./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/systemc/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/systemc/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 bc8487f898950b83c481f83a71342af68752fb6e7598d76df123761c32c89f72 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 01:03:29,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 01:03:29,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 01:03:29,687 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 01:03:29,687 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 01:03:29,690 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 01:03:29,690 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 01:03:29,694 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 01:03:29,696 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 01:03:29,699 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 01:03:29,700 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 01:03:29,701 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 01:03:29,701 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 01:03:29,703 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 01:03:29,704 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 01:03:29,706 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 01:03:29,706 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 01:03:29,707 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 01:03:29,710 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 01:03:29,715 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 01:03:29,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 01:03:29,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 01:03:29,717 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 01:03:29,719 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 01:03:29,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 01:03:29,723 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 01:03:29,723 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 01:03:29,724 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 01:03:29,725 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 01:03:29,725 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 01:03:29,726 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 01:03:29,726 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 01:03:29,727 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 01:03:29,727 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 01:03:29,728 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 01:03:29,728 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 01:03:29,729 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 01:03:29,729 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 01:03:29,729 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 01:03:29,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 01:03:29,731 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 01:03:29,732 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 01:03:29,764 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 01:03:29,765 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 01:03:29,766 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 01:03:29,766 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 01:03:29,767 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 01:03:29,767 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 01:03:29,768 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 01:03:29,768 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 01:03:29,768 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 01:03:29,768 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 01:03:29,769 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 01:03:29,769 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 01:03:29,769 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 01:03:29,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 01:03:29,769 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 01:03:29,769 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 01:03:29,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 01:03:29,770 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 01:03:29,770 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 01:03:29,770 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 01:03:29,770 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 01:03:29,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 01:03:29,770 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 01:03:29,770 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 01:03:29,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:03:29,771 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 01:03:29,771 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 01:03:29,771 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 01:03:29,771 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 01:03:29,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 01:03:29,772 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 01:03:29,772 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 01:03:29,772 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 01:03:29,772 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bc8487f898950b83c481f83a71342af68752fb6e7598d76df123761c32c89f72 [2021-12-28 01:03:30,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 01:03:30,049 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 01:03:30,051 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 01:03:30,052 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 01:03:30,059 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 01:03:30,061 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.02.cil-2.c [2021-12-28 01:03:30,105 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da15772ba/fd8e0dcb106d4cf599a057fdb2bca04d/FLAGbf837c087 [2021-12-28 01:03:30,513 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 01:03:30,516 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.02.cil-2.c [2021-12-28 01:03:30,526 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da15772ba/fd8e0dcb106d4cf599a057fdb2bca04d/FLAGbf837c087 [2021-12-28 01:03:30,537 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da15772ba/fd8e0dcb106d4cf599a057fdb2bca04d [2021-12-28 01:03:30,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 01:03:30,541 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 01:03:30,543 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 01:03:30,543 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 01:03:30,545 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 01:03:30,546 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:03:30" (1/1) ... [2021-12-28 01:03:30,547 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e8721cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:03:30, skipping insertion in model container [2021-12-28 01:03:30,547 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:03:30" (1/1) ... [2021-12-28 01:03:30,551 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 01:03:30,582 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 01:03:30,697 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.02.cil-2.c[671,684] [2021-12-28 01:03:30,777 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:03:30,791 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 01:03:30,803 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.02.cil-2.c[671,684] [2021-12-28 01:03:30,829 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:03:30,849 INFO L208 MainTranslator]: Completed translation [2021-12-28 01:03:30,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:03:30 WrapperNode [2021-12-28 01:03:30,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 01:03:30,852 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 01:03:30,852 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 01:03:30,852 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 01:03:30,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:03:30" (1/1) ... [2021-12-28 01:03:30,877 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:03:30" (1/1) ... [2021-12-28 01:03:30,907 INFO L137 Inliner]: procedures = 32, calls = 38, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 278 [2021-12-28 01:03:30,908 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 01:03:30,909 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 01:03:30,909 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 01:03:30,909 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 01:03:30,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:03:30" (1/1) ... [2021-12-28 01:03:30,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:03:30" (1/1) ... [2021-12-28 01:03:30,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:03:30" (1/1) ... [2021-12-28 01:03:30,916 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:03:30" (1/1) ... [2021-12-28 01:03:30,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:03:30" (1/1) ... [2021-12-28 01:03:30,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:03:30" (1/1) ... [2021-12-28 01:03:30,924 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:03:30" (1/1) ... [2021-12-28 01:03:30,926 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 01:03:30,926 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 01:03:30,926 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 01:03:30,927 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 01:03:30,927 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:03:30" (1/1) ... [2021-12-28 01:03:30,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:03:30,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:03:30,960 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 01:03:30,970 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 01:03:30,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 01:03:30,990 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-12-28 01:03:30,991 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-12-28 01:03:30,991 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-28 01:03:30,991 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-28 01:03:30,991 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-28 01:03:30,991 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-28 01:03:30,991 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-28 01:03:30,991 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-28 01:03:30,991 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-28 01:03:30,991 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-28 01:03:30,992 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-28 01:03:30,992 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-28 01:03:30,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 01:03:30,992 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-28 01:03:30,992 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-28 01:03:30,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 01:03:30,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 01:03:31,048 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 01:03:31,050 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 01:03:31,351 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 01:03:31,364 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 01:03:31,367 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-28 01:03:31,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:03:31 BoogieIcfgContainer [2021-12-28 01:03:31,369 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 01:03:31,371 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 01:03:31,371 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 01:03:31,373 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 01:03:31,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 01:03:30" (1/3) ... [2021-12-28 01:03:31,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26654074 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:03:31, skipping insertion in model container [2021-12-28 01:03:31,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:03:30" (2/3) ... [2021-12-28 01:03:31,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26654074 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:03:31, skipping insertion in model container [2021-12-28 01:03:31,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:03:31" (3/3) ... [2021-12-28 01:03:31,375 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.02.cil-2.c [2021-12-28 01:03:31,379 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 01:03:31,379 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 01:03:31,408 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 01:03:31,413 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 01:03:31,413 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 01:03:31,431 INFO L276 IsEmpty]: Start isEmpty. Operand has 140 states, 113 states have (on average 1.584070796460177) internal successors, (179), 117 states have internal predecessors, (179), 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 01:03:31,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 01:03:31,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:03:31,437 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] [2021-12-28 01:03:31,437 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:03:31,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:03:31,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1053890287, now seen corresponding path program 1 times [2021-12-28 01:03:31,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:03:31,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418907750] [2021-12-28 01:03:31,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:31,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:03:31,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:31,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:03:31,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:31,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:03:31,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:31,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:03:31,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:31,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 01:03:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:31,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 01:03:31,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:31,671 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 01:03:31,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:03:31,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418907750] [2021-12-28 01:03:31,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418907750] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:03:31,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:03:31,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:03:31,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654335396] [2021-12-28 01:03:31,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:03:31,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:03:31,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:03:31,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:03:31,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:03:31,696 INFO L87 Difference]: Start difference. First operand has 140 states, 113 states have (on average 1.584070796460177) internal successors, (179), 117 states have internal predecessors, (179), 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 5 states, 5 states have (on average 11.4) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:03:32,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:03:32,076 INFO L93 Difference]: Finished difference Result 304 states and 476 transitions. [2021-12-28 01:03:32,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:03:32,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-28 01:03:32,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:03:32,085 INFO L225 Difference]: With dead ends: 304 [2021-12-28 01:03:32,089 INFO L226 Difference]: Without dead ends: 166 [2021-12-28 01:03:32,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:03:32,094 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 298 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:03:32,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 367 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 01:03:32,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-12-28 01:03:32,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 134. [2021-12-28 01:03:32,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 109 states have (on average 1.4862385321100917) internal successors, (162), 111 states have internal predecessors, (162), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-28 01:03:32,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 196 transitions. [2021-12-28 01:03:32,128 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 196 transitions. Word has length 68 [2021-12-28 01:03:32,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:03:32,128 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 196 transitions. [2021-12-28 01:03:32,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:03:32,128 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 196 transitions. [2021-12-28 01:03:32,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 01:03:32,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:03:32,130 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] [2021-12-28 01:03:32,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 01:03:32,130 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:03:32,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:03:32,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1279502351, now seen corresponding path program 1 times [2021-12-28 01:03:32,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:03:32,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847422483] [2021-12-28 01:03:32,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:32,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:03:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:32,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:03:32,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:32,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:03:32,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:32,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:03:32,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:32,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 01:03:32,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:32,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 01:03:32,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:32,246 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 01:03:32,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:03:32,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847422483] [2021-12-28 01:03:32,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847422483] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:03:32,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:03:32,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:03:32,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055830704] [2021-12-28 01:03:32,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:03:32,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:03:32,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:03:32,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:03:32,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:03:32,249 INFO L87 Difference]: Start difference. First operand 134 states and 196 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (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 01:03:32,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:03:32,748 INFO L93 Difference]: Finished difference Result 444 states and 667 transitions. [2021-12-28 01:03:32,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 01:03:32,749 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (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 68 [2021-12-28 01:03:32,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:03:32,756 INFO L225 Difference]: With dead ends: 444 [2021-12-28 01:03:32,756 INFO L226 Difference]: Without dead ends: 320 [2021-12-28 01:03:32,757 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 01:03:32,758 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 419 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 01:03:32,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 572 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 01:03:32,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-12-28 01:03:32,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 255. [2021-12-28 01:03:32,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 212 states have (on average 1.5) internal successors, (318), 215 states have internal predecessors, (318), 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 01:03:32,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 377 transitions. [2021-12-28 01:03:32,782 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 377 transitions. Word has length 68 [2021-12-28 01:03:32,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:03:32,783 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 377 transitions. [2021-12-28 01:03:32,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (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 01:03:32,783 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 377 transitions. [2021-12-28 01:03:32,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 01:03:32,784 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:03:32,785 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] [2021-12-28 01:03:32,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 01:03:32,785 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:03:32,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:03:32,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1382216715, now seen corresponding path program 1 times [2021-12-28 01:03:32,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:03:32,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020510657] [2021-12-28 01:03:32,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:32,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:03:32,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:32,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:03:32,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:32,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:03:32,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:32,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:03:32,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:32,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 01:03:32,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:32,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 01:03:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:32,883 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 01:03:32,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:03:32,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020510657] [2021-12-28 01:03:32,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020510657] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:03:32,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:03:32,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:03:32,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058441094] [2021-12-28 01:03:32,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:03:32,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:03:32,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:03:32,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:03:32,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:03:32,885 INFO L87 Difference]: Start difference. First operand 255 states and 377 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (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 01:03:33,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:03:33,607 INFO L93 Difference]: Finished difference Result 717 states and 1071 transitions. [2021-12-28 01:03:33,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 01:03:33,608 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (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 68 [2021-12-28 01:03:33,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:03:33,614 INFO L225 Difference]: With dead ends: 717 [2021-12-28 01:03:33,614 INFO L226 Difference]: Without dead ends: 472 [2021-12-28 01:03:33,615 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 01:03:33,621 INFO L933 BasicCegarLoop]: 311 mSDtfsCounter, 407 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 01:03:33,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 986 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-28 01:03:33,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-12-28 01:03:33,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 369. [2021-12-28 01:03:33,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 308 states have (on average 1.4935064935064934) internal successors, (460), 312 states have internal predecessors, (460), 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 01:03:33,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 543 transitions. [2021-12-28 01:03:33,666 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 543 transitions. Word has length 68 [2021-12-28 01:03:33,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:03:33,667 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 543 transitions. [2021-12-28 01:03:33,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (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 01:03:33,667 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 543 transitions. [2021-12-28 01:03:33,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 01:03:33,673 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:03:33,674 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] [2021-12-28 01:03:33,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 01:03:33,674 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:03:33,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:03:33,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1525965171, now seen corresponding path program 1 times [2021-12-28 01:03:33,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:03:33,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075233] [2021-12-28 01:03:33,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:33,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:03:33,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:33,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:03:33,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:33,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:03:33,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:33,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:03:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:33,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 01:03:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:33,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 01:03:33,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:33,749 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 01:03:33,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:03:33,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075233] [2021-12-28 01:03:33,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075233] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:03:33,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:03:33,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:03:33,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662339344] [2021-12-28 01:03:33,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:03:33,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:03:33,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:03:33,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:03:33,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:03:33,753 INFO L87 Difference]: Start difference. First operand 369 states and 543 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (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 01:03:34,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:03:34,338 INFO L93 Difference]: Finished difference Result 1118 states and 1665 transitions. [2021-12-28 01:03:34,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 01:03:34,339 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (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 68 [2021-12-28 01:03:34,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:03:34,342 INFO L225 Difference]: With dead ends: 1118 [2021-12-28 01:03:34,342 INFO L226 Difference]: Without dead ends: 759 [2021-12-28 01:03:34,343 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 01:03:34,344 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 441 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 01:03:34,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 683 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 01:03:34,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-12-28 01:03:34,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 598. [2021-12-28 01:03:34,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 501 states have (on average 1.4870259481037924) internal successors, (745), 507 states have internal predecessors, (745), 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 01:03:34,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 880 transitions. [2021-12-28 01:03:34,367 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 880 transitions. Word has length 68 [2021-12-28 01:03:34,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:03:34,367 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 880 transitions. [2021-12-28 01:03:34,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (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 01:03:34,367 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 880 transitions. [2021-12-28 01:03:34,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 01:03:34,368 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:03:34,368 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] [2021-12-28 01:03:34,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 01:03:34,368 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:03:34,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:03:34,369 INFO L85 PathProgramCache]: Analyzing trace with hash -649946165, now seen corresponding path program 1 times [2021-12-28 01:03:34,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:03:34,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204531357] [2021-12-28 01:03:34,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:34,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:03:34,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:34,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:03:34,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:34,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:03:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:34,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:03:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:34,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 01:03:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:34,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 01:03:34,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:34,437 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 01:03:34,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:03:34,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204531357] [2021-12-28 01:03:34,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204531357] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:03:34,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:03:34,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:03:34,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696313998] [2021-12-28 01:03:34,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:03:34,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:03:34,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:03:34,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:03:34,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:03:34,439 INFO L87 Difference]: Start difference. First operand 598 states and 880 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (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 01:03:35,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:03:35,079 INFO L93 Difference]: Finished difference Result 1992 states and 2956 transitions. [2021-12-28 01:03:35,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 01:03:35,079 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (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 68 [2021-12-28 01:03:35,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:03:35,087 INFO L225 Difference]: With dead ends: 1992 [2021-12-28 01:03:35,087 INFO L226 Difference]: Without dead ends: 1404 [2021-12-28 01:03:35,089 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 01:03:35,092 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 413 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 01:03:35,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 984 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 01:03:35,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-12-28 01:03:35,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1010. [2021-12-28 01:03:35,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 845 states have (on average 1.4733727810650887) internal successors, (1245), 855 states have internal predecessors, (1245), 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 01:03:35,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1482 transitions. [2021-12-28 01:03:35,167 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1482 transitions. Word has length 68 [2021-12-28 01:03:35,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:03:35,167 INFO L470 AbstractCegarLoop]: Abstraction has 1010 states and 1482 transitions. [2021-12-28 01:03:35,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (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 01:03:35,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1482 transitions. [2021-12-28 01:03:35,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 01:03:35,169 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:03:35,169 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] [2021-12-28 01:03:35,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 01:03:35,169 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:03:35,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:03:35,170 INFO L85 PathProgramCache]: Analyzing trace with hash 888393865, now seen corresponding path program 1 times [2021-12-28 01:03:35,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:03:35,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052426682] [2021-12-28 01:03:35,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:35,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:03:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:35,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:03:35,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:35,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:03:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:35,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:03:35,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:35,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 01:03:35,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:35,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 01:03:35,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:35,235 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 01:03:35,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:03:35,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052426682] [2021-12-28 01:03:35,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052426682] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:03:35,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:03:35,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:03:35,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836692845] [2021-12-28 01:03:35,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:03:35,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:03:35,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:03:35,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:03:35,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:03:35,238 INFO L87 Difference]: Start difference. First operand 1010 states and 1482 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (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 01:03:35,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:03:35,846 INFO L93 Difference]: Finished difference Result 3390 states and 4996 transitions. [2021-12-28 01:03:35,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 01:03:35,847 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (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 68 [2021-12-28 01:03:35,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:03:35,855 INFO L225 Difference]: With dead ends: 3390 [2021-12-28 01:03:35,855 INFO L226 Difference]: Without dead ends: 2390 [2021-12-28 01:03:35,858 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 01:03:35,858 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 418 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 01:03:35,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 956 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 01:03:35,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2390 states. [2021-12-28 01:03:35,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2390 to 1867. [2021-12-28 01:03:35,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1570 states have (on average 1.4745222929936306) internal successors, (2315), 1588 states have internal predecessors, (2315), 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 01:03:35,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 2766 transitions. [2021-12-28 01:03:35,944 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 2766 transitions. Word has length 68 [2021-12-28 01:03:35,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:03:35,945 INFO L470 AbstractCegarLoop]: Abstraction has 1867 states and 2766 transitions. [2021-12-28 01:03:35,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (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 01:03:35,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 2766 transitions. [2021-12-28 01:03:35,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 01:03:35,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:03:35,947 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] [2021-12-28 01:03:35,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 01:03:35,948 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:03:35,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:03:35,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1140192245, now seen corresponding path program 1 times [2021-12-28 01:03:35,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:03:35,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001892227] [2021-12-28 01:03:35,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:35,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:03:35,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:35,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:03:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:35,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:03:35,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:36,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:03:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:36,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 01:03:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:36,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 01:03:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:36,030 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 01:03:36,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:03:36,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001892227] [2021-12-28 01:03:36,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001892227] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:03:36,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:03:36,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:03:36,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745111609] [2021-12-28 01:03:36,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:03:36,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:03:36,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:03:36,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:03:36,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:03:36,035 INFO L87 Difference]: Start difference. First operand 1867 states and 2766 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (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 01:03:36,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:03:36,576 INFO L93 Difference]: Finished difference Result 5251 states and 7801 transitions. [2021-12-28 01:03:36,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 01:03:36,577 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (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 68 [2021-12-28 01:03:36,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:03:36,591 INFO L225 Difference]: With dead ends: 5251 [2021-12-28 01:03:36,591 INFO L226 Difference]: Without dead ends: 3395 [2021-12-28 01:03:36,597 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 01:03:36,600 INFO L933 BasicCegarLoop]: 353 mSDtfsCounter, 541 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 01:03:36,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [566 Valid, 746 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 01:03:36,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2021-12-28 01:03:36,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 2808. [2021-12-28 01:03:36,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2808 states, 2353 states have (on average 1.4526136846578837) internal successors, (3418), 2388 states have internal predecessors, (3418), 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 01:03:36,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2808 states to 2808 states and 4089 transitions. [2021-12-28 01:03:36,722 INFO L78 Accepts]: Start accepts. Automaton has 2808 states and 4089 transitions. Word has length 68 [2021-12-28 01:03:36,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:03:36,723 INFO L470 AbstractCegarLoop]: Abstraction has 2808 states and 4089 transitions. [2021-12-28 01:03:36,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (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 01:03:36,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2808 states and 4089 transitions. [2021-12-28 01:03:36,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-28 01:03:36,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:03:36,733 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] [2021-12-28 01:03:36,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 01:03:36,733 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:03:36,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:03:36,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1415706776, now seen corresponding path program 1 times [2021-12-28 01:03:36,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:03:36,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828454848] [2021-12-28 01:03:36,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:36,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:03:36,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:36,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:03:36,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:36,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:03:36,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:36,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:03:36,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:36,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 01:03:36,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:36,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 01:03:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:36,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-28 01:03:36,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:36,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:03:36,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:36,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-28 01:03:36,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:36,847 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 01:03:36,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:03:36,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828454848] [2021-12-28 01:03:36,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828454848] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:03:36,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184483809] [2021-12-28 01:03:36,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:36,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:03:36,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:03:36,849 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 01:03:36,864 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 01:03:36,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:36,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 01:03:36,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:03:37,184 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 01:03:37,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:03:37,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184483809] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:03:37,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:03:37,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-28 01:03:37,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587787262] [2021-12-28 01:03:37,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:03:37,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:03:37,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:03:37,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:03:37,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:03:37,187 INFO L87 Difference]: Start difference. First operand 2808 states and 4089 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (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 01:03:37,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:03:37,355 INFO L93 Difference]: Finished difference Result 8259 states and 12107 transitions. [2021-12-28 01:03:37,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:03:37,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (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 110 [2021-12-28 01:03:37,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:03:37,378 INFO L225 Difference]: With dead ends: 8259 [2021-12-28 01:03:37,378 INFO L226 Difference]: Without dead ends: 5462 [2021-12-28 01:03:37,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 125 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 01:03:37,387 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 152 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 374 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 01:03:37,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 374 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:03:37,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5462 states. [2021-12-28 01:03:37,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5462 to 5406. [2021-12-28 01:03:37,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5406 states, 4537 states have (on average 1.451840423187128) internal successors, (6587), 4605 states have internal predecessors, (6587), 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 01:03:37,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5406 states to 5406 states and 7844 transitions. [2021-12-28 01:03:37,612 INFO L78 Accepts]: Start accepts. Automaton has 5406 states and 7844 transitions. Word has length 110 [2021-12-28 01:03:37,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:03:37,612 INFO L470 AbstractCegarLoop]: Abstraction has 5406 states and 7844 transitions. [2021-12-28 01:03:37,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (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 01:03:37,612 INFO L276 IsEmpty]: Start isEmpty. Operand 5406 states and 7844 transitions. [2021-12-28 01:03:37,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-28 01:03:37,620 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:03:37,620 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] [2021-12-28 01:03:37,646 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 01:03:37,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:03:37,827 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:03:37,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:03:37,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1986703688, now seen corresponding path program 1 times [2021-12-28 01:03:37,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:03:37,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426485754] [2021-12-28 01:03:37,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:37,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:03:37,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:37,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:03:37,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:37,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:03:37,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:37,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:03:37,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:37,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 01:03:37,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:37,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 01:03:37,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:37,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-28 01:03:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:37,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:03:37,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:37,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-28 01:03:37,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:37,900 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 01:03:37,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:03:37,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426485754] [2021-12-28 01:03:37,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426485754] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:03:37,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700997830] [2021-12-28 01:03:37,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:37,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:03:37,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:03:37,902 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 01:03:37,908 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 01:03:37,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:37,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 01:03:37,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:03:38,085 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 01:03:38,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:03:38,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700997830] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:03:38,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:03:38,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 01:03:38,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583385116] [2021-12-28 01:03:38,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:03:38,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:03:38,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:03:38,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:03:38,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:03:38,088 INFO L87 Difference]: Start difference. First operand 5406 states and 7844 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 01:03:38,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:03:38,290 INFO L93 Difference]: Finished difference Result 9176 states and 13438 transitions. [2021-12-28 01:03:38,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:03:38,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 110 [2021-12-28 01:03:38,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:03:38,316 INFO L225 Difference]: With dead ends: 9176 [2021-12-28 01:03:38,317 INFO L226 Difference]: Without dead ends: 7157 [2021-12-28 01:03:38,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 125 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 01:03:38,324 INFO L933 BasicCegarLoop]: 344 mSDtfsCounter, 143 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:03:38,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 535 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:03:38,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7157 states. [2021-12-28 01:03:38,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7157 to 7157. [2021-12-28 01:03:38,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7157 states, 6007 states have (on average 1.4486432495422008) internal successors, (8702), 6091 states have internal predecessors, (8702), 673 states have call successors, (673), 413 states have call predecessors, (673), 476 states have return successors, (1015), 668 states have call predecessors, (1015), 671 states have call successors, (1015) [2021-12-28 01:03:38,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7157 states to 7157 states and 10390 transitions. [2021-12-28 01:03:38,635 INFO L78 Accepts]: Start accepts. Automaton has 7157 states and 10390 transitions. Word has length 110 [2021-12-28 01:03:38,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:03:38,635 INFO L470 AbstractCegarLoop]: Abstraction has 7157 states and 10390 transitions. [2021-12-28 01:03:38,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 01:03:38,636 INFO L276 IsEmpty]: Start isEmpty. Operand 7157 states and 10390 transitions. [2021-12-28 01:03:38,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-28 01:03:38,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:03:38,650 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] [2021-12-28 01:03:38,671 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 01:03:38,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-28 01:03:38,873 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:03:38,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:03:38,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1976353697, now seen corresponding path program 1 times [2021-12-28 01:03:38,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:03:38,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784929830] [2021-12-28 01:03:38,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:38,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:03:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:38,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:03:38,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:38,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:03:38,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:38,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:03:38,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:38,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 01:03:38,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:38,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 01:03:38,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:38,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-28 01:03:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:38,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:03:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:38,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-28 01:03:38,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:38,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:03:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:38,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-28 01:03:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:38,971 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 01:03:38,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:03:38,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784929830] [2021-12-28 01:03:38,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784929830] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:03:38,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312949616] [2021-12-28 01:03:38,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:38,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:03:38,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:03:38,973 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 01:03:38,974 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 01:03:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:39,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 01:03:39,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:03:39,290 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 01:03:39,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:03:39,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312949616] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:03:39,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:03:39,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-28 01:03:39,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306525920] [2021-12-28 01:03:39,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:03:39,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:03:39,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:03:39,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:03:39,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:03:39,292 INFO L87 Difference]: Start difference. First operand 7157 states and 10390 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (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 01:03:39,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:03:39,668 INFO L93 Difference]: Finished difference Result 21167 states and 30956 transitions. [2021-12-28 01:03:39,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:03:39,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (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 142 [2021-12-28 01:03:39,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:03:39,731 INFO L225 Difference]: With dead ends: 21167 [2021-12-28 01:03:39,732 INFO L226 Difference]: Without dead ends: 14021 [2021-12-28 01:03:39,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 161 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 01:03:39,755 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 110 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 395 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 01:03:39,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 395 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:03:39,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14021 states. [2021-12-28 01:03:40,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14021 to 13877. [2021-12-28 01:03:40,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13877 states, 11640 states have (on average 1.4448453608247422) internal successors, (16818), 11806 states have internal predecessors, (16818), 1293 states have call successors, (1293), 816 states have call predecessors, (1293), 943 states have return successors, (1949), 1270 states have call predecessors, (1949), 1291 states have call successors, (1949) [2021-12-28 01:03:40,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13877 states to 13877 states and 20060 transitions. [2021-12-28 01:03:40,396 INFO L78 Accepts]: Start accepts. Automaton has 13877 states and 20060 transitions. Word has length 142 [2021-12-28 01:03:40,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:03:40,397 INFO L470 AbstractCegarLoop]: Abstraction has 13877 states and 20060 transitions. [2021-12-28 01:03:40,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (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 01:03:40,398 INFO L276 IsEmpty]: Start isEmpty. Operand 13877 states and 20060 transitions. [2021-12-28 01:03:40,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-28 01:03:40,424 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:03:40,424 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:03:40,442 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 01:03:40,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:03:40,643 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:03:40,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:03:40,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1687241086, now seen corresponding path program 1 times [2021-12-28 01:03:40,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:03:40,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103594194] [2021-12-28 01:03:40,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:40,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:03:40,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:40,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:03:40,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:40,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:03:40,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:40,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:03:40,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:40,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 01:03:40,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:40,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 01:03:40,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:40,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-28 01:03:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:40,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-28 01:03:40,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:40,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:03:40,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:40,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-28 01:03:40,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:40,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:03:40,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:40,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-28 01:03:40,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:40,768 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 01:03:40,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:03:40,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103594194] [2021-12-28 01:03:40,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103594194] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:03:40,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339526236] [2021-12-28 01:03:40,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:40,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:03:40,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:03:40,771 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 01:03:40,791 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 01:03:40,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:40,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 01:03:40,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:03:41,037 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 01:03:41,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:03:41,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339526236] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:03:41,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:03:41,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 01:03:41,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662200370] [2021-12-28 01:03:41,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:03:41,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:03:41,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:03:41,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:03:41,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:03:41,040 INFO L87 Difference]: Start difference. First operand 13877 states and 20060 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 3 states have call successors, (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 01:03:41,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:03:41,492 INFO L93 Difference]: Finished difference Result 29372 states and 43088 transitions. [2021-12-28 01:03:41,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:03:41,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 159 [2021-12-28 01:03:41,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:03:41,539 INFO L225 Difference]: With dead ends: 29372 [2021-12-28 01:03:41,539 INFO L226 Difference]: Without dead ends: 15505 [2021-12-28 01:03:41,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:03:41,573 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 128 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 224 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 01:03:41,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 224 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:03:41,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15505 states. [2021-12-28 01:03:42,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15505 to 15505. [2021-12-28 01:03:42,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15505 states, 13108 states have (on average 1.3864815379920659) internal successors, (18174), 13274 states have internal predecessors, (18174), 1338 states have call successors, (1338), 931 states have call predecessors, (1338), 1058 states have return successors, (1999), 1315 states have call predecessors, (1999), 1336 states have call successors, (1999) [2021-12-28 01:03:42,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15505 states to 15505 states and 21511 transitions. [2021-12-28 01:03:42,154 INFO L78 Accepts]: Start accepts. Automaton has 15505 states and 21511 transitions. Word has length 159 [2021-12-28 01:03:42,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:03:42,155 INFO L470 AbstractCegarLoop]: Abstraction has 15505 states and 21511 transitions. [2021-12-28 01:03:42,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 3 states have call successors, (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 01:03:42,155 INFO L276 IsEmpty]: Start isEmpty. Operand 15505 states and 21511 transitions. [2021-12-28 01:03:42,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-28 01:03:42,183 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:03:42,183 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] [2021-12-28 01:03:42,202 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 01:03:42,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:03:42,400 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:03:42,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:03:42,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1840869217, now seen corresponding path program 1 times [2021-12-28 01:03:42,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:03:42,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296781407] [2021-12-28 01:03:42,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:42,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:03:42,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:42,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:03:42,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:42,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:03:42,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:42,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:03:42,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:42,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 01:03:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:42,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 01:03:42,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:42,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-28 01:03:42,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:42,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-28 01:03:42,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:42,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:03:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:42,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-28 01:03:42,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:42,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:03:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:42,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-28 01:03:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:42,528 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 01:03:42,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:03:42,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296781407] [2021-12-28 01:03:42,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296781407] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:03:42,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736739725] [2021-12-28 01:03:42,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:42,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:03:42,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:03:42,530 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 01:03:42,541 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 01:03:42,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:42,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 01:03:42,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:03:42,813 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 01:03:42,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:03:42,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736739725] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:03:42,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:03:42,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 01:03:42,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809604688] [2021-12-28 01:03:42,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:03:42,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:03:42,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:03:42,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:03:42,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:03:42,816 INFO L87 Difference]: Start difference. First operand 15505 states and 21511 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (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 01:03:43,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:03:43,414 INFO L93 Difference]: Finished difference Result 32538 states and 45049 transitions. [2021-12-28 01:03:43,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:03:43,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (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 159 [2021-12-28 01:03:43,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:03:43,469 INFO L225 Difference]: With dead ends: 32538 [2021-12-28 01:03:43,470 INFO L226 Difference]: Without dead ends: 17045 [2021-12-28 01:03:43,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:03:43,504 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 130 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:03:43,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 374 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:03:43,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17045 states. [2021-12-28 01:03:44,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17045 to 16905. [2021-12-28 01:03:44,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16905 states, 14396 states have (on average 1.3505140316754654) internal successors, (19442), 14562 states have internal predecessors, (19442), 1358 states have call successors, (1358), 1023 states have call predecessors, (1358), 1150 states have return successors, (2111), 1335 states have call predecessors, (2111), 1356 states have call successors, (2111) [2021-12-28 01:03:44,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16905 states to 16905 states and 22911 transitions. [2021-12-28 01:03:44,164 INFO L78 Accepts]: Start accepts. Automaton has 16905 states and 22911 transitions. Word has length 159 [2021-12-28 01:03:44,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:03:44,164 INFO L470 AbstractCegarLoop]: Abstraction has 16905 states and 22911 transitions. [2021-12-28 01:03:44,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (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 01:03:44,165 INFO L276 IsEmpty]: Start isEmpty. Operand 16905 states and 22911 transitions. [2021-12-28 01:03:44,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-28 01:03:44,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:03:44,201 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] [2021-12-28 01:03:44,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-28 01:03:44,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-28 01:03:44,415 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:03:44,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:03:44,416 INFO L85 PathProgramCache]: Analyzing trace with hash 740866845, now seen corresponding path program 1 times [2021-12-28 01:03:44,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:03:44,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614907367] [2021-12-28 01:03:44,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:44,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:03:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:44,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:03:44,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:44,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:03:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:44,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:03:44,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:44,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 01:03:44,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:44,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 01:03:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:44,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-28 01:03:44,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:44,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:03:44,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:44,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-28 01:03:44,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:44,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-28 01:03:44,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:44,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:03:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:44,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-28 01:03:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:44,502 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 01:03:44,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:03:44,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614907367] [2021-12-28 01:03:44,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614907367] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:03:44,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673110563] [2021-12-28 01:03:44,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:44,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:03:44,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:03:44,504 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 01:03:44,507 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 01:03:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:44,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 01:03:44,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:03:44,756 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 01:03:44,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:03:44,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673110563] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:03:44,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:03:44,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 01:03:44,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423751373] [2021-12-28 01:03:44,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:03:44,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:03:44,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:03:44,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:03:44,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:03:44,758 INFO L87 Difference]: Start difference. First operand 16905 states and 22911 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 3 states have call successors, (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 01:03:45,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:03:45,731 INFO L93 Difference]: Finished difference Result 49878 states and 68158 transitions. [2021-12-28 01:03:45,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:03:45,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 3 states have call successors, (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 160 [2021-12-28 01:03:45,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:03:45,822 INFO L225 Difference]: With dead ends: 49878 [2021-12-28 01:03:45,823 INFO L226 Difference]: Without dead ends: 32985 [2021-12-28 01:03:45,848 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 01:03:45,849 INFO L933 BasicCegarLoop]: 361 mSDtfsCounter, 163 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:03:45,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 549 Invalid, 13 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:03:45,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32985 states. [2021-12-28 01:03:47,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32985 to 32941. [2021-12-28 01:03:47,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32941 states, 28041 states have (on average 1.3411076637780392) internal successors, (37606), 28372 states have internal predecessors, (37606), 2637 states have call successors, (2637), 2007 states have call predecessors, (2637), 2262 states have return successors, (4710), 2593 states have call predecessors, (4710), 2635 states have call successors, (4710) [2021-12-28 01:03:47,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32941 states to 32941 states and 44953 transitions. [2021-12-28 01:03:47,154 INFO L78 Accepts]: Start accepts. Automaton has 32941 states and 44953 transitions. Word has length 160 [2021-12-28 01:03:47,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:03:47,154 INFO L470 AbstractCegarLoop]: Abstraction has 32941 states and 44953 transitions. [2021-12-28 01:03:47,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 3 states have call successors, (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 01:03:47,155 INFO L276 IsEmpty]: Start isEmpty. Operand 32941 states and 44953 transitions. [2021-12-28 01:03:47,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-28 01:03:47,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:03:47,202 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] [2021-12-28 01:03:47,221 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 01:03:47,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:03:47,415 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:03:47,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:03:47,416 INFO L85 PathProgramCache]: Analyzing trace with hash 2091960737, now seen corresponding path program 1 times [2021-12-28 01:03:47,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:03:47,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673915571] [2021-12-28 01:03:47,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:47,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:03:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:47,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:03:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:47,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:03:47,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:47,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:03:47,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:47,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 01:03:47,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:47,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 01:03:47,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:47,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-28 01:03:47,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:47,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:03:47,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:47,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-28 01:03:47,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:47,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-28 01:03:47,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:47,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:03:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:47,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-28 01:03:47,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:47,507 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 01:03:47,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:03:47,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673915571] [2021-12-28 01:03:47,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673915571] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:03:47,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106377200] [2021-12-28 01:03:47,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:47,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:03:47,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:03:47,509 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 01:03:47,510 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 01:03:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:47,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 01:03:47,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:03:47,814 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 01:03:47,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:03:47,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106377200] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:03:47,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:03:47,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 01:03:47,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482571750] [2021-12-28 01:03:47,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:03:47,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:03:47,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:03:47,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:03:47,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:03:47,816 INFO L87 Difference]: Start difference. First operand 32941 states and 44953 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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 01:03:48,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:03:48,827 INFO L93 Difference]: Finished difference Result 54646 states and 75917 transitions. [2021-12-28 01:03:48,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:03:48,827 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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 01:03:48,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:03:49,048 INFO L225 Difference]: With dead ends: 54646 [2021-12-28 01:03:49,048 INFO L226 Difference]: Without dead ends: 28066 [2021-12-28 01:03:49,084 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 01:03:49,084 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 123 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 222 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 01:03:49,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 222 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:03:49,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28066 states. [2021-12-28 01:03:49,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28066 to 20182. [2021-12-28 01:03:49,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20182 states, 17220 states have (on average 1.2998257839721254) internal successors, (22383), 17395 states have internal predecessors, (22383), 1597 states have call successors, (1597), 1237 states have call predecessors, (1597), 1364 states have return successors, (2530), 1565 states have call predecessors, (2530), 1595 states have call successors, (2530) [2021-12-28 01:03:49,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20182 states to 20182 states and 26510 transitions. [2021-12-28 01:03:49,993 INFO L78 Accepts]: Start accepts. Automaton has 20182 states and 26510 transitions. Word has length 160 [2021-12-28 01:03:49,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:03:49,994 INFO L470 AbstractCegarLoop]: Abstraction has 20182 states and 26510 transitions. [2021-12-28 01:03:49,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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 01:03:49,994 INFO L276 IsEmpty]: Start isEmpty. Operand 20182 states and 26510 transitions. [2021-12-28 01:03:50,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-28 01:03:50,021 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:03:50,021 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] [2021-12-28 01:03:50,042 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 01:03:50,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:03:50,235 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:03:50,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:03:50,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1447536284, now seen corresponding path program 1 times [2021-12-28 01:03:50,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:03:50,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771011272] [2021-12-28 01:03:50,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:50,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:03:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:50,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:03:50,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:50,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:03:50,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:50,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:03:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:50,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 01:03:50,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:50,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 01:03:50,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:50,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-28 01:03:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:50,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:03:50,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:50,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-28 01:03:50,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:50,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-28 01:03:50,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:50,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:03:50,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:50,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-28 01:03:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:50,323 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 01:03:50,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:03:50,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771011272] [2021-12-28 01:03:50,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771011272] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:03:50,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768014024] [2021-12-28 01:03:50,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:50,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:03:50,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:03:50,325 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 01:03:50,358 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 01:03:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:50,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 01:03:50,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:03:50,589 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 01:03:50,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:03:50,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768014024] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:03:50,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:03:50,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 01:03:50,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012039502] [2021-12-28 01:03:50,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:03:50,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:03:50,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:03:50,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:03:50,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:03:50,592 INFO L87 Difference]: Start difference. First operand 20182 states and 26510 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, (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 01:03:51,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:03:51,947 INFO L93 Difference]: Finished difference Result 57486 states and 76378 transitions. [2021-12-28 01:03:51,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:03:51,949 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, (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 160 [2021-12-28 01:03:51,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:03:52,079 INFO L225 Difference]: With dead ends: 57486 [2021-12-28 01:03:52,080 INFO L226 Difference]: Without dead ends: 37321 [2021-12-28 01:03:52,130 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 01:03:52,130 INFO L933 BasicCegarLoop]: 355 mSDtfsCounter, 150 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 540 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 01:03:52,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 540 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:03:52,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37321 states. [2021-12-28 01:03:53,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37321 to 37317. [2021-12-28 01:03:53,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37317 states, 31725 states have (on average 1.2904018912529551) internal successors, (40938), 32074 states have internal predecessors, (40938), 3027 states have call successors, (3027), 2309 states have call predecessors, (3027), 2564 states have return successors, (5602), 2965 states have call predecessors, (5602), 3025 states have call successors, (5602) [2021-12-28 01:03:53,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37317 states to 37317 states and 49567 transitions. [2021-12-28 01:03:53,841 INFO L78 Accepts]: Start accepts. Automaton has 37317 states and 49567 transitions. Word has length 160 [2021-12-28 01:03:53,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:03:53,842 INFO L470 AbstractCegarLoop]: Abstraction has 37317 states and 49567 transitions. [2021-12-28 01:03:53,842 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, (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 01:03:53,842 INFO L276 IsEmpty]: Start isEmpty. Operand 37317 states and 49567 transitions. [2021-12-28 01:03:53,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-28 01:03:53,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:03:53,883 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] [2021-12-28 01:03:53,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-28 01:03:54,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-28 01:03:54,103 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:03:54,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:03:54,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1243097865, now seen corresponding path program 1 times [2021-12-28 01:03:54,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:03:54,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596117440] [2021-12-28 01:03:54,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:54,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:03:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:54,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:03:54,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:54,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:03:54,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:54,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:03:54,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:54,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 01:03:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:54,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 01:03:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:54,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 01:03:54,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:54,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-28 01:03:54,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:54,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:03:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:54,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-28 01:03:54,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:54,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:03:54,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:54,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-28 01:03:54,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:54,219 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 01:03:54,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:03:54,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596117440] [2021-12-28 01:03:54,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596117440] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:03:54,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358244998] [2021-12-28 01:03:54,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:54,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:03:54,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:03:54,232 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 01:03:54,233 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 01:03:54,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:54,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 01:03:54,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:03:54,482 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 01:03:54,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:03:54,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358244998] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:03:54,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:03:54,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 01:03:54,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537861356] [2021-12-28 01:03:54,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:03:54,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:03:54,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:03:54,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:03:54,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:03:54,483 INFO L87 Difference]: Start difference. First operand 37317 states and 49567 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (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 01:03:55,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:03:55,942 INFO L93 Difference]: Finished difference Result 66696 states and 88559 transitions. [2021-12-28 01:03:55,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:03:55,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (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 01:03:55,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:03:56,067 INFO L225 Difference]: With dead ends: 66696 [2021-12-28 01:03:56,067 INFO L226 Difference]: Without dead ends: 37895 [2021-12-28 01:03:56,125 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 01:03:56,126 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 149 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 402 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 01:03:56,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 402 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:03:56,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37895 states. [2021-12-28 01:03:57,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37895 to 37317. [2021-12-28 01:03:57,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37317 states, 31725 states have (on average 1.283845547675335) internal successors, (40730), 32074 states have internal predecessors, (40730), 3027 states have call successors, (3027), 2309 states have call predecessors, (3027), 2564 states have return successors, (5602), 2965 states have call predecessors, (5602), 3025 states have call successors, (5602) [2021-12-28 01:03:57,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37317 states to 37317 states and 49359 transitions. [2021-12-28 01:03:57,817 INFO L78 Accepts]: Start accepts. Automaton has 37317 states and 49359 transitions. Word has length 160 [2021-12-28 01:03:57,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:03:57,818 INFO L470 AbstractCegarLoop]: Abstraction has 37317 states and 49359 transitions. [2021-12-28 01:03:57,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (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 01:03:57,818 INFO L276 IsEmpty]: Start isEmpty. Operand 37317 states and 49359 transitions. [2021-12-28 01:03:57,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-28 01:03:57,853 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:03:57,853 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] [2021-12-28 01:03:57,877 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 01:03:58,067 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,SelfDestructingSolverStorable15 [2021-12-28 01:03:58,067 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:03:58,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:03:58,068 INFO L85 PathProgramCache]: Analyzing trace with hash -924686934, now seen corresponding path program 1 times [2021-12-28 01:03:58,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:03:58,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897967123] [2021-12-28 01:03:58,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:58,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:03:58,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:58,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:03:58,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:58,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:03:58,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:58,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:03:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:58,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 01:03:58,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:58,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 01:03:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:58,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 01:03:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:58,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-28 01:03:58,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:58,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:03:58,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:58,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-28 01:03:58,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:58,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:03:58,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:58,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-28 01:03:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:58,163 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 01:03:58,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:03:58,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897967123] [2021-12-28 01:03:58,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897967123] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:03:58,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409160176] [2021-12-28 01:03:58,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:03:58,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:03:58,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:03:58,165 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 01:03:58,199 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 01:03:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:03:58,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 01:03:58,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:03:58,431 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 01:03:58,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:03:58,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409160176] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:03:58,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:03:58,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 01:03:58,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974499598] [2021-12-28 01:03:58,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:03:58,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:03:58,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:03:58,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:03:58,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:03:58,433 INFO L87 Difference]: Start difference. First operand 37317 states and 49359 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (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 01:03:59,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:03:59,964 INFO L93 Difference]: Finished difference Result 66439 states and 87931 transitions. [2021-12-28 01:03:59,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:03:59,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (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 01:03:59,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:04:00,234 INFO L225 Difference]: With dead ends: 66439 [2021-12-28 01:04:00,234 INFO L226 Difference]: Without dead ends: 38303 [2021-12-28 01:04:00,274 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 01:04:00,276 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 148 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 415 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 01:04:00,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 415 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:04:00,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38303 states. [2021-12-28 01:04:01,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38303 to 37273. [2021-12-28 01:04:01,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37273 states, 31681 states have (on average 1.27767431583599) internal successors, (40478), 32030 states have internal predecessors, (40478), 3027 states have call successors, (3027), 2309 states have call predecessors, (3027), 2564 states have return successors, (5602), 2965 states have call predecessors, (5602), 3025 states have call successors, (5602) [2021-12-28 01:04:01,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37273 states to 37273 states and 49107 transitions. [2021-12-28 01:04:01,953 INFO L78 Accepts]: Start accepts. Automaton has 37273 states and 49107 transitions. Word has length 160 [2021-12-28 01:04:01,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:04:01,954 INFO L470 AbstractCegarLoop]: Abstraction has 37273 states and 49107 transitions. [2021-12-28 01:04:01,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (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 01:04:01,954 INFO L276 IsEmpty]: Start isEmpty. Operand 37273 states and 49107 transitions. [2021-12-28 01:04:01,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-28 01:04:01,986 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:04:01,986 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] [2021-12-28 01:04:02,005 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 01:04:02,186 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,SelfDestructingSolverStorable16 [2021-12-28 01:04:02,187 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:04:02,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:04:02,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1962226697, now seen corresponding path program 1 times [2021-12-28 01:04:02,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:04:02,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583940197] [2021-12-28 01:04:02,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:04:02,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:04:02,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:02,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:04:02,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:02,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:04:02,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:02,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:04:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:02,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 01:04:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:02,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 01:04:02,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:02,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 01:04:02,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:02,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-28 01:04:02,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:02,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:04:02,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:02,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-28 01:04:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:02,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:04:02,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:02,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-28 01:04:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:02,239 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 01:04:02,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:04:02,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583940197] [2021-12-28 01:04:02,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583940197] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:04:02,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:04:02,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:04:02,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087544356] [2021-12-28 01:04:02,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:04:02,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:04:02,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:04:02,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:04:02,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:04:02,241 INFO L87 Difference]: Start difference. First operand 37273 states and 49107 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (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 01:04:03,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:04:03,954 INFO L93 Difference]: Finished difference Result 73684 states and 96266 transitions. [2021-12-28 01:04:03,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:04:03,954 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (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 160 [2021-12-28 01:04:03,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:04:04,063 INFO L225 Difference]: With dead ends: 73684 [2021-12-28 01:04:04,063 INFO L226 Difference]: Without dead ends: 36426 [2021-12-28 01:04:04,128 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 01:04:04,128 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 295 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:04:04,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 333 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 01:04:04,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36426 states. [2021-12-28 01:04:05,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36426 to 33688. [2021-12-28 01:04:05,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33688 states, 28868 states have (on average 1.276880975474574) internal successors, (36861), 29506 states have internal predecessors, (36861), 2309 states have call successors, (2309), 1773 states have call predecessors, (2309), 2510 states have return successors, (4633), 2424 states have call predecessors, (4633), 2307 states have call successors, (4633) [2021-12-28 01:04:05,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33688 states to 33688 states and 43803 transitions. [2021-12-28 01:04:05,824 INFO L78 Accepts]: Start accepts. Automaton has 33688 states and 43803 transitions. Word has length 160 [2021-12-28 01:04:05,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:04:05,824 INFO L470 AbstractCegarLoop]: Abstraction has 33688 states and 43803 transitions. [2021-12-28 01:04:05,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (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 01:04:05,825 INFO L276 IsEmpty]: Start isEmpty. Operand 33688 states and 43803 transitions. [2021-12-28 01:04:05,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-28 01:04:05,853 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:04:05,853 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 01:04:05,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-28 01:04:05,854 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:04:05,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:04:05,854 INFO L85 PathProgramCache]: Analyzing trace with hash -32521304, now seen corresponding path program 1 times [2021-12-28 01:04:05,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:04:05,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267227609] [2021-12-28 01:04:05,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:04:05,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:04:05,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:05,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:04:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:05,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:04:05,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:05,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:04:05,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:05,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 01:04:05,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:05,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 01:04:05,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:05,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 01:04:05,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:05,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-28 01:04:05,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:05,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:04:05,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:05,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-28 01:04:05,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:05,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:04:05,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:05,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-28 01:04:05,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:05,904 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-28 01:04:05,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:04:05,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267227609] [2021-12-28 01:04:05,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267227609] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:04:05,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:04:05,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:04:05,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861916258] [2021-12-28 01:04:05,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:04:05,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:04:05,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:04:05,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:04:05,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:04:05,906 INFO L87 Difference]: Start difference. First operand 33688 states and 43803 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (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 01:04:07,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:04:07,203 INFO L93 Difference]: Finished difference Result 61428 states and 79737 transitions. [2021-12-28 01:04:07,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:04:07,204 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (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 160 [2021-12-28 01:04:07,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:04:07,280 INFO L225 Difference]: With dead ends: 61428 [2021-12-28 01:04:07,281 INFO L226 Difference]: Without dead ends: 27751 [2021-12-28 01:04:07,336 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 01:04:07,337 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 295 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:04:07,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 331 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:04:07,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27751 states. [2021-12-28 01:04:08,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27751 to 25142. [2021-12-28 01:04:08,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25142 states, 21588 states have (on average 1.2871965906985363) internal successors, (27788), 22035 states have internal predecessors, (27788), 1719 states have call successors, (1719), 1327 states have call predecessors, (1719), 1834 states have return successors, (3243), 1787 states have call predecessors, (3243), 1717 states have call successors, (3243) [2021-12-28 01:04:08,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25142 states to 25142 states and 32750 transitions. [2021-12-28 01:04:08,500 INFO L78 Accepts]: Start accepts. Automaton has 25142 states and 32750 transitions. Word has length 160 [2021-12-28 01:04:08,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:04:08,500 INFO L470 AbstractCegarLoop]: Abstraction has 25142 states and 32750 transitions. [2021-12-28 01:04:08,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (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 01:04:08,500 INFO L276 IsEmpty]: Start isEmpty. Operand 25142 states and 32750 transitions. [2021-12-28 01:04:08,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-28 01:04:08,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:04:08,521 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:04:08,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-28 01:04:08,521 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:04:08,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:04:08,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1152046593, now seen corresponding path program 1 times [2021-12-28 01:04:08,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:04:08,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738695135] [2021-12-28 01:04:08,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:04:08,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:04:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:08,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:04:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:08,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:04:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:08,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:04:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:08,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 01:04:08,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:08,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 01:04:08,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:08,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-28 01:04:08,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:08,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-28 01:04:08,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:08,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:04:08,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:08,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-28 01:04:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:08,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:04:08,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:08,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-28 01:04:08,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:08,605 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-28 01:04:08,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:04:08,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738695135] [2021-12-28 01:04:08,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738695135] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:04:08,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611682020] [2021-12-28 01:04:08,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:04:08,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:04:08,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:04:08,606 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 01:04:08,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-28 01:04:08,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:08,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 01:04:08,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:04:08,891 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-28 01:04:08,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:04:08,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611682020] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:04:08,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:04:08,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 01:04:08,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103584010] [2021-12-28 01:04:08,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:04:08,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:04:08,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:04:08,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:04:08,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:04:08,895 INFO L87 Difference]: Start difference. First operand 25142 states and 32750 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, (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 01:04:09,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:04:09,850 INFO L93 Difference]: Finished difference Result 42267 states and 56594 transitions. [2021-12-28 01:04:09,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:04:09,850 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, (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 162 [2021-12-28 01:04:09,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:04:09,927 INFO L225 Difference]: With dead ends: 42267 [2021-12-28 01:04:09,927 INFO L226 Difference]: Without dead ends: 25260 [2021-12-28 01:04:09,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:04:09,972 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 142 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:04:09,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 461 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:04:09,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25260 states. [2021-12-28 01:04:11,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25260 to 25142. [2021-12-28 01:04:11,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25142 states, 21588 states have (on average 1.2639429312581063) internal successors, (27286), 22035 states have internal predecessors, (27286), 1719 states have call successors, (1719), 1327 states have call predecessors, (1719), 1834 states have return successors, (3243), 1787 states have call predecessors, (3243), 1717 states have call successors, (3243) [2021-12-28 01:04:11,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25142 states to 25142 states and 32248 transitions. [2021-12-28 01:04:11,287 INFO L78 Accepts]: Start accepts. Automaton has 25142 states and 32248 transitions. Word has length 162 [2021-12-28 01:04:11,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:04:11,287 INFO L470 AbstractCegarLoop]: Abstraction has 25142 states and 32248 transitions. [2021-12-28 01:04:11,288 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, (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 01:04:11,288 INFO L276 IsEmpty]: Start isEmpty. Operand 25142 states and 32248 transitions. [2021-12-28 01:04:11,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-28 01:04:11,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:04:11,307 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:04:11,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-28 01:04:11,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:04:11,507 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:04:11,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:04:11,508 INFO L85 PathProgramCache]: Analyzing trace with hash 179847711, now seen corresponding path program 1 times [2021-12-28 01:04:11,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:04:11,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293867533] [2021-12-28 01:04:11,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:04:11,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:04:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:11,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 01:04:11,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:11,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:04:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:11,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 01:04:11,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:11,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 01:04:11,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:11,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 01:04:11,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:11,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-28 01:04:11,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:11,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-28 01:04:11,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:11,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:04:11,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:11,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-28 01:04:11,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:11,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:04:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:11,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-28 01:04:11,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:11,603 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-28 01:04:11,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:04:11,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293867533] [2021-12-28 01:04:11,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293867533] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:04:11,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128164416] [2021-12-28 01:04:11,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:04:11,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:04:11,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:04:11,605 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 01:04:11,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-28 01:04:11,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:04:11,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 01:04:11,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:04:11,892 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-28 01:04:11,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:04:11,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128164416] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:04:11,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:04:11,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 01:04:11,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374784352] [2021-12-28 01:04:11,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:04:11,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:04:11,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:04:11,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:04:11,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:04:11,893 INFO L87 Difference]: Start difference. First operand 25142 states and 32248 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10)