./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/heavy-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/loops/heavy-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 544ff1a31d34f1c818140bb31fb5c7091aef904c3b9f7e17a0cc8560e99eb61a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 12:14:48,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 12:14:48,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 12:14:48,970 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 12:14:48,971 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 12:14:48,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 12:14:48,980 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 12:14:48,982 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 12:14:48,988 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 12:14:48,989 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 12:14:48,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 12:14:48,991 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 12:14:48,992 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 12:14:48,994 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 12:14:48,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 12:14:48,997 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 12:14:48,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 12:14:49,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 12:14:49,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 12:14:49,010 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 12:14:49,011 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 12:14:49,014 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 12:14:49,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 12:14:49,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 12:14:49,019 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 12:14:49,020 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 12:14:49,020 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 12:14:49,021 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 12:14:49,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 12:14:49,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 12:14:49,023 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 12:14:49,024 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 12:14:49,025 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 12:14:49,025 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 12:14:49,026 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 12:14:49,026 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 12:14:49,027 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 12:14:49,027 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 12:14:49,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 12:14:49,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 12:14:49,029 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 12:14:49,030 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 12:14:49,074 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 12:14:49,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 12:14:49,075 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 12:14:49,076 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 12:14:49,076 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 12:14:49,077 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 12:14:49,077 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 12:14:49,077 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 12:14:49,077 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 12:14:49,078 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 12:14:49,078 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 12:14:49,078 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 12:14:49,078 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 12:14:49,079 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 12:14:49,079 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 12:14:49,079 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 12:14:49,079 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 12:14:49,079 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 12:14:49,079 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 12:14:49,080 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 12:14:49,080 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 12:14:49,080 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 12:14:49,080 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 12:14:49,080 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 12:14:49,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:14:49,081 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 12:14:49,081 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 12:14:49,081 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 12:14:49,081 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 12:14:49,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 12:14:49,081 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 12:14:49,082 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 12:14:49,082 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 12:14:49,082 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 12:14:49,082 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 544ff1a31d34f1c818140bb31fb5c7091aef904c3b9f7e17a0cc8560e99eb61a [2021-12-21 12:14:49,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 12:14:49,299 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 12:14:49,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 12:14:49,302 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 12:14:49,303 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 12:14:49,303 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/heavy-1.c [2021-12-21 12:14:49,355 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b52eaf8fa/a5ec23b4852d499aa3ec58c5fceaeabd/FLAG512442234 [2021-12-21 12:14:49,678 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 12:14:49,678 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/heavy-1.c [2021-12-21 12:14:49,682 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b52eaf8fa/a5ec23b4852d499aa3ec58c5fceaeabd/FLAG512442234 [2021-12-21 12:14:49,696 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b52eaf8fa/a5ec23b4852d499aa3ec58c5fceaeabd [2021-12-21 12:14:49,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 12:14:49,698 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 12:14:49,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 12:14:49,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 12:14:49,703 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 12:14:49,704 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:14:49" (1/1) ... [2021-12-21 12:14:49,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@625adac7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:14:49, skipping insertion in model container [2021-12-21 12:14:49,705 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:14:49" (1/1) ... [2021-12-21 12:14:49,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 12:14:49,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 12:14:49,834 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/loops/heavy-1.c[600,613] [2021-12-21 12:14:49,837 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:14:49,868 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 12:14:49,878 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/loops/heavy-1.c[600,613] [2021-12-21 12:14:49,878 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:14:49,917 INFO L208 MainTranslator]: Completed translation [2021-12-21 12:14:49,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:14:49 WrapperNode [2021-12-21 12:14:49,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 12:14:49,919 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 12:14:49,919 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 12:14:49,919 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 12:14:49,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:14:49" (1/1) ... [2021-12-21 12:14:49,929 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:14:49" (1/1) ... [2021-12-21 12:14:49,940 INFO L137 Inliner]: procedures = 12, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2021-12-21 12:14:49,941 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 12:14:49,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 12:14:49,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 12:14:49,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 12:14:49,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:14:49" (1/1) ... [2021-12-21 12:14:49,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:14:49" (1/1) ... [2021-12-21 12:14:49,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:14:49" (1/1) ... [2021-12-21 12:14:49,948 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:14:49" (1/1) ... [2021-12-21 12:14:49,951 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:14:49" (1/1) ... [2021-12-21 12:14:49,954 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:14:49" (1/1) ... [2021-12-21 12:14:49,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:14:49" (1/1) ... [2021-12-21 12:14:49,955 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 12:14:49,956 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 12:14:49,956 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 12:14:49,956 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 12:14:49,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:14:49" (1/1) ... [2021-12-21 12:14:49,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:14:49,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:14:49,984 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) [2021-12-21 12:14:49,989 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 [2021-12-21 12:14:50,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 12:14:50,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 12:14:50,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 12:14:50,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 12:14:50,013 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 12:14:50,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 12:14:50,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-21 12:14:50,059 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 12:14:50,060 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 12:14:50,159 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 12:14:50,162 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 12:14:50,163 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-21 12:14:50,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:14:50 BoogieIcfgContainer [2021-12-21 12:14:50,164 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 12:14:50,165 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 12:14:50,165 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 12:14:50,168 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 12:14:50,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 12:14:49" (1/3) ... [2021-12-21 12:14:50,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c77d5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:14:50, skipping insertion in model container [2021-12-21 12:14:50,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:14:49" (2/3) ... [2021-12-21 12:14:50,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c77d5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:14:50, skipping insertion in model container [2021-12-21 12:14:50,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:14:50" (3/3) ... [2021-12-21 12:14:50,170 INFO L111 eAbstractionObserver]: Analyzing ICFG heavy-1.c [2021-12-21 12:14:50,173 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 12:14:50,174 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 12:14:50,201 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 12:14:50,206 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 [2021-12-21 12:14:50,206 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 12:14:50,214 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:50,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-21 12:14:50,217 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:14:50,217 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-21 12:14:50,218 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:14:50,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:14:50,221 INFO L85 PathProgramCache]: Analyzing trace with hash 28726599, now seen corresponding path program 1 times [2021-12-21 12:14:50,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:14:50,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377725157] [2021-12-21 12:14:50,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:14:50,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:14:50,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:14:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:14:50,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:14:50,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377725157] [2021-12-21 12:14:50,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377725157] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:14:50,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:14:50,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 12:14:50,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363857694] [2021-12-21 12:14:50,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:14:50,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 12:14:50,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:14:50,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 12:14:50,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:14:50,384 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:50,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:14:50,396 INFO L93 Difference]: Finished difference Result 26 states and 38 transitions. [2021-12-21 12:14:50,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 12:14:50,398 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-12-21 12:14:50,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:14:50,403 INFO L225 Difference]: With dead ends: 26 [2021-12-21 12:14:50,403 INFO L226 Difference]: Without dead ends: 11 [2021-12-21 12:14:50,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:14:50,412 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:14:50,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:14:50,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-12-21 12:14:50,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-12-21 12:14:50,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:50,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-12-21 12:14:50,447 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 5 [2021-12-21 12:14:50,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:14:50,448 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-12-21 12:14:50,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:50,448 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-12-21 12:14:50,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-21 12:14:50,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:14:50,449 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-21 12:14:50,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 12:14:50,450 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:14:50,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:14:50,453 INFO L85 PathProgramCache]: Analyzing trace with hash 28697769, now seen corresponding path program 1 times [2021-12-21 12:14:50,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:14:50,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383300117] [2021-12-21 12:14:50,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:14:50,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:14:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:14:50,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:14:50,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:14:50,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383300117] [2021-12-21 12:14:50,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383300117] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:14:50,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:14:50,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 12:14:50,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68887318] [2021-12-21 12:14:50,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:14:50,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 12:14:50,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:14:50,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 12:14:50,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 12:14:50,529 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:50,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:14:50,545 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-12-21 12:14:50,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 12:14:50,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-12-21 12:14:50,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:14:50,546 INFO L225 Difference]: With dead ends: 20 [2021-12-21 12:14:50,546 INFO L226 Difference]: Without dead ends: 17 [2021-12-21 12:14:50,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 12:14:50,547 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:14:50,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 18 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:14:50,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-12-21 12:14:50,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 12. [2021-12-21 12:14:50,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:50,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-12-21 12:14:50,552 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 5 [2021-12-21 12:14:50,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:14:50,552 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-12-21 12:14:50,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:50,553 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-12-21 12:14:50,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 12:14:50,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:14:50,554 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:14:50,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 12:14:50,555 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:14:50,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:14:50,555 INFO L85 PathProgramCache]: Analyzing trace with hash 269702257, now seen corresponding path program 1 times [2021-12-21 12:14:50,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:14:50,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318317081] [2021-12-21 12:14:50,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:14:50,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:14:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:14:50,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:14:50,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:14:50,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318317081] [2021-12-21 12:14:50,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318317081] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:14:50,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:14:50,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 12:14:50,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052329002] [2021-12-21 12:14:50,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:14:50,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 12:14:50,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:14:50,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 12:14:50,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 12:14:50,599 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:50,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:14:50,621 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2021-12-21 12:14:50,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 12:14:50,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-21 12:14:50,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:14:50,622 INFO L225 Difference]: With dead ends: 25 [2021-12-21 12:14:50,622 INFO L226 Difference]: Without dead ends: 16 [2021-12-21 12:14:50,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 12:14:50,623 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:14:50,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 17 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:14:50,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-21 12:14:50,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2021-12-21 12:14:50,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:50,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-12-21 12:14:50,626 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2021-12-21 12:14:50,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:14:50,626 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-12-21 12:14:50,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:50,626 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-12-21 12:14:50,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 12:14:50,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:14:50,626 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:14:50,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 12:14:50,627 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:14:50,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:14:50,627 INFO L85 PathProgramCache]: Analyzing trace with hash 904437765, now seen corresponding path program 1 times [2021-12-21 12:14:50,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:14:50,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089344349] [2021-12-21 12:14:50,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:14:50,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:14:50,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:14:50,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:14:50,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:14:50,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089344349] [2021-12-21 12:14:50,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089344349] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:14:50,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:14:50,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 12:14:50,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44333225] [2021-12-21 12:14:50,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:14:50,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 12:14:50,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:14:50,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 12:14:50,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 12:14:50,678 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:50,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:14:50,690 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2021-12-21 12:14:50,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 12:14:50,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-21 12:14:50,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:14:50,692 INFO L225 Difference]: With dead ends: 25 [2021-12-21 12:14:50,692 INFO L226 Difference]: Without dead ends: 15 [2021-12-21 12:14:50,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 12:14:50,697 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:14:50,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 19 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:14:50,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-21 12:14:50,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-12-21 12:14:50,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:50,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-12-21 12:14:50,699 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2021-12-21 12:14:50,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:14:50,700 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-12-21 12:14:50,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:50,700 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-12-21 12:14:50,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 12:14:50,701 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:14:50,701 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:14:50,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 12:14:50,701 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:14:50,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:14:50,702 INFO L85 PathProgramCache]: Analyzing trace with hash -2012164797, now seen corresponding path program 1 times [2021-12-21 12:14:50,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:14:50,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516036875] [2021-12-21 12:14:50,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:14:50,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:14:50,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:14:50,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:14:50,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:14:50,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516036875] [2021-12-21 12:14:50,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516036875] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:14:50,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444166173] [2021-12-21 12:14:50,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:14:50,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:14:50,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:14:50,797 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) [2021-12-21 12:14:50,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 12:14:50,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:14:50,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 12:14:50,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:14:50,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 12:14:50,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:14:50,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 12:14:50,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444166173] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:14:50,942 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:14:50,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-21 12:14:50,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32747044] [2021-12-21 12:14:50,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:14:50,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 12:14:50,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:14:50,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 12:14:50,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-21 12:14:50,946 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:51,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:14:51,133 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2021-12-21 12:14:51,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 12:14:51,136 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-21 12:14:51,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:14:51,137 INFO L225 Difference]: With dead ends: 52 [2021-12-21 12:14:51,137 INFO L226 Difference]: Without dead ends: 41 [2021-12-21 12:14:51,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-12-21 12:14:51,139 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:14:51,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 30 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:14:51,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-21 12:14:51,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2021-12-21 12:14:51,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:51,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-12-21 12:14:51,150 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 13 [2021-12-21 12:14:51,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:14:51,151 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-12-21 12:14:51,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:51,151 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-12-21 12:14:51,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-21 12:14:51,152 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:14:51,152 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:14:51,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 12:14:51,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:14:51,371 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:14:51,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:14:51,371 INFO L85 PathProgramCache]: Analyzing trace with hash 76140657, now seen corresponding path program 2 times [2021-12-21 12:14:51,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:14:51,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009034777] [2021-12-21 12:14:51,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:14:51,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:14:51,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:14:51,477 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 44 proven. 4 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-21 12:14:51,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:14:51,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009034777] [2021-12-21 12:14:51,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009034777] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:14:51,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138954903] [2021-12-21 12:14:51,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 12:14:51,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:14:51,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:14:51,481 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) [2021-12-21 12:14:51,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 12:14:51,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 12:14:51,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:14:51,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 12:14:51,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:14:51,640 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 44 proven. 4 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-21 12:14:51,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:14:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 65 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-21 12:14:51,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138954903] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:14:51,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:14:51,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 8] total 15 [2021-12-21 12:14:51,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685618345] [2021-12-21 12:14:51,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:14:51,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 12:14:51,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:14:51,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 12:14:51,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-12-21 12:14:51,831 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:52,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:14:52,208 INFO L93 Difference]: Finished difference Result 134 states and 166 transitions. [2021-12-21 12:14:52,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-21 12:14:52,208 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-21 12:14:52,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:14:52,209 INFO L225 Difference]: With dead ends: 134 [2021-12-21 12:14:52,209 INFO L226 Difference]: Without dead ends: 88 [2021-12-21 12:14:52,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2021-12-21 12:14:52,210 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 55 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 12:14:52,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 40 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 12:14:52,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-21 12:14:52,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2021-12-21 12:14:52,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1728395061728396) internal successors, (95), 81 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:52,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2021-12-21 12:14:52,221 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 36 [2021-12-21 12:14:52,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:14:52,221 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2021-12-21 12:14:52,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:52,221 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2021-12-21 12:14:52,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-21 12:14:52,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:14:52,222 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:14:52,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 12:14:52,427 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,SelfDestructingSolverStorable5 [2021-12-21 12:14:52,428 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:14:52,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:14:52,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1898529999, now seen corresponding path program 3 times [2021-12-21 12:14:52,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:14:52,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5200749] [2021-12-21 12:14:52,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:14:52,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:14:52,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:14:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 182 proven. 36 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-12-21 12:14:52,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:14:52,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5200749] [2021-12-21 12:14:52,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5200749] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:14:52,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104063302] [2021-12-21 12:14:52,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 12:14:52,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:14:52,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:14:52,616 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) [2021-12-21 12:14:52,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 12:14:52,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-21 12:14:52,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:14:52,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 12:14:52,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:14:52,769 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-12-21 12:14:52,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:14:52,890 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-12-21 12:14:52,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104063302] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:14:52,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:14:52,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 13 [2021-12-21 12:14:52,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685448338] [2021-12-21 12:14:52,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:14:52,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 12:14:52,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:14:52,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 12:14:52,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-21 12:14:52,893 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:53,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:14:53,396 INFO L93 Difference]: Finished difference Result 385 states and 461 transitions. [2021-12-21 12:14:53,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-21 12:14:53,396 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-21 12:14:53,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:14:53,399 INFO L225 Difference]: With dead ends: 385 [2021-12-21 12:14:53,401 INFO L226 Difference]: Without dead ends: 306 [2021-12-21 12:14:53,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=1402, Unknown=0, NotChecked=0, Total=1722 [2021-12-21 12:14:53,403 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 98 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 12:14:53,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 63 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 12:14:53,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-12-21 12:14:53,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 290. [2021-12-21 12:14:53,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.0726643598615917) internal successors, (310), 289 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:53,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 310 transitions. [2021-12-21 12:14:53,446 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 310 transitions. Word has length 56 [2021-12-21 12:14:53,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:14:53,447 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 310 transitions. [2021-12-21 12:14:53,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:53,447 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 310 transitions. [2021-12-21 12:14:53,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-12-21 12:14:53,458 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:14:53,460 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 16, 16, 16, 4, 4, 4, 1, 1, 1, 1, 1] [2021-12-21 12:14:53,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 12:14:53,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:14:53,666 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:14:53,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:14:53,667 INFO L85 PathProgramCache]: Analyzing trace with hash 153690793, now seen corresponding path program 4 times [2021-12-21 12:14:53,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:14:53,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997304627] [2021-12-21 12:14:53,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:14:53,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:14:53,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:14:54,129 INFO L134 CoverageAnalysis]: Checked inductivity of 14670 backedges. 1718 proven. 49 refuted. 0 times theorem prover too weak. 12903 trivial. 0 not checked. [2021-12-21 12:14:54,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:14:54,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997304627] [2021-12-21 12:14:54,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997304627] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:14:54,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937941181] [2021-12-21 12:14:54,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 12:14:54,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:14:54,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:14:54,131 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) [2021-12-21 12:14:54,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 12:14:54,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 12:14:54,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:14:54,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 12:14:54,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:14:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 14670 backedges. 5551 proven. 737 refuted. 0 times theorem prover too weak. 8382 trivial. 0 not checked. [2021-12-21 12:14:54,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:14:55,457 INFO L134 CoverageAnalysis]: Checked inductivity of 14670 backedges. 5578 proven. 710 refuted. 0 times theorem prover too weak. 8382 trivial. 0 not checked. [2021-12-21 12:14:55,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937941181] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:14:55,457 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:14:55,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 30 [2021-12-21 12:14:55,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894053409] [2021-12-21 12:14:55,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:14:55,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-21 12:14:55,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:14:55,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-21 12:14:55,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2021-12-21 12:14:55,460 INFO L87 Difference]: Start difference. First operand 290 states and 310 transitions. Second operand has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 30 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:15:00,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:15:00,868 INFO L93 Difference]: Finished difference Result 1089 states and 1216 transitions. [2021-12-21 12:15:00,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-12-21 12:15:00,868 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 30 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 289 [2021-12-21 12:15:00,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:15:00,870 INFO L225 Difference]: With dead ends: 1089 [2021-12-21 12:15:00,870 INFO L226 Difference]: Without dead ends: 818 [2021-12-21 12:15:00,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 669 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4341 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2157, Invalid=10499, Unknown=0, NotChecked=0, Total=12656 [2021-12-21 12:15:00,875 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 318 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:15:00,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 116 Invalid, 1503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 12:15:00,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-12-21 12:15:00,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 778. [2021-12-21 12:15:00,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 1.057915057915058) internal successors, (822), 777 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:15:00,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 822 transitions. [2021-12-21 12:15:00,934 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 822 transitions. Word has length 289 [2021-12-21 12:15:00,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:15:00,935 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 822 transitions. [2021-12-21 12:15:00,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 30 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:15:00,935 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 822 transitions. [2021-12-21 12:15:00,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 778 [2021-12-21 12:15:00,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:15:00,945 INFO L514 BasicCegarLoop]: trace histogram [320, 320, 40, 40, 40, 4, 4, 4, 1, 1, 1, 1, 1] [2021-12-21 12:15:00,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 12:15:01,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:15:01,159 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:15:01,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:15:01,160 INFO L85 PathProgramCache]: Analyzing trace with hash -509282647, now seen corresponding path program 5 times [2021-12-21 12:15:01,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:15:01,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345025736] [2021-12-21 12:15:01,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:15:01,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:15:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:15:02,368 INFO L134 CoverageAnalysis]: Checked inductivity of 117402 backedges. 5702 proven. 64 refuted. 0 times theorem prover too weak. 111636 trivial. 0 not checked. [2021-12-21 12:15:02,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:15:02,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345025736] [2021-12-21 12:15:02,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345025736] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:15:02,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032910537] [2021-12-21 12:15:02,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 12:15:02,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:15:02,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:15:02,370 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) [2021-12-21 12:15:02,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 12:15:03,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-21 12:15:03,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:15:03,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-21 12:15:03,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:15:04,536 INFO L134 CoverageAnalysis]: Checked inductivity of 117402 backedges. 55460 proven. 64 refuted. 0 times theorem prover too weak. 61878 trivial. 0 not checked. [2021-12-21 12:15:04,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:15:05,563 INFO L134 CoverageAnalysis]: Checked inductivity of 117402 backedges. 55460 proven. 64 refuted. 0 times theorem prover too weak. 61878 trivial. 0 not checked. [2021-12-21 12:15:05,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032910537] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:15:05,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:15:05,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2021-12-21 12:15:05,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529628504] [2021-12-21 12:15:05,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:15:05,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-21 12:15:05,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:15:05,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-21 12:15:05,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2021-12-21 12:15:05,566 INFO L87 Difference]: Start difference. First operand 778 states and 822 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:15:07,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:15:07,337 INFO L93 Difference]: Finished difference Result 2335 states and 2822 transitions. [2021-12-21 12:15:07,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 12:15:07,338 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 777 [2021-12-21 12:15:07,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:15:07,342 INFO L225 Difference]: With dead ends: 2335 [2021-12-21 12:15:07,342 INFO L226 Difference]: Without dead ends: 1578 [2021-12-21 12:15:07,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1571 GetRequests, 1543 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=306, Invalid=506, Unknown=0, NotChecked=0, Total=812 [2021-12-21 12:15:07,363 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 12:15:07,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 83 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 12:15:07,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-12-21 12:15:07,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1578. [2021-12-21 12:15:07,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1577 states have (on average 1.0285351934051998) internal successors, (1622), 1577 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:15:07,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 1622 transitions. [2021-12-21 12:15:07,427 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 1622 transitions. Word has length 777 [2021-12-21 12:15:07,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:15:07,428 INFO L470 AbstractCegarLoop]: Abstraction has 1578 states and 1622 transitions. [2021-12-21 12:15:07,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:15:07,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 1622 transitions. [2021-12-21 12:15:07,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1578 [2021-12-21 12:15:07,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:15:07,479 INFO L514 BasicCegarLoop]: trace histogram [720, 720, 40, 40, 40, 4, 4, 4, 1, 1, 1, 1, 1] [2021-12-21 12:15:07,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-21 12:15:07,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:15:07,685 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:15:07,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:15:07,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1381259607, now seen corresponding path program 6 times [2021-12-21 12:15:07,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:15:07,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809546706] [2021-12-21 12:15:07,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:15:07,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:15:11,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:15:12,017 INFO L134 CoverageAnalysis]: Checked inductivity of 549002 backedges. 26762 proven. 324 refuted. 0 times theorem prover too weak. 521916 trivial. 0 not checked. [2021-12-21 12:15:12,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:15:12,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809546706] [2021-12-21 12:15:12,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809546706] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:15:12,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061301229] [2021-12-21 12:15:12,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 12:15:12,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:15:12,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:15:12,018 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) [2021-12-21 12:15:12,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process