./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/nla-digbench-scaling/hard2_unwindbound5.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 5f094e7ea34d2025ab25ab51a4a0b06d8f845826c76dbd06e91f3d4a761fa19b --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 16:10:56,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 16:10:56,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 16:10:56,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 16:10:56,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 16:10:56,831 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 16:10:56,832 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 16:10:56,836 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 16:10:56,838 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 16:10:56,842 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 16:10:56,843 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 16:10:56,845 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 16:10:56,845 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 16:10:56,847 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 16:10:56,848 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 16:10:56,851 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 16:10:56,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 16:10:56,854 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 16:10:56,856 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 16:10:56,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 16:10:56,862 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 16:10:56,863 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 16:10:56,863 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 16:10:56,864 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 16:10:56,865 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 16:10:56,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 16:10:56,871 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 16:10:56,872 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 16:10:56,873 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 16:10:56,874 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 16:10:56,874 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 16:10:56,875 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 16:10:56,876 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 16:10:56,877 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 16:10:56,877 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 16:10:56,878 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 16:10:56,878 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 16:10:56,879 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 16:10:56,879 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 16:10:56,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 16:10:56,880 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 16:10:56,882 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 16:10:56,883 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 16:10:56,915 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 16:10:56,916 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 16:10:56,916 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 16:10:56,916 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 16:10:56,917 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 16:10:56,917 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 16:10:56,917 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 16:10:56,918 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 16:10:56,918 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 16:10:56,919 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 16:10:56,919 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 16:10:56,919 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 16:10:56,919 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 16:10:56,919 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 16:10:56,919 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 16:10:56,920 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 16:10:56,920 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 16:10:56,920 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 16:10:56,920 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 16:10:56,920 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 16:10:56,920 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 16:10:56,921 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 16:10:56,921 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 16:10:56,921 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 16:10:56,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 16:10:56,921 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 16:10:56,921 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 16:10:56,922 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 16:10:56,922 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 16:10:56,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 16:10:56,922 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 16:10:56,922 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 16:10:56,923 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 16:10:56,923 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5f094e7ea34d2025ab25ab51a4a0b06d8f845826c76dbd06e91f3d4a761fa19b [2022-07-19 16:10:57,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 16:10:57,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 16:10:57,147 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 16:10:57,148 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 16:10:57,149 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 16:10:57,150 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound5.c [2022-07-19 16:10:57,211 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcc95e997/06895263d0b94b838ab7ae0469828eb9/FLAG930407fa4 [2022-07-19 16:10:57,511 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 16:10:57,511 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound5.c [2022-07-19 16:10:57,516 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcc95e997/06895263d0b94b838ab7ae0469828eb9/FLAG930407fa4 [2022-07-19 16:10:57,952 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcc95e997/06895263d0b94b838ab7ae0469828eb9 [2022-07-19 16:10:57,954 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 16:10:57,956 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 16:10:57,962 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 16:10:57,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 16:10:57,966 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 16:10:57,967 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 04:10:57" (1/1) ... [2022-07-19 16:10:57,968 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3476e3ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:10:57, skipping insertion in model container [2022-07-19 16:10:57,968 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 04:10:57" (1/1) ... [2022-07-19 16:10:57,973 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 16:10:57,984 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 16:10:58,123 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/nla-digbench-scaling/hard2_unwindbound5.c[526,539] [2022-07-19 16:10:58,143 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 16:10:58,150 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 16:10:58,162 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/nla-digbench-scaling/hard2_unwindbound5.c[526,539] [2022-07-19 16:10:58,175 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 16:10:58,188 INFO L208 MainTranslator]: Completed translation [2022-07-19 16:10:58,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:10:58 WrapperNode [2022-07-19 16:10:58,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 16:10:58,190 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 16:10:58,190 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 16:10:58,190 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 16:10:58,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:10:58" (1/1) ... [2022-07-19 16:10:58,201 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:10:58" (1/1) ... [2022-07-19 16:10:58,218 INFO L137 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 61 [2022-07-19 16:10:58,219 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 16:10:58,219 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 16:10:58,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 16:10:58,220 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 16:10:58,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:10:58" (1/1) ... [2022-07-19 16:10:58,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:10:58" (1/1) ... [2022-07-19 16:10:58,237 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:10:58" (1/1) ... [2022-07-19 16:10:58,237 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:10:58" (1/1) ... [2022-07-19 16:10:58,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:10:58" (1/1) ... [2022-07-19 16:10:58,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:10:58" (1/1) ... [2022-07-19 16:10:58,252 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:10:58" (1/1) ... [2022-07-19 16:10:58,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 16:10:58,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 16:10:58,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 16:10:58,260 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 16:10:58,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:10:58" (1/1) ... [2022-07-19 16:10:58,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 16:10:58,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:10:58,290 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) [2022-07-19 16:10:58,310 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 [2022-07-19 16:10:58,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 16:10:58,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 16:10:58,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 16:10:58,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 16:10:58,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-19 16:10:58,337 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-19 16:10:58,375 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 16:10:58,376 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 16:10:58,488 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 16:10:58,492 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 16:10:58,492 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 16:10:58,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 04:10:58 BoogieIcfgContainer [2022-07-19 16:10:58,494 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 16:10:58,495 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 16:10:58,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 16:10:58,509 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 16:10:58,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 04:10:57" (1/3) ... [2022-07-19 16:10:58,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e39cf3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 04:10:58, skipping insertion in model container [2022-07-19 16:10:58,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:10:58" (2/3) ... [2022-07-19 16:10:58,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e39cf3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 04:10:58, skipping insertion in model container [2022-07-19 16:10:58,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 04:10:58" (3/3) ... [2022-07-19 16:10:58,511 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound5.c [2022-07-19 16:10:58,520 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 16:10:58,535 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 16:10:58,604 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 16:10:58,611 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@59e88ce8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@10beb749 [2022-07-19 16:10:58,612 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 16:10:58,615 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-19 16:10:58,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-19 16:10:58,649 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:10:58,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:10:58,650 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:10:58,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:10:58,654 INFO L85 PathProgramCache]: Analyzing trace with hash 643118537, now seen corresponding path program 1 times [2022-07-19 16:10:58,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:10:58,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248877883] [2022-07-19 16:10:58,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:10:58,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:10:58,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:10:58,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 16:10:58,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:10:58,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248877883] [2022-07-19 16:10:58,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248877883] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 16:10:58,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 16:10:58,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 16:10:58,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924511874] [2022-07-19 16:10:58,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 16:10:58,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 16:10:58,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:10:58,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 16:10:58,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 16:10:58,806 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 16:10:58,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:10:58,836 INFO L93 Difference]: Finished difference Result 50 states and 83 transitions. [2022-07-19 16:10:58,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 16:10:58,839 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-19 16:10:58,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:10:58,852 INFO L225 Difference]: With dead ends: 50 [2022-07-19 16:10:58,852 INFO L226 Difference]: Without dead ends: 22 [2022-07-19 16:10:58,855 INFO L412 NwaCegarLoop]: 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 [2022-07-19 16:10:58,859 INFO L413 NwaCegarLoop]: 36 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, 36 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 [2022-07-19 16:10:58,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 16:10:58,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-19 16:10:58,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-07-19 16:10:58,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 16:10:58,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2022-07-19 16:10:58,900 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 8 [2022-07-19 16:10:58,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:10:58,900 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2022-07-19 16:10:58,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 16:10:58,900 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2022-07-19 16:10:58,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-19 16:10:58,901 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:10:58,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:10:58,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 16:10:58,902 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:10:58,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:10:58,903 INFO L85 PathProgramCache]: Analyzing trace with hash 181060127, now seen corresponding path program 1 times [2022-07-19 16:10:58,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:10:58,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683963511] [2022-07-19 16:10:58,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:10:58,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:10:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:10:58,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 16:10:58,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:10:58,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683963511] [2022-07-19 16:10:58,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683963511] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 16:10:58,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 16:10:58,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 16:10:58,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450353760] [2022-07-19 16:10:58,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 16:10:58,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 16:10:58,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:10:58,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 16:10:58,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 16:10:58,976 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 16:10:59,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:10:59,026 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2022-07-19 16:10:59,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 16:10:59,028 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-19 16:10:59,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:10:59,028 INFO L225 Difference]: With dead ends: 36 [2022-07-19 16:10:59,029 INFO L226 Difference]: Without dead ends: 34 [2022-07-19 16:10:59,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 16:10:59,031 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 16:10:59,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 99 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 16:10:59,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-19 16:10:59,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2022-07-19 16:10:59,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 16:10:59,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2022-07-19 16:10:59,041 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 8 [2022-07-19 16:10:59,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:10:59,042 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2022-07-19 16:10:59,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 16:10:59,042 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2022-07-19 16:10:59,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-19 16:10:59,045 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:10:59,045 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:10:59,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 16:10:59,046 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:10:59,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:10:59,047 INFO L85 PathProgramCache]: Analyzing trace with hash -712280900, now seen corresponding path program 1 times [2022-07-19 16:10:59,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:10:59,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896726902] [2022-07-19 16:10:59,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:10:59,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:10:59,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:10:59,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 16:10:59,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:10:59,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896726902] [2022-07-19 16:10:59,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896726902] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 16:10:59,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 16:10:59,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 16:10:59,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253997385] [2022-07-19 16:10:59,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 16:10:59,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 16:10:59,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:10:59,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 16:10:59,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 16:10:59,086 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 16:10:59,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:10:59,103 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2022-07-19 16:10:59,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 16:10:59,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-19 16:10:59,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:10:59,105 INFO L225 Difference]: With dead ends: 42 [2022-07-19 16:10:59,105 INFO L226 Difference]: Without dead ends: 28 [2022-07-19 16:10:59,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 16:10:59,107 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 16:10:59,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 16:10:59,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-19 16:10:59,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-07-19 16:10:59,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 16:10:59,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2022-07-19 16:10:59,114 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2022-07-19 16:10:59,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:10:59,114 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2022-07-19 16:10:59,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 16:10:59,115 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2022-07-19 16:10:59,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-19 16:10:59,115 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:10:59,116 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:10:59,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 16:10:59,116 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:10:59,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:10:59,116 INFO L85 PathProgramCache]: Analyzing trace with hash 2036073049, now seen corresponding path program 1 times [2022-07-19 16:10:59,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:10:59,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551004768] [2022-07-19 16:10:59,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:10:59,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:10:59,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:10:59,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 16:10:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:10:59,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 16:10:59,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:10:59,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551004768] [2022-07-19 16:10:59,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551004768] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 16:10:59,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 16:10:59,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 16:10:59,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546783757] [2022-07-19 16:10:59,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 16:10:59,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 16:10:59,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:10:59,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 16:10:59,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 16:10:59,168 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 16:10:59,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:10:59,199 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2022-07-19 16:10:59,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 16:10:59,199 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-07-19 16:10:59,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:10:59,200 INFO L225 Difference]: With dead ends: 42 [2022-07-19 16:10:59,200 INFO L226 Difference]: Without dead ends: 40 [2022-07-19 16:10:59,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 16:10:59,201 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 16:10:59,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 95 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 16:10:59,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-19 16:10:59,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2022-07-19 16:10:59,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 16:10:59,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-07-19 16:10:59,207 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 13 [2022-07-19 16:10:59,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:10:59,207 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-07-19 16:10:59,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 16:10:59,207 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-07-19 16:10:59,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-19 16:10:59,208 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:10:59,208 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:10:59,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 16:10:59,208 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:10:59,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:10:59,209 INFO L85 PathProgramCache]: Analyzing trace with hash 380169759, now seen corresponding path program 1 times [2022-07-19 16:10:59,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:10:59,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668152229] [2022-07-19 16:10:59,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:10:59,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:10:59,222 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:10:59,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [11100540] [2022-07-19 16:10:59,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:10:59,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:10:59,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:10:59,225 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) [2022-07-19 16:10:59,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 16:10:59,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:10:59,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 16:10:59,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:10:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 16:10:59,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 16:10:59,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:10:59,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668152229] [2022-07-19 16:10:59,374 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:10:59,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11100540] [2022-07-19 16:10:59,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11100540] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 16:10:59,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 16:10:59,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 16:10:59,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473839305] [2022-07-19 16:10:59,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 16:10:59,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 16:10:59,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:10:59,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 16:10:59,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 16:10:59,375 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 16:10:59,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:10:59,422 INFO L93 Difference]: Finished difference Result 61 states and 83 transitions. [2022-07-19 16:10:59,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 16:10:59,423 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-07-19 16:10:59,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:10:59,428 INFO L225 Difference]: With dead ends: 61 [2022-07-19 16:10:59,428 INFO L226 Difference]: Without dead ends: 46 [2022-07-19 16:10:59,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 16:10:59,429 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 10 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 16:10:59,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 105 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 16:10:59,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-19 16:10:59,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-07-19 16:10:59,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 30 states have internal predecessors, (36), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-19 16:10:59,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2022-07-19 16:10:59,437 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 18 [2022-07-19 16:10:59,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:10:59,437 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2022-07-19 16:10:59,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 16:10:59,437 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2022-07-19 16:10:59,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-19 16:10:59,438 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:10:59,438 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:10:59,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 16:10:59,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:10:59,656 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:10:59,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:10:59,657 INFO L85 PathProgramCache]: Analyzing trace with hash -461064832, now seen corresponding path program 1 times [2022-07-19 16:10:59,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:10:59,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472417382] [2022-07-19 16:10:59,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:10:59,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:10:59,665 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:10:59,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1381063112] [2022-07-19 16:10:59,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:10:59,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:10:59,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:10:59,670 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) [2022-07-19 16:10:59,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 16:10:59,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:10:59,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 16:10:59,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:10:59,793 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 16:10:59,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 16:10:59,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:10:59,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472417382] [2022-07-19 16:10:59,794 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:10:59,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381063112] [2022-07-19 16:10:59,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381063112] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 16:10:59,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 16:10:59,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 16:10:59,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688324731] [2022-07-19 16:10:59,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 16:10:59,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 16:10:59,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:10:59,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 16:10:59,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 16:10:59,796 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 16:10:59,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:10:59,840 INFO L93 Difference]: Finished difference Result 60 states and 79 transitions. [2022-07-19 16:10:59,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 16:10:59,840 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-07-19 16:10:59,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:10:59,841 INFO L225 Difference]: With dead ends: 60 [2022-07-19 16:10:59,841 INFO L226 Difference]: Without dead ends: 52 [2022-07-19 16:10:59,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 16:10:59,843 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 16:10:59,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 79 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 16:10:59,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-19 16:10:59,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-07-19 16:10:59,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.28125) internal successors, (41), 34 states have internal predecessors, (41), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-19 16:10:59,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2022-07-19 16:10:59,849 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 26 [2022-07-19 16:10:59,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:10:59,850 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2022-07-19 16:10:59,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 16:10:59,850 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2022-07-19 16:10:59,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-19 16:10:59,851 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:10:59,851 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:10:59,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 16:11:00,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-19 16:11:00,056 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:11:00,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:11:00,056 INFO L85 PathProgramCache]: Analyzing trace with hash -909290541, now seen corresponding path program 1 times [2022-07-19 16:11:00,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:11:00,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573543220] [2022-07-19 16:11:00,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:11:00,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:11:00,064 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:11:00,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [991467263] [2022-07-19 16:11:00,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:11:00,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:11:00,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:11:00,073 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) [2022-07-19 16:11:00,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 16:11:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:11:00,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 16:11:00,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:11:00,169 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 16:11:00,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:11:00,226 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 16:11:00,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:11:00,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573543220] [2022-07-19 16:11:00,226 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:11:00,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991467263] [2022-07-19 16:11:00,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991467263] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 16:11:00,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 16:11:00,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-07-19 16:11:00,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100338288] [2022-07-19 16:11:00,227 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 16:11:00,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 16:11:00,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:11:00,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 16:11:00,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-19 16:11:00,228 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-19 16:11:00,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:11:00,321 INFO L93 Difference]: Finished difference Result 140 states and 173 transitions. [2022-07-19 16:11:00,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 16:11:00,322 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), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 33 [2022-07-19 16:11:00,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:11:00,325 INFO L225 Difference]: With dead ends: 140 [2022-07-19 16:11:00,325 INFO L226 Difference]: Without dead ends: 115 [2022-07-19 16:11:00,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-19 16:11:00,328 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 50 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 16:11:00,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 153 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 16:11:00,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-19 16:11:00,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 108. [2022-07-19 16:11:00,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 73 states have internal predecessors, (85), 23 states have call successors, (23), 14 states have call predecessors, (23), 14 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-19 16:11:00,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 129 transitions. [2022-07-19 16:11:00,346 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 129 transitions. Word has length 33 [2022-07-19 16:11:00,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:11:00,347 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 129 transitions. [2022-07-19 16:11:00,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-19 16:11:00,347 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 129 transitions. [2022-07-19 16:11:00,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-19 16:11:00,347 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:11:00,347 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-19 16:11:00,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 16:11:00,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:11:00,552 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:11:00,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:11:00,552 INFO L85 PathProgramCache]: Analyzing trace with hash 252591112, now seen corresponding path program 1 times [2022-07-19 16:11:00,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:11:00,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617327402] [2022-07-19 16:11:00,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:11:00,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:11:00,566 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:11:00,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [322634651] [2022-07-19 16:11:00,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:11:00,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:11:00,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:11:00,574 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) [2022-07-19 16:11:00,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 16:11:00,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:11:00,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-19 16:11:00,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:11:00,703 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 16:11:00,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:11:00,769 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 16:11:00,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:11:00,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617327402] [2022-07-19 16:11:00,769 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:11:00,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322634651] [2022-07-19 16:11:00,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322634651] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 16:11:00,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:11:00,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-07-19 16:11:00,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604115283] [2022-07-19 16:11:00,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 16:11:00,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 16:11:00,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:11:00,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 16:11:00,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 16:11:00,771 INFO L87 Difference]: Start difference. First operand 108 states and 129 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 16:11:01,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:11:01,176 INFO L93 Difference]: Finished difference Result 125 states and 150 transitions. [2022-07-19 16:11:01,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 16:11:01,176 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2022-07-19 16:11:01,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:11:01,177 INFO L225 Difference]: With dead ends: 125 [2022-07-19 16:11:01,177 INFO L226 Difference]: Without dead ends: 121 [2022-07-19 16:11:01,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 16:11:01,178 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 16:11:01,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 87 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 16:11:01,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-19 16:11:01,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2022-07-19 16:11:01,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 80 states have internal predecessors, (91), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-19 16:11:01,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 139 transitions. [2022-07-19 16:11:01,188 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 139 transitions. Word has length 36 [2022-07-19 16:11:01,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:11:01,189 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 139 transitions. [2022-07-19 16:11:01,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 16:11:01,189 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 139 transitions. [2022-07-19 16:11:01,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-19 16:11:01,191 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:11:01,191 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:11:01,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-19 16:11:01,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:11:01,400 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:11:01,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:11:01,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1605675221, now seen corresponding path program 1 times [2022-07-19 16:11:01,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:11:01,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097568335] [2022-07-19 16:11:01,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:11:01,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:11:01,428 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:11:01,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1408635953] [2022-07-19 16:11:01,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:11:01,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:11:01,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:11:01,433 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) [2022-07-19 16:11:01,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 16:11:01,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:11:01,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 16:11:01,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:11:01,552 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-19 16:11:01,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:11:01,613 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 16:11:01,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:11:01,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097568335] [2022-07-19 16:11:01,614 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:11:01,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408635953] [2022-07-19 16:11:01,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408635953] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 16:11:01,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 16:11:01,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2022-07-19 16:11:01,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049793394] [2022-07-19 16:11:01,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 16:11:01,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 16:11:01,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:11:01,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 16:11:01,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-19 16:11:01,619 INFO L87 Difference]: Start difference. First operand 118 states and 139 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-07-19 16:11:01,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:11:01,727 INFO L93 Difference]: Finished difference Result 194 states and 232 transitions. [2022-07-19 16:11:01,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 16:11:01,727 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 49 [2022-07-19 16:11:01,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:11:01,730 INFO L225 Difference]: With dead ends: 194 [2022-07-19 16:11:01,731 INFO L226 Difference]: Without dead ends: 173 [2022-07-19 16:11:01,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-07-19 16:11:01,733 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 51 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 16:11:01,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 234 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 16:11:01,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-07-19 16:11:01,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 168. [2022-07-19 16:11:01,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 110 states have (on average 1.1818181818181819) internal successors, (130), 116 states have internal predecessors, (130), 37 states have call successors, (37), 21 states have call predecessors, (37), 20 states have return successors, (34), 30 states have call predecessors, (34), 34 states have call successors, (34) [2022-07-19 16:11:01,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 201 transitions. [2022-07-19 16:11:01,747 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 201 transitions. Word has length 49 [2022-07-19 16:11:01,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:11:01,747 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 201 transitions. [2022-07-19 16:11:01,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-07-19 16:11:01,748 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 201 transitions. [2022-07-19 16:11:01,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-19 16:11:01,749 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:11:01,749 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:11:01,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 16:11:01,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:11:01,967 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:11:01,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:11:01,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1800695307, now seen corresponding path program 1 times [2022-07-19 16:11:01,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:11:01,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605925105] [2022-07-19 16:11:01,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:11:01,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:11:01,988 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:11:01,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290196679] [2022-07-19 16:11:01,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:11:01,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:11:01,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:11:01,992 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) [2022-07-19 16:11:01,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 16:11:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:11:02,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-19 16:11:02,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:11:02,244 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-19 16:11:02,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:11:03,071 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-19 16:11:03,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:11:03,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605925105] [2022-07-19 16:11:03,072 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:11:03,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290196679] [2022-07-19 16:11:03,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290196679] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 16:11:03,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 16:11:03,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-07-19 16:11:03,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533472210] [2022-07-19 16:11:03,073 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 16:11:03,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 16:11:03,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:11:03,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 16:11:03,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-19 16:11:03,074 INFO L87 Difference]: Start difference. First operand 168 states and 201 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-19 16:11:05,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:11:05,451 INFO L93 Difference]: Finished difference Result 266 states and 340 transitions. [2022-07-19 16:11:05,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 16:11:05,452 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 58 [2022-07-19 16:11:05,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:11:05,453 INFO L225 Difference]: With dead ends: 266 [2022-07-19 16:11:05,453 INFO L226 Difference]: Without dead ends: 221 [2022-07-19 16:11:05,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-19 16:11:05,454 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 50 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 16:11:05,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 179 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 16:11:05,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-07-19 16:11:05,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 208. [2022-07-19 16:11:05,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 140 states have (on average 1.2214285714285715) internal successors, (171), 146 states have internal predecessors, (171), 43 states have call successors, (43), 24 states have call predecessors, (43), 24 states have return successors, (41), 37 states have call predecessors, (41), 41 states have call successors, (41) [2022-07-19 16:11:05,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 255 transitions. [2022-07-19 16:11:05,495 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 255 transitions. Word has length 58 [2022-07-19 16:11:05,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:11:05,496 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 255 transitions. [2022-07-19 16:11:05,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-19 16:11:05,496 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 255 transitions. [2022-07-19 16:11:05,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-19 16:11:05,501 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:11:05,501 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:11:05,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 16:11:05,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:11:05,703 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:11:05,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:11:05,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1688778742, now seen corresponding path program 1 times [2022-07-19 16:11:05,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:11:05,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121177689] [2022-07-19 16:11:05,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:11:05,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:11:05,710 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:11:05,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559083800] [2022-07-19 16:11:05,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:11:05,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:11:05,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:11:05,714 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 16:11:05,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 16:11:05,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:11:05,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-19 16:11:05,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:11:06,057 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 66 proven. 13 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-19 16:11:06,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:11:06,207 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-07-19 16:11:06,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:11:06,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121177689] [2022-07-19 16:11:06,207 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:11:06,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559083800] [2022-07-19 16:11:06,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559083800] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 16:11:06,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 16:11:06,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-07-19 16:11:06,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687644321] [2022-07-19 16:11:06,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 16:11:06,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 16:11:06,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:11:06,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 16:11:06,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-07-19 16:11:06,210 INFO L87 Difference]: Start difference. First operand 208 states and 255 transitions. Second operand has 16 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-07-19 16:11:06,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:11:06,562 INFO L93 Difference]: Finished difference Result 256 states and 316 transitions. [2022-07-19 16:11:06,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 16:11:06,563 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 69 [2022-07-19 16:11:06,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:11:06,564 INFO L225 Difference]: With dead ends: 256 [2022-07-19 16:11:06,564 INFO L226 Difference]: Without dead ends: 180 [2022-07-19 16:11:06,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-07-19 16:11:06,565 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 50 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 16:11:06,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 143 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 16:11:06,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-07-19 16:11:06,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 169. [2022-07-19 16:11:06,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 113 states have (on average 1.1858407079646018) internal successors, (134), 117 states have internal predecessors, (134), 34 states have call successors, (34), 22 states have call predecessors, (34), 21 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-19 16:11:06,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 200 transitions. [2022-07-19 16:11:06,576 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 200 transitions. Word has length 69 [2022-07-19 16:11:06,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:11:06,577 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 200 transitions. [2022-07-19 16:11:06,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-07-19 16:11:06,577 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 200 transitions. [2022-07-19 16:11:06,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-19 16:11:06,578 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:11:06,578 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:11:06,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 16:11:06,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:11:06,798 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:11:06,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:11:06,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1687889621, now seen corresponding path program 1 times [2022-07-19 16:11:06,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:11:06,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699074367] [2022-07-19 16:11:06,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:11:06,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:11:06,805 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:11:06,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [270976689] [2022-07-19 16:11:06,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:11:06,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:11:06,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:11:06,812 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 16:11:06,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 16:11:06,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:11:06,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 16:11:06,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:11:06,928 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-07-19 16:11:06,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 16:11:06,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:11:06,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699074367] [2022-07-19 16:11:06,928 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:11:06,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270976689] [2022-07-19 16:11:06,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270976689] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 16:11:06,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 16:11:06,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 16:11:06,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045411378] [2022-07-19 16:11:06,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 16:11:06,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 16:11:06,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:11:06,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 16:11:06,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-19 16:11:06,930 INFO L87 Difference]: Start difference. First operand 169 states and 200 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-19 16:11:06,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:11:06,971 INFO L93 Difference]: Finished difference Result 188 states and 223 transitions. [2022-07-19 16:11:06,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 16:11:06,972 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 78 [2022-07-19 16:11:06,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:11:06,973 INFO L225 Difference]: With dead ends: 188 [2022-07-19 16:11:06,973 INFO L226 Difference]: Without dead ends: 168 [2022-07-19 16:11:06,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-19 16:11:06,974 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 16:11:06,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 77 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 16:11:06,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-19 16:11:06,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 163. [2022-07-19 16:11:06,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 110 states have (on average 1.1727272727272726) internal successors, (129), 112 states have internal predecessors, (129), 32 states have call successors, (32), 20 states have call predecessors, (32), 20 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2022-07-19 16:11:06,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 192 transitions. [2022-07-19 16:11:06,996 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 192 transitions. Word has length 78 [2022-07-19 16:11:06,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:11:06,996 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 192 transitions. [2022-07-19 16:11:06,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-19 16:11:06,997 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 192 transitions. [2022-07-19 16:11:06,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-19 16:11:06,997 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:11:06,997 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:11:07,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-19 16:11:07,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 16:11:07,213 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:11:07,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:11:07,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1496336062, now seen corresponding path program 1 times [2022-07-19 16:11:07,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:11:07,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665179356] [2022-07-19 16:11:07,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:11:07,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:11:07,220 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:11:07,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1857690308] [2022-07-19 16:11:07,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:11:07,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:11:07,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:11:07,222 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 16:11:07,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 16:11:07,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:11:07,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 16:11:07,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:11:07,354 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 72 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-19 16:11:07,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:11:07,410 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 26 proven. 44 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-07-19 16:11:07,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:11:07,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665179356] [2022-07-19 16:11:07,411 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:11:07,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857690308] [2022-07-19 16:11:07,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857690308] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 16:11:07,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 16:11:07,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2022-07-19 16:11:07,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276277594] [2022-07-19 16:11:07,412 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 16:11:07,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 16:11:07,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:11:07,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 16:11:07,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-07-19 16:11:07,413 INFO L87 Difference]: Start difference. First operand 163 states and 192 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 5 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2022-07-19 16:11:07,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:11:07,486 INFO L93 Difference]: Finished difference Result 224 states and 276 transitions. [2022-07-19 16:11:07,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 16:11:07,486 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 5 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) Word has length 87 [2022-07-19 16:11:07,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:11:07,487 INFO L225 Difference]: With dead ends: 224 [2022-07-19 16:11:07,487 INFO L226 Difference]: Without dead ends: 165 [2022-07-19 16:11:07,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-07-19 16:11:07,488 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 11 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 16:11:07,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 164 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 16:11:07,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-19 16:11:07,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-07-19 16:11:07,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 112 states have (on average 1.1696428571428572) internal successors, (131), 114 states have internal predecessors, (131), 32 states have call successors, (32), 20 states have call predecessors, (32), 20 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2022-07-19 16:11:07,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 194 transitions. [2022-07-19 16:11:07,498 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 194 transitions. Word has length 87 [2022-07-19 16:11:07,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:11:07,498 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 194 transitions. [2022-07-19 16:11:07,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 5 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2022-07-19 16:11:07,499 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 194 transitions. [2022-07-19 16:11:07,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-19 16:11:07,499 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:11:07,499 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-07-19 16:11:07,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 16:11:07,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-19 16:11:07,716 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:11:07,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:11:07,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1611798954, now seen corresponding path program 2 times [2022-07-19 16:11:07,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:11:07,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300644516] [2022-07-19 16:11:07,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:11:07,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:11:07,723 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:11:07,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [613055033] [2022-07-19 16:11:07,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 16:11:07,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:11:07,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:11:07,725 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 16:11:07,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 16:11:07,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 16:11:07,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:11:07,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-19 16:11:07,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:11:07,878 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 322 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-19 16:11:07,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:11:07,942 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-07-19 16:11:07,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:11:07,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300644516] [2022-07-19 16:11:07,943 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:11:07,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613055033] [2022-07-19 16:11:07,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613055033] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 16:11:07,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 16:11:07,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2022-07-19 16:11:07,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931724385] [2022-07-19 16:11:07,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 16:11:07,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 16:11:07,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:11:07,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 16:11:07,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-07-19 16:11:07,945 INFO L87 Difference]: Start difference. First operand 165 states and 194 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 6 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2022-07-19 16:11:08,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:11:08,027 INFO L93 Difference]: Finished difference Result 212 states and 252 transitions. [2022-07-19 16:11:08,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 16:11:08,028 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 6 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) Word has length 90 [2022-07-19 16:11:08,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:11:08,029 INFO L225 Difference]: With dead ends: 212 [2022-07-19 16:11:08,029 INFO L226 Difference]: Without dead ends: 155 [2022-07-19 16:11:08,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-07-19 16:11:08,030 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 41 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 16:11:08,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 205 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 16:11:08,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-07-19 16:11:08,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 145. [2022-07-19 16:11:08,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 98 states have (on average 1.0816326530612246) internal successors, (106), 101 states have internal predecessors, (106), 26 states have call successors, (26), 20 states have call predecessors, (26), 20 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-19 16:11:08,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 157 transitions. [2022-07-19 16:11:08,039 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 157 transitions. Word has length 90 [2022-07-19 16:11:08,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:11:08,039 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 157 transitions. [2022-07-19 16:11:08,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 6 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2022-07-19 16:11:08,039 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 157 transitions. [2022-07-19 16:11:08,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-19 16:11:08,040 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:11:08,040 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:11:08,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 16:11:08,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-19 16:11:08,257 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:11:08,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:11:08,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1610071076, now seen corresponding path program 1 times [2022-07-19 16:11:08,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:11:08,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292268757] [2022-07-19 16:11:08,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:11:08,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:11:08,264 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:11:08,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1230741665] [2022-07-19 16:11:08,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:11:08,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:11:08,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:11:08,279 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 16:11:08,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 16:11:08,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:11:08,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-19 16:11:08,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:11:08,598 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 26 proven. 28 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-07-19 16:11:08,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:11:35,395 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 26 proven. 28 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-07-19 16:11:35,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:11:35,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292268757] [2022-07-19 16:11:35,396 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:11:35,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230741665] [2022-07-19 16:11:35,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230741665] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 16:11:35,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 16:11:35,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-07-19 16:11:35,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740399919] [2022-07-19 16:11:35,396 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 16:11:35,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 16:11:35,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:11:35,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 16:11:35,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-07-19 16:11:35,397 INFO L87 Difference]: Start difference. First operand 145 states and 157 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 10 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-07-19 16:11:36,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:11:36,826 INFO L93 Difference]: Finished difference Result 177 states and 191 transitions. [2022-07-19 16:11:36,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 16:11:36,827 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 10 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 90 [2022-07-19 16:11:36,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:11:36,828 INFO L225 Difference]: With dead ends: 177 [2022-07-19 16:11:36,828 INFO L226 Difference]: Without dead ends: 175 [2022-07-19 16:11:36,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-07-19 16:11:36,830 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 49 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-19 16:11:36,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 351 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-19 16:11:36,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-07-19 16:11:36,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 148. [2022-07-19 16:11:36,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 104 states have internal predecessors, (109), 25 states have call successors, (25), 21 states have call predecessors, (25), 21 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-07-19 16:11:36,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 158 transitions. [2022-07-19 16:11:36,842 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 158 transitions. Word has length 90 [2022-07-19 16:11:36,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:11:36,843 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 158 transitions. [2022-07-19 16:11:36,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 10 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-07-19 16:11:36,844 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 158 transitions. [2022-07-19 16:11:36,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-19 16:11:36,845 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:11:36,845 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:11:36,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 16:11:37,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-19 16:11:37,060 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:11:37,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:11:37,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1390349825, now seen corresponding path program 2 times [2022-07-19 16:11:37,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:11:37,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498381839] [2022-07-19 16:11:37,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:11:37,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:11:37,075 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:11:37,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [35877388] [2022-07-19 16:11:37,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 16:11:37,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:11:37,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:11:37,080 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 16:11:37,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 16:11:37,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 16:11:37,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-07-19 16:11:37,125 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 16:11:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 16:11:37,168 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 16:11:37,169 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 16:11:37,169 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-19 16:11:37,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 16:11:37,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-19 16:11:37,390 INFO L356 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:11:37,393 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-19 16:11:37,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 04:11:37 BoogieIcfgContainer [2022-07-19 16:11:37,427 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-19 16:11:37,428 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-19 16:11:37,428 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-19 16:11:37,428 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-19 16:11:37,428 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 04:10:58" (3/4) ... [2022-07-19 16:11:37,429 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-19 16:11:37,465 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-19 16:11:37,466 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-19 16:11:37,466 INFO L158 Benchmark]: Toolchain (without parser) took 39510.58ms. Allocated memory was 104.9MB in the beginning and 142.6MB in the end (delta: 37.7MB). Free memory was 74.2MB in the beginning and 52.2MB in the end (delta: 22.0MB). Peak memory consumption was 59.4MB. Max. memory is 16.1GB. [2022-07-19 16:11:37,466 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 86.0MB. Free memory is still 48.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 16:11:37,466 INFO L158 Benchmark]: CACSL2BoogieTranslator took 226.49ms. Allocated memory is still 104.9MB. Free memory was 73.9MB in the beginning and 80.1MB in the end (delta: -6.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-19 16:11:37,467 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.39ms. Allocated memory is still 104.9MB. Free memory was 80.1MB in the beginning and 78.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 16:11:37,467 INFO L158 Benchmark]: Boogie Preprocessor took 34.91ms. Allocated memory is still 104.9MB. Free memory was 78.4MB in the beginning and 77.3MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 16:11:37,467 INFO L158 Benchmark]: RCFGBuilder took 238.22ms. Allocated memory is still 104.9MB. Free memory was 77.3MB in the beginning and 67.9MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-19 16:11:37,467 INFO L158 Benchmark]: TraceAbstraction took 38932.75ms. Allocated memory was 104.9MB in the beginning and 142.6MB in the end (delta: 37.7MB). Free memory was 67.2MB in the beginning and 56.4MB in the end (delta: 10.8MB). Peak memory consumption was 51.7MB. Max. memory is 16.1GB. [2022-07-19 16:11:37,468 INFO L158 Benchmark]: Witness Printer took 37.92ms. Allocated memory is still 142.6MB. Free memory was 56.4MB in the beginning and 52.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-19 16:11:37,469 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 86.0MB. Free memory is still 48.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 226.49ms. Allocated memory is still 104.9MB. Free memory was 73.9MB in the beginning and 80.1MB in the end (delta: -6.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.39ms. Allocated memory is still 104.9MB. Free memory was 80.1MB in the beginning and 78.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.91ms. Allocated memory is still 104.9MB. Free memory was 78.4MB in the beginning and 77.3MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 238.22ms. Allocated memory is still 104.9MB. Free memory was 77.3MB in the beginning and 67.9MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 38932.75ms. Allocated memory was 104.9MB in the beginning and 142.6MB in the end (delta: 37.7MB). Free memory was 67.2MB in the beginning and 56.4MB in the end (delta: 10.8MB). Peak memory consumption was 51.7MB. Max. memory is 16.1GB. * Witness Printer took 37.92ms. Allocated memory is still 142.6MB. Free memory was 56.4MB in the beginning and 52.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [counter=0] [L24] int A, B; [L25] int r, d, p, q; [L26] A = __VERIFIER_nondet_int() [L27] B = 1 [L29] r = A [L30] d = B [L31] p = 1 [L32] q = 0 VAL [A=7, B=1, counter=0, d=1, p=1, q=0, r=7] [L34] EXPR counter++ VAL [A=7, B=1, counter=1, counter++=0, d=1, p=1, q=0, r=7] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(q == 0) VAL [A=7, B=1, counter=1, d=1, p=1, q=0, r=7] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L36] RET __VERIFIER_assert(r == A) VAL [A=7, B=1, counter=1, d=1, p=1, q=0, r=7] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=7, B=1, counter=1, d=1, p=1, q=0, r=7] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=7, B=1, counter=1, d=2, p=2, q=0, r=7] [L34] EXPR counter++ VAL [A=7, B=1, counter=2, counter++=1, d=2, p=2, q=0, r=7] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L35] RET __VERIFIER_assert(q == 0) VAL [A=7, B=1, counter=2, d=2, p=2, q=0, r=7] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L36] RET __VERIFIER_assert(r == A) VAL [A=7, B=1, counter=2, d=2, p=2, q=0, r=7] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=7, B=1, counter=2, d=2, p=2, q=0, r=7] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=7, B=1, counter=2, d=4, p=4, q=0, r=7] [L34] EXPR counter++ VAL [A=7, B=1, counter=3, counter++=2, d=4, p=4, q=0, r=7] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L35] RET __VERIFIER_assert(q == 0) VAL [A=7, B=1, counter=3, d=4, p=4, q=0, r=7] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L36] RET __VERIFIER_assert(r == A) VAL [A=7, B=1, counter=3, d=4, p=4, q=0, r=7] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=7, B=1, counter=3, d=4, p=4, q=0, r=7] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=7, B=1, counter=3, d=8, p=8, q=0, r=7] [L34] EXPR counter++ VAL [A=7, B=1, counter=4, counter++=3, d=8, p=8, q=0, r=7] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L35] RET __VERIFIER_assert(q == 0) VAL [A=7, B=1, counter=4, d=8, p=8, q=0, r=7] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L36] RET __VERIFIER_assert(r == A) VAL [A=7, B=1, counter=4, d=8, p=8, q=0, r=7] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=7, B=1, counter=4, d=8, p=8, q=0, r=7] [L38] COND TRUE !(r >= d) VAL [A=7, B=1, counter=4, d=8, p=8, q=0, r=7] [L44] EXPR counter++ VAL [A=7, B=1, counter=5, counter++=4, d=8, p=8, q=0, r=7] [L44] COND TRUE counter++<5 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [A=7, B=1, counter=5, d=8, p=8, q=0, r=7] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L46] RET __VERIFIER_assert(d == B*p) VAL [A=7, B=1, counter=5, d=8, p=8, q=0, r=7] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 VAL [A=7, B=1, counter=5, d=4, p=4, q=0, r=7] [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [A=7, B=1, counter=5, d=4, p=4, q=4, r=3] [L44] EXPR counter++ VAL [A=7, B=1, counter=6, counter++=5, d=4, p=4, q=4, r=3] [L44] COND FALSE !(counter++<5) [L58] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=0, counter=6] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=6] [L17] reach_error() VAL [\old(cond)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 38.8s, OverallIterations: 16, TraceHistogramMax: 15, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 5.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 446 SdHoareTripleChecker+Valid, 3.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 389 mSDsluCounter, 2092 SdHoareTripleChecker+Invalid, 2.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1468 mSDsCounter, 291 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1880 IncrementalHoareTripleChecker+Invalid, 2171 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 291 mSolverCounterUnsat, 624 mSDtfsCounter, 1880 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1170 GetRequests, 1048 SyntacticMatches, 12 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 6.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=208occurred in iteration=10, InterpolantAutomatonStates: 113, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 15 MinimizatonAttempts, 98 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 29.7s InterpolantComputationTime, 767 NumberOfCodeBlocks, 767 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 1162 ConstructedInterpolants, 0 QuantifiedInterpolants, 17719 SizeOfPredicates, 27 NumberOfNonLiveVariables, 1689 ConjunctsInSsa, 166 ConjunctsInUnsatCore, 23 InterpolantComputations, 8 PerfectInterpolantSequences, 3194/3648 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-07-19 16:11:37,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE