-28 02:02:07,048 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-28 02:02:07,089 INFO L276 IsEmpty]: Start isEmpty. Operand has 2323 states, 2295 states have (on average 1.857516339869281) internal successors, (4263), 2300 states have internal predecessors, (4263), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-28 02:02:07,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-28 02:02:07,095 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:02:07,096 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] [2021-12-28 02:02:07,096 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:02:07,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:02:07,100 INFO L85 PathProgramCache]: Analyzing trace with hash -2062992276, now seen corresponding path program 1 times [2021-12-28 02:02:07,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:02:07,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578564980] [2021-12-28 02:02:07,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:02:07,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:02:07,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:07,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:02:07,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:07,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:02:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:07,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:02:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:07,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:02:07,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:07,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:02:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:07,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:02:07,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:02:07,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578564980] [2021-12-28 02:02:07,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578564980] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:02:07,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:02:07,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:02:07,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447028932] [2021-12-28 02:02:07,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:02:07,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:02:07,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:02:07,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:02:07,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:02:07,376 INFO L87 Difference]: Start difference. First operand has 2323 states, 2295 states have (on average 1.857516339869281) internal successors, (4263), 2300 states have internal predecessors, (4263), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:02:08,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:02:08,078 INFO L93 Difference]: Finished difference Result 4824 states and 8887 transitions. [2021-12-28 02:02:08,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:02:08,080 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-12-28 02:02:08,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:02:08,098 INFO L225 Difference]: With dead ends: 4824 [2021-12-28 02:02:08,099 INFO L226 Difference]: Without dead ends: 2441 [2021-12-28 02:02:08,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:02:08,108 INFO L933 BasicCegarLoop]: 4249 mSDtfsCounter, 4444 mSDsluCounter, 12443 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4453 SdHoareTripleChecker+Valid, 16692 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:02:08,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4453 Valid, 16692 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 02:02:08,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2441 states. [2021-12-28 02:02:08,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2441 to 2376. [2021-12-28 02:02:08,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 2332 states have (on average 1.8340480274442539) internal successors, (4277), 2336 states have internal predecessors, (4277), 29 states have call successors, (29), 13 states have call predecessors, (29), 13 states have return successors, (30), 27 states have call predecessors, (30), 27 states have call successors, (30) [2021-12-28 02:02:08,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 4336 transitions. [2021-12-28 02:02:08,274 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 4336 transitions. Word has length 69 [2021-12-28 02:02:08,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:02:08,275 INFO L470 AbstractCegarLoop]: Abstraction has 2376 states and 4336 transitions. [2021-12-28 02:02:08,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:02:08,275 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 4336 transitions. [2021-12-28 02:02:08,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-28 02:02:08,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:02:08,278 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] [2021-12-28 02:02:08,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 02:02:08,279 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:02:08,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:02:08,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1960277912, now seen corresponding path program 1 times [2021-12-28 02:02:08,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:02:08,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758076111] [2021-12-28 02:02:08,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:02:08,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:02:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:08,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:02:08,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:08,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:02:08,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:08,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:02:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:08,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:02:08,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:08,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:02:08,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:08,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:02:08,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:02:08,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758076111] [2021-12-28 02:02:08,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758076111] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:02:08,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:02:08,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:02:08,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921548045] [2021-12-28 02:02:08,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:02:08,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:02:08,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:02:08,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:02:08,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:02:08,376 INFO L87 Difference]: Start difference. First operand 2376 states and 4336 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:02:09,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:02:09,117 INFO L93 Difference]: Finished difference Result 2838 states and 5030 transitions. [2021-12-28 02:02:09,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:02:09,118 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-12-28 02:02:09,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:02:09,129 INFO L225 Difference]: With dead ends: 2838 [2021-12-28 02:02:09,130 INFO L226 Difference]: Without dead ends: 2593 [2021-12-28 02:02:09,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:02:09,134 INFO L933 BasicCegarLoop]: 4270 mSDtfsCounter, 4365 mSDsluCounter, 16510 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4374 SdHoareTripleChecker+Valid, 20780 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:02:09,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4374 Valid, 20780 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 871 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 02:02:09,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2593 states. [2021-12-28 02:02:09,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2593 to 2490. [2021-12-28 02:02:09,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2490 states, 2428 states have (on average 1.82001647446458) internal successors, (4419), 2433 states have internal predecessors, (4419), 40 states have call successors, (40), 19 states have call predecessors, (40), 20 states have return successors, (43), 39 states have call predecessors, (43), 38 states have call successors, (43) [2021-12-28 02:02:09,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2490 states to 2490 states and 4502 transitions. [2021-12-28 02:02:09,181 INFO L78 Accepts]: Start accepts. Automaton has 2490 states and 4502 transitions. Word has length 69 [2021-12-28 02:02:09,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:02:09,182 INFO L470 AbstractCegarLoop]: Abstraction has 2490 states and 4502 transitions. [2021-12-28 02:02:09,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:02:09,182 INFO L276 IsEmpty]: Start isEmpty. Operand 2490 states and 4502 transitions. [2021-12-28 02:02:09,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-28 02:02:09,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:02:09,184 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] [2021-12-28 02:02:09,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 02:02:09,185 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:02:09,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:02:09,185 INFO L85 PathProgramCache]: Analyzing trace with hash -573492502, now seen corresponding path program 1 times [2021-12-28 02:02:09,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:02:09,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805985668] [2021-12-28 02:02:09,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:02:09,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:02:09,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:09,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:02:09,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:09,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:02:09,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:09,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:02:09,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:09,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:02:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:09,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:02:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:09,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:02:09,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:02:09,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805985668] [2021-12-28 02:02:09,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805985668] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:02:09,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:02:09,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:02:09,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334305562] [2021-12-28 02:02:09,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:02:09,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:02:09,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:02:09,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:02:09,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:02:09,252 INFO L87 Difference]: Start difference. First operand 2490 states and 4502 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:02:09,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:02:09,916 INFO L93 Difference]: Finished difference Result 3239 states and 5624 transitions. [2021-12-28 02:02:09,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:02:09,917 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-12-28 02:02:09,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:02:09,927 INFO L225 Difference]: With dead ends: 3239 [2021-12-28 02:02:09,927 INFO L226 Difference]: Without dead ends: 2880 [2021-12-28 02:02:09,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:02:09,934 INFO L933 BasicCegarLoop]: 4181 mSDtfsCounter, 4399 mSDsluCounter, 16296 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4408 SdHoareTripleChecker+Valid, 20477 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:02:09,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4408 Valid, 20477 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 02:02:09,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2021-12-28 02:02:09,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 2719. [2021-12-28 02:02:09,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2719 states, 2621 states have (on average 1.794734834032812) internal successors, (4704), 2628 states have internal predecessors, (4704), 62 states have call successors, (62), 31 states have call predecessors, (62), 34 states have return successors, (73), 63 states have call predecessors, (73), 60 states have call successors, (73) [2021-12-28 02:02:09,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2719 states to 2719 states and 4839 transitions. [2021-12-28 02:02:09,999 INFO L78 Accepts]: Start accepts. Automaton has 2719 states and 4839 transitions. Word has length 69 [2021-12-28 02:02:09,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:02:09,999 INFO L470 AbstractCegarLoop]: Abstraction has 2719 states and 4839 transitions. [2021-12-28 02:02:10,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:02:10,000 INFO L276 IsEmpty]: Start isEmpty. Operand 2719 states and 4839 transitions. [2021-12-28 02:02:10,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-28 02:02:10,003 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:02:10,003 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] [2021-12-28 02:02:10,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 02:02:10,004 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:02:10,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:02:10,005 INFO L85 PathProgramCache]: Analyzing trace with hash 302526504, now seen corresponding path program 1 times [2021-12-28 02:02:10,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:02:10,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496636205] [2021-12-28 02:02:10,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:02:10,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:02:10,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:10,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:02:10,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:10,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:02:10,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:10,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:02:10,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:10,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:02:10,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:10,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:02:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:10,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:02:10,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:02:10,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496636205] [2021-12-28 02:02:10,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496636205] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:02:10,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:02:10,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:02:10,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333135234] [2021-12-28 02:02:10,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:02:10,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:02:10,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:02:10,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:02:10,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:02:10,074 INFO L87 Difference]: Start difference. First operand 2719 states and 4839 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:02:10,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:02:10,901 INFO L93 Difference]: Finished difference Result 4113 states and 6915 transitions. [2021-12-28 02:02:10,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 02:02:10,901 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-12-28 02:02:10,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:02:10,912 INFO L225 Difference]: With dead ends: 4113 [2021-12-28 02:02:10,913 INFO L226 Difference]: Without dead ends: 3525 [2021-12-28 02:02:10,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:02:10,915 INFO L933 BasicCegarLoop]: 4279 mSDtfsCounter, 4371 mSDsluCounter, 16499 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4379 SdHoareTripleChecker+Valid, 20778 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 02:02:10,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4379 Valid, 20778 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-28 02:02:10,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3525 states. [2021-12-28 02:02:10,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3525 to 3131. [2021-12-28 02:02:10,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3131 states, 2965 states have (on average 1.7551433389544688) internal successors, (5204), 2976 states have internal predecessors, (5204), 102 states have call successors, (102), 55 states have call predecessors, (102), 62 states have return successors, (135), 107 states have call predecessors, (135), 100 states have call successors, (135) [2021-12-28 02:02:10,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 5441 transitions. [2021-12-28 02:02:10,994 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 5441 transitions. Word has length 69 [2021-12-28 02:02:10,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:02:10,995 INFO L470 AbstractCegarLoop]: Abstraction has 3131 states and 5441 transitions. [2021-12-28 02:02:10,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:02:10,995 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 5441 transitions. [2021-12-28 02:02:10,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-28 02:02:10,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:02:10,997 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] [2021-12-28 02:02:10,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 02:02:10,997 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:02:10,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:02:10,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1840866534, now seen corresponding path program 1 times [2021-12-28 02:02:10,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:02:10,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537047288] [2021-12-28 02:02:10,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:02:10,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:02:11,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:11,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:02:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:11,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:02:11,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:11,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:02:11,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:11,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:02:11,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:11,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:02:11,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:11,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:02:11,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:02:11,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537047288] [2021-12-28 02:02:11,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537047288] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:02:11,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:02:11,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:02:11,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135454757] [2021-12-28 02:02:11,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:02:11,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:02:11,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:02:11,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:02:11,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:02:11,064 INFO L87 Difference]: Start difference. First operand 3131 states and 5441 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:02:11,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:02:11,788 INFO L93 Difference]: Finished difference Result 5511 states and 8955 transitions. [2021-12-28 02:02:11,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 02:02:11,788 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-12-28 02:02:11,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:02:11,804 INFO L225 Difference]: With dead ends: 5511 [2021-12-28 02:02:11,804 INFO L226 Difference]: Without dead ends: 4511 [2021-12-28 02:02:11,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:02:11,810 INFO L933 BasicCegarLoop]: 4248 mSDtfsCounter, 4376 mSDsluCounter, 16502 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4388 SdHoareTripleChecker+Valid, 20750 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:02:11,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4388 Valid, 20750 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 02:02:11,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2021-12-28 02:02:11,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 3988. [2021-12-28 02:02:11,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3988 states, 3690 states have (on average 1.7002710027100272) internal successors, (6274), 3709 states have internal predecessors, (6274), 178 states have call successors, (178), 103 states have call predecessors, (178), 118 states have return successors, (273), 191 states have call predecessors, (273), 176 states have call successors, (273) [2021-12-28 02:02:11,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3988 states to 3988 states and 6725 transitions. [2021-12-28 02:02:11,932 INFO L78 Accepts]: Start accepts. Automaton has 3988 states and 6725 transitions. Word has length 69 [2021-12-28 02:02:11,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:02:11,933 INFO L470 AbstractCegarLoop]: Abstraction has 3988 states and 6725 transitions. [2021-12-28 02:02:11,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:02:11,933 INFO L276 IsEmpty]: Start isEmpty. Operand 3988 states and 6725 transitions. [2021-12-28 02:02:11,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-28 02:02:11,935 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:02:11,936 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] [2021-12-28 02:02:11,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 02:02:11,936 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:02:11,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:02:11,936 INFO L85 PathProgramCache]: Analyzing trace with hash -187719576, now seen corresponding path program 1 times [2021-12-28 02:02:11,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:02:11,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204715592] [2021-12-28 02:02:11,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:02:11,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:02:11,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:11,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:02:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:11,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:02:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:12,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:02:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:12,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:02:12,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:12,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:02:12,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:12,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:02:12,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:02:12,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204715592] [2021-12-28 02:02:12,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204715592] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:02:12,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:02:12,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:02:12,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942625842] [2021-12-28 02:02:12,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:02:12,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:02:12,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:02:12,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:02:12,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:02:12,025 INFO L87 Difference]: Start difference. First operand 3988 states and 6725 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:02:12,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:02:12,714 INFO L93 Difference]: Finished difference Result 7372 states and 11760 transitions. [2021-12-28 02:02:12,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:02:12,714 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-12-28 02:02:12,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:02:12,735 INFO L225 Difference]: With dead ends: 7372 [2021-12-28 02:02:12,735 INFO L226 Difference]: Without dead ends: 5516 [2021-12-28 02:02:12,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-28 02:02:12,743 INFO L933 BasicCegarLoop]: 4312 mSDtfsCounter, 4499 mSDsluCounter, 12269 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4524 SdHoareTripleChecker+Valid, 16581 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:02:12,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4524 Valid, 16581 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 02:02:12,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5516 states. [2021-12-28 02:02:12,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5516 to 4929. [2021-12-28 02:02:12,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4929 states, 4473 states have (on average 1.6492287055667338) internal successors, (7377), 4509 states have internal predecessors, (7377), 274 states have call successors, (274), 157 states have call predecessors, (274), 180 states have return successors, (397), 278 states have call predecessors, (397), 272 states have call successors, (397) [2021-12-28 02:02:12,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4929 states to 4929 states and 8048 transitions. [2021-12-28 02:02:12,886 INFO L78 Accepts]: Start accepts. Automaton has 4929 states and 8048 transitions. Word has length 69 [2021-12-28 02:02:12,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:02:12,887 INFO L470 AbstractCegarLoop]: Abstraction has 4929 states and 8048 transitions. [2021-12-28 02:02:12,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:02:12,887 INFO L276 IsEmpty]: Start isEmpty. Operand 4929 states and 8048 transitions. [2021-12-28 02:02:12,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-28 02:02:12,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:02:12,893 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:02:12,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 02:02:12,893 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:02:12,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:02:12,894 INFO L85 PathProgramCache]: Analyzing trace with hash 770021099, now seen corresponding path program 1 times [2021-12-28 02:02:12,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:02:12,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785262261] [2021-12-28 02:02:12,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:02:12,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:02:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:12,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:02:12,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:12,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:02:12,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:12,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:02:12,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:12,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:02:12,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:13,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:02:13,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:13,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 02:02:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:13,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:02:13,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:13,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-28 02:02:13,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-28 02:02:13,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:02:13,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785262261] [2021-12-28 02:02:13,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785262261] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:02:13,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360326966] [2021-12-28 02:02:13,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:02:13,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:02:13,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:02:13,020 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) [2021-12-28 02:02:13,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 02:02:13,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:13,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 02:02:13,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:02:13,297 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-28 02:02:13,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:02:13,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360326966] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:02:13,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:02:13,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-28 02:02:13,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224116307] [2021-12-28 02:02:13,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:02:13,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:02:13,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:02:13,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:02:13,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:02:13,299 INFO L87 Difference]: Start difference. First operand 4929 states and 8048 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:02:13,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:02:13,434 INFO L93 Difference]: Finished difference Result 10380 states and 16066 transitions. [2021-12-28 02:02:13,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:02:13,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 111 [2021-12-28 02:02:13,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:02:13,463 INFO L225 Difference]: With dead ends: 10380 [2021-12-28 02:02:13,463 INFO L226 Difference]: Without dead ends: 7583 [2021-12-28 02:02:13,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:02:13,473 INFO L933 BasicCegarLoop]: 4162 mSDtfsCounter, 4110 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4110 SdHoareTripleChecker+Valid, 4333 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:02:13,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4110 Valid, 4333 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:02:13,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7583 states. [2021-12-28 02:02:13,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7583 to 7527. [2021-12-28 02:02:13,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7527 states, 6657 states have (on average 1.5841970857743728) internal successors, (10546), 6726 states have internal predecessors, (10546), 512 states have call successors, (512), 309 states have call predecessors, (512), 356 states have return successors, (745), 507 states have call predecessors, (745), 510 states have call successors, (745) [2021-12-28 02:02:13,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7527 states to 7527 states and 11803 transitions. [2021-12-28 02:02:13,678 INFO L78 Accepts]: Start accepts. Automaton has 7527 states and 11803 transitions. Word has length 111 [2021-12-28 02:02:13,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:02:13,679 INFO L470 AbstractCegarLoop]: Abstraction has 7527 states and 11803 transitions. [2021-12-28 02:02:13,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:02:13,680 INFO L276 IsEmpty]: Start isEmpty. Operand 7527 states and 11803 transitions. [2021-12-28 02:02:13,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-28 02:02:13,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:02:13,687 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:02:13,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 02:02:13,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:02:13,910 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:02:13,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:02:13,911 INFO L85 PathProgramCache]: Analyzing trace with hash -122535733, now seen corresponding path program 1 times [2021-12-28 02:02:13,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:02:13,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376711661] [2021-12-28 02:02:13,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:02:13,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:02:13,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:13,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:02:13,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:13,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:02:13,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:13,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:02:13,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:13,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:02:13,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:13,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:02:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:13,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 02:02:13,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:14,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:02:14,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:14,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-28 02:02:14,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:14,015 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-28 02:02:14,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:02:14,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376711661] [2021-12-28 02:02:14,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376711661] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:02:14,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341315338] [2021-12-28 02:02:14,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:02:14,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:02:14,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:02:14,018 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) [2021-12-28 02:02:14,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 02:02:14,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:14,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 02:02:14,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:02:14,251 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-28 02:02:14,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:02:14,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341315338] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:02:14,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:02:14,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 02:02:14,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108954915] [2021-12-28 02:02:14,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:02:14,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:02:14,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:02:14,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:02:14,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:02:14,254 INFO L87 Difference]: Start difference. First operand 7527 states and 11803 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 02:02:14,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:02:14,503 INFO L93 Difference]: Finished difference Result 17935 states and 27159 transitions. [2021-12-28 02:02:14,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:02:14,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 111 [2021-12-28 02:02:14,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:02:14,546 INFO L225 Difference]: With dead ends: 17935 [2021-12-28 02:02:14,546 INFO L226 Difference]: Without dead ends: 12541 [2021-12-28 02:02:14,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:02:14,566 INFO L933 BasicCegarLoop]: 4311 mSDtfsCounter, 154 mSDsluCounter, 4150 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 8461 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:02:14,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 8461 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:02:14,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12541 states. [2021-12-28 02:02:14,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12541 to 12541. [2021-12-28 02:02:14,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12541 states, 10858 states have (on average 1.5209983422361393) internal successors, (16515), 10976 states have internal predecessors, (16515), 977 states have call successors, (977), 609 states have call predecessors, (977), 704 states have return successors, (1596), 987 states have call predecessors, (1596), 975 states have call successors, (1596) [2021-12-28 02:02:14,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12541 states to 12541 states and 19088 transitions. [2021-12-28 02:02:14,987 INFO L78 Accepts]: Start accepts. Automaton has 12541 states and 19088 transitions. Word has length 111 [2021-12-28 02:02:14,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:02:14,988 INFO L470 AbstractCegarLoop]: Abstraction has 12541 states and 19088 transitions. [2021-12-28 02:02:14,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 02:02:14,988 INFO L276 IsEmpty]: Start isEmpty. Operand 12541 states and 19088 transitions. [2021-12-28 02:02:15,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-28 02:02:15,011 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:02:15,012 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:02:15,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 02:02:15,231 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,SelfDestructingSolverStorable7 [2021-12-28 02:02:15,232 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:02:15,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:02:15,232 INFO L85 PathProgramCache]: Analyzing trace with hash 327119452, now seen corresponding path program 1 times [2021-12-28 02:02:15,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:02:15,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960941736] [2021-12-28 02:02:15,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:02:15,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:02:15,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:15,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:02:15,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:15,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:02:15,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:15,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:02:15,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:15,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:02:15,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:15,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:02:15,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:15,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 02:02:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:15,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:02:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:15,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 02:02:15,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:15,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:02:15,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:15,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-28 02:02:15,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:15,337 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-28 02:02:15,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:02:15,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960941736] [2021-12-28 02:02:15,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960941736] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:02:15,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307065530] [2021-12-28 02:02:15,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:02:15,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:02:15,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:02:15,339 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) [2021-12-28 02:02:15,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 02:02:15,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:15,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 02:02:15,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:02:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-28 02:02:15,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:02:15,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307065530] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:02:15,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:02:15,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-28 02:02:15,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786656834] [2021-12-28 02:02:15,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:02:15,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:02:15,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:02:15,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:02:15,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:02:15,673 INFO L87 Difference]: Start difference. First operand 12541 states and 19088 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-28 02:02:16,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:02:16,161 INFO L93 Difference]: Finished difference Result 32917 states and 49009 transitions. [2021-12-28 02:02:16,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:02:16,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 143 [2021-12-28 02:02:16,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:02:16,238 INFO L225 Difference]: With dead ends: 32917 [2021-12-28 02:02:16,238 INFO L226 Difference]: Without dead ends: 22513 [2021-12-28 02:02:16,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:02:16,273 INFO L933 BasicCegarLoop]: 4183 mSDtfsCounter, 4068 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4068 SdHoareTripleChecker+Valid, 4354 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:02:16,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4068 Valid, 4354 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:02:16,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22513 states. [2021-12-28 02:02:16,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22513 to 22301. [2021-12-28 02:02:16,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22301 states, 19038 states have (on average 1.4810904506775922) internal successors, (28197), 19270 states have internal predecessors, (28197), 1871 states have call successors, (1871), 1199 states have call predecessors, (1871), 1390 states have return successors, (3038), 1863 states have call predecessors, (3038), 1869 states have call successors, (3038) [2021-12-28 02:02:17,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22301 states to 22301 states and 33106 transitions. [2021-12-28 02:02:17,032 INFO L78 Accepts]: Start accepts. Automaton has 22301 states and 33106 transitions. Word has length 143 [2021-12-28 02:02:17,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:02:17,034 INFO L470 AbstractCegarLoop]: Abstraction has 22301 states and 33106 transitions. [2021-12-28 02:02:17,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-28 02:02:17,034 INFO L276 IsEmpty]: Start isEmpty. Operand 22301 states and 33106 transitions. [2021-12-28 02:02:17,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-28 02:02:17,081 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:02:17,081 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:02:17,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 02:02:17,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:02:17,300 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:02:17,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:02:17,300 INFO L85 PathProgramCache]: Analyzing trace with hash 382011958, now seen corresponding path program 1 times [2021-12-28 02:02:17,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:02:17,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369856510] [2021-12-28 02:02:17,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:02:17,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:02:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:17,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:02:17,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:17,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:02:17,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:17,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:02:17,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:17,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:02:17,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:17,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:02:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:17,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 02:02:17,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:17,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-28 02:02:17,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:17,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:02:17,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:17,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-28 02:02:17,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:17,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:02:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:17,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-28 02:02:17,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:17,383 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-28 02:02:17,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:02:17,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369856510] [2021-12-28 02:02:17,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369856510] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:02:17,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603094752] [2021-12-28 02:02:17,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:02:17,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:02:17,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:02:17,385 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) [2021-12-28 02:02:17,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 02:02:17,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:17,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 02:02:17,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:02:17,620 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-28 02:02:17,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:02:17,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603094752] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:02:17,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:02:17,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 02:02:17,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958211458] [2021-12-28 02:02:17,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:02:17,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:02:17,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:02:17,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:02:17,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:02:17,622 INFO L87 Difference]: Start difference. First operand 22301 states and 33106 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-28 02:02:18,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:02:18,164 INFO L93 Difference]: Finished difference Result 44821 states and 66508 transitions. [2021-12-28 02:02:18,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:02:18,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 160 [2021-12-28 02:02:18,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:02:18,246 INFO L225 Difference]: With dead ends: 44821 [2021-12-28 02:02:18,247 INFO L226 Difference]: Without dead ends: 24655 [2021-12-28 02:02:18,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:02:18,298 INFO L933 BasicCegarLoop]: 4149 mSDtfsCounter, 4087 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4087 SdHoareTripleChecker+Valid, 4183 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:02:18,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4087 Valid, 4183 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:02:18,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24655 states. [2021-12-28 02:02:19,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24655 to 24655. [2021-12-28 02:02:19,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24655 states, 21180 states have (on average 1.4241265344664777) internal successors, (30163), 21412 states have internal predecessors, (30163), 1925 states have call successors, (1925), 1357 states have call predecessors, (1925), 1548 states have return successors, (3106), 1917 states have call predecessors, (3106), 1923 states have call successors, (3106) [2021-12-28 02:02:19,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24655 states to 24655 states and 35194 transitions. [2021-12-28 02:02:19,472 INFO L78 Accepts]: Start accepts. Automaton has 24655 states and 35194 transitions. Word has length 160 [2021-12-28 02:02:19,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:02:19,473 INFO L470 AbstractCegarLoop]: Abstraction has 24655 states and 35194 transitions. [2021-12-28 02:02:19,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-28 02:02:19,473 INFO L276 IsEmpty]: Start isEmpty. Operand 24655 states and 35194 transitions. [2021-12-28 02:02:19,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-28 02:02:19,525 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:02:19,525 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:02:19,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 02:02:19,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:02:19,747 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:02:19,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:02:19,748 INFO L85 PathProgramCache]: Analyzing trace with hash 228383827, now seen corresponding path program 1 times [2021-12-28 02:02:19,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:02:19,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829486911] [2021-12-28 02:02:19,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:02:19,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:02:19,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:19,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:02:19,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:19,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:02:19,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:19,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:02:19,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:19,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:02:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:19,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:02:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:19,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 02:02:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:19,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-28 02:02:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:19,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:02:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:19,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-28 02:02:19,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:19,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:02:19,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:19,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-28 02:02:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-28 02:02:19,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:02:19,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829486911] [2021-12-28 02:02:19,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829486911] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:02:19,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845245541] [2021-12-28 02:02:19,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:02:19,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:02:19,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:02:19,848 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 02:02:19,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 02:02:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:19,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 02:02:19,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:02:20,095 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-28 02:02:20,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:02:20,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845245541] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:02:20,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:02:20,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 02:02:20,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169628849] [2021-12-28 02:02:20,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:02:20,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:02:20,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:02:20,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:02:20,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:02:20,098 INFO L87 Difference]: Start difference. First operand 24655 states and 35194 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 02:02:20,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:02:20,818 INFO L93 Difference]: Finished difference Result 41688 states and 58732 transitions. [2021-12-28 02:02:20,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:02:20,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 160 [2021-12-28 02:02:20,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:02:20,897 INFO L225 Difference]: With dead ends: 41688 [2021-12-28 02:02:20,897 INFO L226 Difference]: Without dead ends: 26195 [2021-12-28 02:02:20,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:02:20,934 INFO L933 BasicCegarLoop]: 4171 mSDtfsCounter, 4088 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4088 SdHoareTripleChecker+Valid, 4349 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:02:20,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4088 Valid, 4349 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:02:20,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26195 states. [2021-12-28 02:02:21,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26195 to 26055. [2021-12-28 02:02:21,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26055 states, 22468 states have (on average 1.3989229125867901) internal successors, (31431), 22700 states have internal predecessors, (31431), 1945 states have call successors, (1945), 1449 states have call predecessors, (1945), 1640 states have return successors, (3218), 1937 states have call predecessors, (3218), 1943 states have call successors, (3218) [2021-12-28 02:02:21,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26055 states to 26055 states and 36594 transitions. [2021-12-28 02:02:21,845 INFO L78 Accepts]: Start accepts. Automaton has 26055 states and 36594 transitions. Word has length 160 [2021-12-28 02:02:21,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:02:21,845 INFO L470 AbstractCegarLoop]: Abstraction has 26055 states and 36594 transitions. [2021-12-28 02:02:21,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 02:02:21,846 INFO L276 IsEmpty]: Start isEmpty. Operand 26055 states and 36594 transitions. [2021-12-28 02:02:21,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-28 02:02:21,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:02:21,882 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:02:21,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 02:02:22,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-28 02:02:22,099 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:02:22,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:02:22,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1570525413, now seen corresponding path program 1 times [2021-12-28 02:02:22,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:02:22,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368359284] [2021-12-28 02:02:22,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:02:22,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:02:22,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:22,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:02:22,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:22,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:02:22,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:22,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:02:22,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:22,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:02:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:22,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:02:22,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:22,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 02:02:22,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:22,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:02:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:22,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-28 02:02:22,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:22,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-28 02:02:22,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:22,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:02:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:22,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-28 02:02:22,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:22,187 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-28 02:02:22,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:02:22,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368359284] [2021-12-28 02:02:22,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368359284] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:02:22,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737120476] [2021-12-28 02:02:22,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:02:22,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:02:22,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:02:22,189 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 02:02:22,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 02:02:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:22,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 02:02:22,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:02:22,413 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-28 02:02:22,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:02:22,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737120476] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:02:22,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:02:22,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 02:02:22,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187983993] [2021-12-28 02:02:22,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:02:22,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:02:22,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:02:22,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:02:22,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:02:22,416 INFO L87 Difference]: Start difference. First operand 26055 states and 36594 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-28 02:02:23,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:02:23,561 INFO L93 Difference]: Finished difference Result 72665 states and 101108 transitions. [2021-12-28 02:02:23,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:02:23,561 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 161 [2021-12-28 02:02:23,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:02:23,701 INFO L225 Difference]: With dead ends: 72665 [2021-12-28 02:02:23,701 INFO L226 Difference]: Without dead ends: 48749 [2021-12-28 02:02:23,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:02:23,755 INFO L933 BasicCegarLoop]: 4320 mSDtfsCounter, 163 mSDsluCounter, 4147 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 8467 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:02:23,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 8467 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:02:23,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48749 states. [2021-12-28 02:02:25,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48749 to 48705. [2021-12-28 02:02:25,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48705 states, 41704 states have (on average 1.3657442931133703) internal successors, (56957), 42166 states have internal predecessors, (56957), 3775 states have call successors, (3775), 2841 states have call predecessors, (3775), 3224 states have return successors, (7134), 3761 states have call predecessors, (7134), 3773 states have call successors, (7134) [2021-12-28 02:02:25,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48705 states to 48705 states and 67866 transitions. [2021-12-28 02:02:25,845 INFO L78 Accepts]: Start accepts. Automaton has 48705 states and 67866 transitions. Word has length 161 [2021-12-28 02:02:25,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:02:25,845 INFO L470 AbstractCegarLoop]: Abstraction has 48705 states and 67866 transitions. [2021-12-28 02:02:25,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-28 02:02:25,846 INFO L276 IsEmpty]: Start isEmpty. Operand 48705 states and 67866 transitions. [2021-12-28 02:02:25,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-28 02:02:25,919 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:02:25,919 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:02:25,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 02:02:26,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:02:26,136 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:02:26,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:02:26,136 INFO L85 PathProgramCache]: Analyzing trace with hash -948353227, now seen corresponding path program 1 times [2021-12-28 02:02:26,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:02:26,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714497013] [2021-12-28 02:02:26,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:02:26,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:02:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:26,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:02:26,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:26,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:02:26,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:26,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:02:26,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:26,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:02:26,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:26,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:02:26,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:26,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 02:02:26,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:26,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:02:26,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:26,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-28 02:02:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:26,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-28 02:02:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:26,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:02:26,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:26,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-28 02:02:26,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:26,217 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-28 02:02:26,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:02:26,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714497013] [2021-12-28 02:02:26,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714497013] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:02:26,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939676993] [2021-12-28 02:02:26,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:02:26,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:02:26,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:02:26,219 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 02:02:26,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 02:02:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:26,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 02:02:26,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:02:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-28 02:02:26,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:02:26,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939676993] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:02:26,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:02:26,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 02:02:26,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101693024] [2021-12-28 02:02:26,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:02:26,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:02:26,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:02:26,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:02:26,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:02:26,550 INFO L87 Difference]: Start difference. First operand 48705 states and 67866 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-28 02:02:27,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:02:27,976 INFO L93 Difference]: Finished difference Result 79069 states and 111521 transitions. [2021-12-28 02:02:27,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:02:27,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 161 [2021-12-28 02:02:27,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:02:28,170 INFO L225 Difference]: With dead ends: 79069 [2021-12-28 02:02:28,170 INFO L226 Difference]: Without dead ends: 41521 [2021-12-28 02:02:28,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:02:28,217 INFO L933 BasicCegarLoop]: 4148 mSDtfsCounter, 4082 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4082 SdHoareTripleChecker+Valid, 4181 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:02:28,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4082 Valid, 4181 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 02:02:28,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41521 states. [2021-12-28 02:02:29,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41521 to 30305. [2021-12-28 02:02:29,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30305 states, 26128 states have (on average 1.3429654011022658) internal successors, (35089), 26370 states have internal predecessors, (35089), 2255 states have call successors, (2255), 1729 states have call predecessors, (2255), 1920 states have return successors, (3778), 2237 states have call predecessors, (3778), 2253 states have call successors, (3778) [2021-12-28 02:02:29,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30305 states to 30305 states and 41122 transitions. [2021-12-28 02:02:29,557 INFO L78 Accepts]: Start accepts. Automaton has 30305 states and 41122 transitions. Word has length 161 [2021-12-28 02:02:29,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:02:29,557 INFO L470 AbstractCegarLoop]: Abstraction has 30305 states and 41122 transitions. [2021-12-28 02:02:29,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-28 02:02:29,557 INFO L276 IsEmpty]: Start isEmpty. Operand 30305 states and 41122 transitions. [2021-12-28 02:02:29,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-28 02:02:29,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:02:29,593 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:02:29,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-28 02:02:29,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:02:29,808 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:02:29,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:02:29,808 INFO L85 PathProgramCache]: Analyzing trace with hash -192882952, now seen corresponding path program 1 times [2021-12-28 02:02:29,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:02:29,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533188123] [2021-12-28 02:02:29,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:02:29,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:02:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:29,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:02:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:29,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:02:29,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:29,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:02:29,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:29,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:02:29,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:29,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:02:29,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:29,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 02:02:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:29,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:02:29,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:29,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-28 02:02:29,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:29,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-28 02:02:29,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:29,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:02:29,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:29,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-28 02:02:29,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:29,894 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-28 02:02:29,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:02:29,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533188123] [2021-12-28 02:02:29,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533188123] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:02:29,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799710290] [2021-12-28 02:02:29,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:02:29,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:02:29,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:02:29,895 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 02:02:29,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 02:02:29,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:29,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 02:02:29,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:02:30,112 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-28 02:02:30,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:02:30,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799710290] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:02:30,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:02:30,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 02:02:30,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690680281] [2021-12-28 02:02:30,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:02:30,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:02:30,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:02:30,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:02:30,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:02:30,114 INFO L87 Difference]: Start difference. First operand 30305 states and 41122 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-28 02:02:31,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:02:31,930 INFO L93 Difference]: Finished difference Result 82213 states and 110894 transitions. [2021-12-28 02:02:31,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:02:31,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 161 [2021-12-28 02:02:31,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:02:32,240 INFO L225 Difference]: With dead ends: 82213 [2021-12-28 02:02:32,241 INFO L226 Difference]: Without dead ends: 54057 [2021-12-28 02:02:32,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:02:32,282 INFO L933 BasicCegarLoop]: 4314 mSDtfsCounter, 150 mSDsluCounter, 4144 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 8458 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:02:32,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 8458 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:02:32,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54057 states. [2021-12-28 02:02:34,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54057 to 54053. [2021-12-28 02:02:34,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54053 states, 46184 states have (on average 1.3125974363415902) internal successors, (60621), 46666 states have internal predecessors, (60621), 4267 states have call successors, (4267), 3217 states have call predecessors, (4267), 3600 states have return successors, (8200), 4233 states have call predecessors, (8200), 4265 states have call successors, (8200) [2021-12-28 02:02:34,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54053 states to 54053 states and 73088 transitions. [2021-12-28 02:02:34,510 INFO L78 Accepts]: Start accepts. Automaton has 54053 states and 73088 transitions. Word has length 161 [2021-12-28 02:02:34,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:02:34,511 INFO L470 AbstractCegarLoop]: Abstraction has 54053 states and 73088 transitions. [2021-12-28 02:02:34,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-28 02:02:34,511 INFO L276 IsEmpty]: Start isEmpty. Operand 54053 states and 73088 transitions. [2021-12-28 02:02:34,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-28 02:02:34,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:02:34,574 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:02:34,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-28 02:02:34,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-28 02:02:34,787 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:02:34,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:02:34,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1491732838, now seen corresponding path program 1 times [2021-12-28 02:02:34,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:02:34,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620695809] [2021-12-28 02:02:34,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:02:34,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:02:34,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:34,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:02:34,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:34,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:02:34,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:34,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:02:34,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:34,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:02:34,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:34,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:02:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:34,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-28 02:02:34,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:34,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-28 02:02:34,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:34,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:02:34,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:34,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-28 02:02:34,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:34,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:02:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:34,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-28 02:02:34,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:34,877 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-28 02:02:34,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:02:34,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620695809] [2021-12-28 02:02:34,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620695809] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:02:34,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764778748] [2021-12-28 02:02:34,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:02:34,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:02:34,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:02:34,879 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 02:02:34,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-28 02:02:34,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:34,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 02:02:34,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:02:35,120 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-28 02:02:35,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:02:35,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764778748] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:02:35,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:02:35,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 02:02:35,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212055056] [2021-12-28 02:02:35,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:02:35,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:02:35,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:02:35,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:02:35,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:02:35,122 INFO L87 Difference]: Start difference. First operand 54053 states and 73088 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 02:02:36,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:02:36,974 INFO L93 Difference]: Finished difference Result 95015 states and 127828 transitions. [2021-12-28 02:02:36,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:02:36,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 161 [2021-12-28 02:02:36,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:02:37,116 INFO L225 Difference]: With dead ends: 95015 [2021-12-28 02:02:37,117 INFO L226 Difference]: Without dead ends: 54897 [2021-12-28 02:02:37,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:02:37,174 INFO L933 BasicCegarLoop]: 4186 mSDtfsCounter, 4108 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4108 SdHoareTripleChecker+Valid, 4357 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:02:37,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4108 Valid, 4357 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:02:37,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54897 states. [2021-12-28 02:02:39,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54897 to 54053. [2021-12-28 02:02:39,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54053 states, 46184 states have (on average 1.3048025290143772) internal successors, (60261), 46666 states have internal predecessors, (60261), 4267 states have call successors, (4267), 3217 states have call predecessors, (4267), 3600 states have return successors, (8200), 4233 states have call predecessors, (8200), 4265 states have call successors, (8200) [2021-12-28 02:02:39,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54053 states to 54053 states and 72728 transitions. [2021-12-28 02:02:39,542 INFO L78 Accepts]: Start accepts. Automaton has 54053 states and 72728 transitions. Word has length 161 [2021-12-28 02:02:39,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:02:39,543 INFO L470 AbstractCegarLoop]: Abstraction has 54053 states and 72728 transitions. [2021-12-28 02:02:39,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 02:02:39,543 INFO L276 IsEmpty]: Start isEmpty. Operand 54053 states and 72728 transitions. [2021-12-28 02:02:39,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-28 02:02:39,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:02:39,601 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:02:39,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-28 02:02:39,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-28 02:02:39,809 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:02:39,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:02:39,809 INFO L85 PathProgramCache]: Analyzing trace with hash -251057197, now seen corresponding path program 1 times [2021-12-28 02:02:39,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:02:39,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770467588] [2021-12-28 02:02:39,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:02:39,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:02:39,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:39,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:02:39,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:39,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:02:39,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:39,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:02:39,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:39,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:02:39,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:39,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:02:39,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:39,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-28 02:02:39,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:39,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-28 02:02:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:39,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:02:39,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:39,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-28 02:02:39,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:39,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:02:39,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:39,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-28 02:02:39,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:39,889 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-28 02:02:39,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:02:39,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770467588] [2021-12-28 02:02:39,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770467588] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:02:39,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566885693] [2021-12-28 02:02:39,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:02:39,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:02:39,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:02:39,891 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 02:02:39,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-28 02:02:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:39,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 02:02:39,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:02:40,168 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-28 02:02:40,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:02:40,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566885693] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:02:40,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:02:40,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 02:02:40,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082154723] [2021-12-28 02:02:40,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:02:40,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:02:40,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:02:40,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:02:40,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:02:40,170 INFO L87 Difference]: Start difference. First operand 54053 states and 72728 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 02:02:42,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:02:42,041 INFO L93 Difference]: Finished difference Result 94725 states and 126938 transitions. [2021-12-28 02:02:42,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:02:42,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 161 [2021-12-28 02:02:42,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:02:42,200 INFO L225 Difference]: With dead ends: 94725 [2021-12-28 02:02:42,201 INFO L226 Difference]: Without dead ends: 55449 [2021-12-28 02:02:42,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:02:42,272 INFO L933 BasicCegarLoop]: 4200 mSDtfsCounter, 4107 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4107 SdHoareTripleChecker+Valid, 4373 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:02:42,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4107 Valid, 4373 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:02:42,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55449 states. [2021-12-28 02:02:44,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55449 to 53933. [2021-12-28 02:02:44,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53933 states, 46064 states have (on average 1.2977813476901703) internal successors, (59781), 46546 states have internal predecessors, (59781), 4267 states have call successors, (4267), 3217 states have call predecessors, (4267), 3600 states have return successors, (8200), 4233 states have call predecessors, (8200), 4265 states have call successors, (8200) [2021-12-28 02:02:44,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53933 states to 53933 states and 72248 transitions. [2021-12-28 02:02:44,784 INFO L78 Accepts]: Start accepts. Automaton has 53933 states and 72248 transitions. Word has length 161 [2021-12-28 02:02:44,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:02:44,785 INFO L470 AbstractCegarLoop]: Abstraction has 53933 states and 72248 transitions. [2021-12-28 02:02:44,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 02:02:44,785 INFO L276 IsEmpty]: Start isEmpty. Operand 53933 states and 72248 transitions. [2021-12-28 02:02:44,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-28 02:02:44,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:02:44,840 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:02:44,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-28 02:02:45,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-28 02:02:45,044 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:02:45,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:02:45,044 INFO L85 PathProgramCache]: Analyzing trace with hash -2084105626, now seen corresponding path program 1 times [2021-12-28 02:02:45,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:02:45,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998156981] [2021-12-28 02:02:45,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:02:45,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:02:45,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:45,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:02:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:45,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:02:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:45,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:02:45,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:45,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:02:45,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:45,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 02:02:45,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:45,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-28 02:02:45,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:45,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-28 02:02:45,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:45,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:02:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:45,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-28 02:02:45,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:45,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 02:02:45,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:45,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-28 02:02:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:02:45,110 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-28 02:02:45,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:02:45,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998156981] [2021-12-28 02:02:45,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998156981] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:02:45,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:02:45,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:02:45,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949186144] [2021-12-28 02:02:45,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:02:45,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:02:45,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:02:45,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:02:45,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:02:45,112 INFO L87 Difference]: Start difference. First operand 53933 states and 72248 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-28 02:02:47,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:02:47,301 INFO L93 Difference]: Finished difference Result 103313 states and 136251 transitions. [2021-12-28 02:02:47,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 02:02:47,302 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 161 [2021-12-28 02:02:47,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:02:47,439 INFO L225 Difference]: With dead ends: 103313 [2021-12-28 02:02:47,440 INFO L226 Difference]: Without dead ends: 51525 [2021-12-28 02:02:47,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:02:47,518 INFO L933 BasicCegarLoop]: 4148 mSDtfsCounter, 296 mSDsluCounter, 12019 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 16167 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:02:47,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 16167 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 02:02:47,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51525 states.