./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound10.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 8d4ed8c57ce722a6c7368f844e0bd557207245c570ed48ded2021df85adb4676 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 11:17:12,862 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 11:17:12,864 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 11:17:12,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 11:17:12,913 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 11:17:12,915 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 11:17:12,917 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 11:17:12,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 11:17:12,920 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 11:17:12,922 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 11:17:12,923 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 11:17:12,924 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 11:17:12,925 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 11:17:12,927 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 11:17:12,929 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 11:17:12,930 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 11:17:12,931 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 11:17:12,932 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 11:17:12,933 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 11:17:12,934 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 11:17:12,935 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 11:17:12,936 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 11:17:12,937 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 11:17:12,937 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 11:17:12,939 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 11:17:12,939 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 11:17:12,939 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 11:17:12,940 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 11:17:12,940 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 11:17:12,941 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 11:17:12,941 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 11:17:12,942 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 11:17:12,942 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 11:17:12,943 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 11:17:12,943 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 11:17:12,944 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 11:17:12,944 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 11:17:12,944 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 11:17:12,945 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 11:17:12,945 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 11:17:12,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 11:17:12,947 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 11:17:12,961 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 11:17:12,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 11:17:12,966 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 11:17:12,967 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 11:17:12,968 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 11:17:12,968 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 11:17:12,968 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 11:17:12,969 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 11:17:12,969 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 11:17:12,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 11:17:12,970 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 11:17:12,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 11:17:12,970 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 11:17:12,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 11:17:12,970 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 11:17:12,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 11:17:12,971 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 11:17:12,971 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 11:17:12,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 11:17:12,971 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 11:17:12,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 11:17:12,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 11:17:12,972 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 11:17:12,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 11:17:12,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 11:17:12,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 11:17:12,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 11:17:12,973 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 11:17:12,973 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 11:17:12,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 11:17:12,974 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 11:17:12,974 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 11:17:12,974 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 11:17:12,974 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 11:17:12,974 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d4ed8c57ce722a6c7368f844e0bd557207245c570ed48ded2021df85adb4676 [2021-12-17 11:17:13,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 11:17:13,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 11:17:13,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 11:17:13,234 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 11:17:13,235 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 11:17:13,236 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound10.c [2021-12-17 11:17:13,299 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/789e303fd/04b99900f0a346b19680bb54ca38eeae/FLAGfc5c9cb51 [2021-12-17 11:17:13,683 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 11:17:13,684 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound10.c [2021-12-17 11:17:13,692 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/789e303fd/04b99900f0a346b19680bb54ca38eeae/FLAGfc5c9cb51 [2021-12-17 11:17:13,706 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/789e303fd/04b99900f0a346b19680bb54ca38eeae [2021-12-17 11:17:13,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 11:17:13,710 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 11:17:13,713 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 11:17:13,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 11:17:13,716 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 11:17:13,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:17:13" (1/1) ... [2021-12-17 11:17:13,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66b0ccc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:17:13, skipping insertion in model container [2021-12-17 11:17:13,717 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:17:13" (1/1) ... [2021-12-17 11:17:13,722 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 11:17:13,737 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 11:17:13,882 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/cohencu-ll_unwindbound10.c[588,601] [2021-12-17 11:17:13,917 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 11:17:13,925 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 11:17:13,936 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/cohencu-ll_unwindbound10.c[588,601] [2021-12-17 11:17:13,956 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 11:17:13,969 INFO L208 MainTranslator]: Completed translation [2021-12-17 11:17:13,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:17:13 WrapperNode [2021-12-17 11:17:13,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 11:17:13,970 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 11:17:13,970 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 11:17:13,970 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 11:17:13,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:17:13" (1/1) ... [2021-12-17 11:17:13,991 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:17:13" (1/1) ... [2021-12-17 11:17:14,011 INFO L137 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2021-12-17 11:17:14,011 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 11:17:14,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 11:17:14,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 11:17:14,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 11:17:14,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:17:13" (1/1) ... [2021-12-17 11:17:14,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:17:13" (1/1) ... [2021-12-17 11:17:14,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:17:13" (1/1) ... [2021-12-17 11:17:14,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:17:13" (1/1) ... [2021-12-17 11:17:14,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:17:13" (1/1) ... [2021-12-17 11:17:14,035 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:17:13" (1/1) ... [2021-12-17 11:17:14,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:17:13" (1/1) ... [2021-12-17 11:17:14,043 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 11:17:14,045 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 11:17:14,045 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 11:17:14,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 11:17:14,046 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:17:13" (1/1) ... [2021-12-17 11:17:14,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 11:17:14,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:17:14,071 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 11:17:14,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 11:17:14,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 11:17:14,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 11:17:14,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 11:17:14,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 11:17:14,103 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 11:17:14,103 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 11:17:14,147 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 11:17:14,148 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 11:17:14,235 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 11:17:14,239 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 11:17:14,239 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 11:17:14,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:17:14 BoogieIcfgContainer [2021-12-17 11:17:14,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 11:17:14,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 11:17:14,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 11:17:14,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 11:17:14,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 11:17:13" (1/3) ... [2021-12-17 11:17:14,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a8f349 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:17:14, skipping insertion in model container [2021-12-17 11:17:14,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:17:13" (2/3) ... [2021-12-17 11:17:14,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a8f349 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:17:14, skipping insertion in model container [2021-12-17 11:17:14,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:17:14" (3/3) ... [2021-12-17 11:17:14,247 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound10.c [2021-12-17 11:17:14,251 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 11:17:14,251 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 11:17:14,330 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 11:17:14,335 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 11:17:14,341 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 11:17:14,380 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-17 11:17:14,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-17 11:17:14,383 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:17:14,384 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:17:14,384 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:17:14,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:17:14,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1823967074, now seen corresponding path program 1 times [2021-12-17 11:17:14,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:17:14,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268909364] [2021-12-17 11:17:14,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:17:14,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:17:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:17:14,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:17:14,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:17:14,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268909364] [2021-12-17 11:17:14,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268909364] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:17:14,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:17:14,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 11:17:14,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212894520] [2021-12-17 11:17:14,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:17:14,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 11:17:14,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:17:14,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 11:17:14,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 11:17:14,563 INFO L87 Difference]: Start difference. First operand has 26 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-12-17 11:17:14,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:17:14,584 INFO L93 Difference]: Finished difference Result 50 states and 87 transitions. [2021-12-17 11:17:14,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 11:17:14,587 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 7 [2021-12-17 11:17:14,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:17:14,594 INFO L225 Difference]: With dead ends: 50 [2021-12-17 11:17:14,595 INFO L226 Difference]: Without dead ends: 22 [2021-12-17 11:17:14,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 11:17:14,602 INFO L933 BasicCegarLoop]: 37 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, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:17:14,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:17:14,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-17 11:17:14,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-17 11:17:14,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-17 11:17:14,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2021-12-17 11:17:14,638 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 7 [2021-12-17 11:17:14,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:17:14,639 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions. [2021-12-17 11:17:14,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-12-17 11:17:14,639 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions. [2021-12-17 11:17:14,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-17 11:17:14,640 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:17:14,640 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:17:14,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 11:17:14,641 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:17:14,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:17:14,644 INFO L85 PathProgramCache]: Analyzing trace with hash 178926099, now seen corresponding path program 1 times [2021-12-17 11:17:14,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:17:14,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022596368] [2021-12-17 11:17:14,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:17:14,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:17:14,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:17:14,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:17:14,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:17:14,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022596368] [2021-12-17 11:17:14,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022596368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:17:14,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:17:14,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 11:17:14,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308012278] [2021-12-17 11:17:14,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:17:14,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 11:17:14,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:17:14,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 11:17:14,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 11:17:14,732 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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) [2021-12-17 11:17:14,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:17:14,751 INFO L93 Difference]: Finished difference Result 36 states and 52 transitions. [2021-12-17 11:17:14,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 11:17:14,752 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 [2021-12-17 11:17:14,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:17:14,753 INFO L225 Difference]: With dead ends: 36 [2021-12-17 11:17:14,753 INFO L226 Difference]: Without dead ends: 24 [2021-12-17 11:17:14,753 INFO L932 BasicCegarLoop]: 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 [2021-12-17 11:17:14,754 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:17:14,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:17:14,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-17 11:17:14,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-17 11:17:14,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-17 11:17:14,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 35 transitions. [2021-12-17 11:17:14,760 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 35 transitions. Word has length 8 [2021-12-17 11:17:14,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:17:14,760 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 35 transitions. [2021-12-17 11:17:14,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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) [2021-12-17 11:17:14,761 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 35 transitions. [2021-12-17 11:17:14,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-17 11:17:14,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:17:14,761 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:17:14,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 11:17:14,762 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:17:14,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:17:14,762 INFO L85 PathProgramCache]: Analyzing trace with hash 180475231, now seen corresponding path program 1 times [2021-12-17 11:17:14,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:17:14,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973048321] [2021-12-17 11:17:14,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:17:14,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:17:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:17:14,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:17:14,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:17:14,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973048321] [2021-12-17 11:17:14,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973048321] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:17:14,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:17:14,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 11:17:14,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497014056] [2021-12-17 11:17:14,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:17:14,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:17:14,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:17:14,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:17:14,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:17:14,867 INFO L87 Difference]: Start difference. First operand 24 states and 35 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) [2021-12-17 11:17:14,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:17:14,944 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2021-12-17 11:17:14,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 11:17:14,945 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 [2021-12-17 11:17:14,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:17:14,946 INFO L225 Difference]: With dead ends: 30 [2021-12-17 11:17:14,946 INFO L226 Difference]: Without dead ends: 28 [2021-12-17 11:17:14,946 INFO L932 BasicCegarLoop]: 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 [2021-12-17 11:17:14,948 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:17:14,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 84 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:17:14,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-17 11:17:14,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-17 11:17:14,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-17 11:17:14,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2021-12-17 11:17:14,959 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 8 [2021-12-17 11:17:14,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:17:14,959 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2021-12-17 11:17:14,960 INFO L471 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) [2021-12-17 11:17:14,960 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2021-12-17 11:17:14,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-17 11:17:14,960 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:17:14,960 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:17:14,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 11:17:14,961 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:17:14,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:17:14,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1275442234, now seen corresponding path program 1 times [2021-12-17 11:17:14,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:17:14,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852196004] [2021-12-17 11:17:14,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:17:14,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:17:14,970 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:17:14,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [451180675] [2021-12-17 11:17:14,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:17:14,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:17:14,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:17:14,972 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:17:14,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 11:17:15,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:17:15,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 11:17:15,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:17:15,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:17:15,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:17:15,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:17:15,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852196004] [2021-12-17 11:17:15,115 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:17:15,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451180675] [2021-12-17 11:17:15,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451180675] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:17:15,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:17:15,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 11:17:15,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601264353] [2021-12-17 11:17:15,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:17:15,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:17:15,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:17:15,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:17:15,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:17:15,118 INFO L87 Difference]: Start difference. First operand 28 states and 38 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) [2021-12-17 11:17:15,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:17:15,180 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2021-12-17 11:17:15,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 11:17:15,181 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 [2021-12-17 11:17:15,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:17:15,182 INFO L225 Difference]: With dead ends: 46 [2021-12-17 11:17:15,182 INFO L226 Difference]: Without dead ends: 44 [2021-12-17 11:17:15,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 11:17:15,183 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:17:15,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 143 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:17:15,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-17 11:17:15,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2021-12-17 11:17:15,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-17 11:17:15,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2021-12-17 11:17:15,191 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 13 [2021-12-17 11:17:15,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:17:15,191 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2021-12-17 11:17:15,191 INFO L471 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) [2021-12-17 11:17:15,192 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2021-12-17 11:17:15,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-17 11:17:15,192 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:17:15,192 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:17:15,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 11:17:15,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:17:15,409 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:17:15,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:17:15,410 INFO L85 PathProgramCache]: Analyzing trace with hash 427545983, now seen corresponding path program 1 times [2021-12-17 11:17:15,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:17:15,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330576786] [2021-12-17 11:17:15,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:17:15,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:17:15,421 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:17:15,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1817957319] [2021-12-17 11:17:15,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:17:15,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:17:15,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:17:15,423 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:17:15,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 11:17:15,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:17:15,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 11:17:15,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:17:15,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 11:17:15,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:17:15,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:17:15,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330576786] [2021-12-17 11:17:15,561 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:17:15,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817957319] [2021-12-17 11:17:15,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817957319] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:17:15,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:17:15,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 11:17:15,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794098063] [2021-12-17 11:17:15,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:17:15,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:17:15,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:17:15,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:17:15,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:17:15,562 INFO L87 Difference]: Start difference. First operand 34 states and 45 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) [2021-12-17 11:17:15,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:17:15,614 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-12-17 11:17:15,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 11:17:15,615 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 [2021-12-17 11:17:15,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:17:15,616 INFO L225 Difference]: With dead ends: 50 [2021-12-17 11:17:15,618 INFO L226 Difference]: Without dead ends: 48 [2021-12-17 11:17:15,618 INFO L932 BasicCegarLoop]: 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 [2021-12-17 11:17:15,619 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:17:15,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 143 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:17:15,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-17 11:17:15,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-12-17 11:17:15,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-17 11:17:15,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2021-12-17 11:17:15,628 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 18 [2021-12-17 11:17:15,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:17:15,628 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2021-12-17 11:17:15,629 INFO L471 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) [2021-12-17 11:17:15,629 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2021-12-17 11:17:15,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-17 11:17:15,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:17:15,629 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:17:15,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 11:17:15,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:17:15,847 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:17:15,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:17:15,848 INFO L85 PathProgramCache]: Analyzing trace with hash 5607206, now seen corresponding path program 1 times [2021-12-17 11:17:15,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:17:15,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886310178] [2021-12-17 11:17:15,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:17:15,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:17:15,855 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:17:15,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1181604205] [2021-12-17 11:17:15,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:17:15,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:17:15,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:17:15,856 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:17:15,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 11:17:15,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:17:15,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 11:17:15,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:17:15,984 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 11:17:15,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:17:15,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:17:15,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886310178] [2021-12-17 11:17:15,985 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:17:15,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181604205] [2021-12-17 11:17:15,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181604205] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:17:15,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:17:15,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 11:17:15,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920795478] [2021-12-17 11:17:15,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:17:15,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:17:15,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:17:15,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:17:15,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:17:15,989 INFO L87 Difference]: Start difference. First operand 44 states and 60 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, (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) [2021-12-17 11:17:16,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:17:16,048 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2021-12-17 11:17:16,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 11:17:16,048 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, (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 23 [2021-12-17 11:17:16,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:17:16,049 INFO L225 Difference]: With dead ends: 58 [2021-12-17 11:17:16,049 INFO L226 Difference]: Without dead ends: 46 [2021-12-17 11:17:16,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 11:17:16,050 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:17:16,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 141 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:17:16,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-17 11:17:16,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-17 11:17:16,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-17 11:17:16,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2021-12-17 11:17:16,057 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 23 [2021-12-17 11:17:16,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:17:16,057 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2021-12-17 11:17:16,057 INFO L471 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, (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) [2021-12-17 11:17:16,058 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2021-12-17 11:17:16,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-17 11:17:16,058 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:17:16,059 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:17:16,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 11:17:16,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:17:16,272 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:17:16,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:17:16,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1172224904, now seen corresponding path program 1 times [2021-12-17 11:17:16,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:17:16,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498160552] [2021-12-17 11:17:16,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:17:16,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:17:16,279 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:17:16,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224383052] [2021-12-17 11:17:16,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:17:16,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:17:16,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:17:16,285 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:17:16,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 11:17:16,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:17:16,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 11:17:16,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:17:16,401 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-17 11:17:16,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:17:16,489 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-17 11:17:16,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:17:16,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498160552] [2021-12-17 11:17:16,490 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:17:16,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224383052] [2021-12-17 11:17:16,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224383052] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:17:16,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:17:16,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-12-17 11:17:16,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742757162] [2021-12-17 11:17:16,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:17:16,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 11:17:16,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:17:16,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 11:17:16,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-17 11:17:16,492 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-17 11:17:16,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:17:16,634 INFO L93 Difference]: Finished difference Result 116 states and 151 transitions. [2021-12-17 11:17:16,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 11:17:16,638 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 41 [2021-12-17 11:17:16,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:17:16,639 INFO L225 Difference]: With dead ends: 116 [2021-12-17 11:17:16,639 INFO L226 Difference]: Without dead ends: 100 [2021-12-17 11:17:16,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 11:17:16,641 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 65 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:17:16,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 225 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 11:17:16,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-17 11:17:16,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2021-12-17 11:17:16,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 47 states have (on average 1.148936170212766) internal successors, (54), 50 states have internal predecessors, (54), 38 states have call successors, (38), 10 states have call predecessors, (38), 10 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-17 11:17:16,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 127 transitions. [2021-12-17 11:17:16,663 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 127 transitions. Word has length 41 [2021-12-17 11:17:16,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:17:16,664 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 127 transitions. [2021-12-17 11:17:16,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-17 11:17:16,664 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 127 transitions. [2021-12-17 11:17:16,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-17 11:17:16,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:17:16,665 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:17:16,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 11:17:16,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:17:16,879 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:17:16,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:17:16,880 INFO L85 PathProgramCache]: Analyzing trace with hash -680109588, now seen corresponding path program 1 times [2021-12-17 11:17:16,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:17:16,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920582965] [2021-12-17 11:17:16,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:17:16,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:17:16,886 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:17:16,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433704484] [2021-12-17 11:17:16,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:17:16,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:17:16,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:17:16,893 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:17:16,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 11:17:16,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:17:16,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-17 11:17:16,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:17:17,043 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-17 11:17:17,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:17:17,143 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-17 11:17:17,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:17:17,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920582965] [2021-12-17 11:17:17,144 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:17:17,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433704484] [2021-12-17 11:17:17,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433704484] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:17:17,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:17:17,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-12-17 11:17:17,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933493907] [2021-12-17 11:17:17,145 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:17:17,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 11:17:17,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:17:17,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 11:17:17,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 11:17:17,146 INFO L87 Difference]: Start difference. First operand 96 states and 127 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-17 11:17:17,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:17:17,393 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2021-12-17 11:17:17,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 11:17:17,393 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 41 [2021-12-17 11:17:17,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:17:17,394 INFO L225 Difference]: With dead ends: 114 [2021-12-17 11:17:17,394 INFO L226 Difference]: Without dead ends: 112 [2021-12-17 11:17:17,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-17 11:17:17,395 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 11:17:17,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 144 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 11:17:17,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-17 11:17:17,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-12-17 11:17:17,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 59 states have (on average 1.11864406779661) internal successors, (66), 62 states have internal predecessors, (66), 38 states have call successors, (38), 14 states have call predecessors, (38), 14 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-17 11:17:17,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 139 transitions. [2021-12-17 11:17:17,409 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 139 transitions. Word has length 41 [2021-12-17 11:17:17,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:17:17,409 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 139 transitions. [2021-12-17 11:17:17,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-17 11:17:17,409 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 139 transitions. [2021-12-17 11:17:17,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-17 11:17:17,410 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:17:17,410 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:17:17,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 11:17:17,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:17:17,616 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:17:17,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:17:17,616 INFO L85 PathProgramCache]: Analyzing trace with hash -399462631, now seen corresponding path program 2 times [2021-12-17 11:17:17,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:17:17,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045369036] [2021-12-17 11:17:17,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:17:17,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:17:17,623 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:17:17,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709689252] [2021-12-17 11:17:17,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 11:17:17,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:17:17,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:17:17,625 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:17:17,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 11:17:17,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 11:17:17,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:17:17,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-17 11:17:17,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:17:17,774 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-17 11:17:17,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:17:17,901 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-17 11:17:17,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:17:17,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045369036] [2021-12-17 11:17:17,902 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:17:17,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709689252] [2021-12-17 11:17:17,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709689252] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:17:17,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:17:17,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-12-17 11:17:17,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196296577] [2021-12-17 11:17:17,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:17:17,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 11:17:17,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:17:17,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 11:17:17,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 11:17:17,904 INFO L87 Difference]: Start difference. First operand 112 states and 139 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-12-17 11:17:17,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:17:17,979 INFO L93 Difference]: Finished difference Result 118 states and 144 transitions. [2021-12-17 11:17:17,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 11:17:17,980 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 46 [2021-12-17 11:17:17,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:17:17,982 INFO L225 Difference]: With dead ends: 118 [2021-12-17 11:17:17,982 INFO L226 Difference]: Without dead ends: 116 [2021-12-17 11:17:17,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-17 11:17:17,984 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 6 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:17:17,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 241 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 11:17:17,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-17 11:17:18,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-12-17 11:17:18,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 65 states have internal predecessors, (69), 38 states have call successors, (38), 15 states have call predecessors, (38), 15 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-17 11:17:18,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 142 transitions. [2021-12-17 11:17:18,012 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 142 transitions. Word has length 46 [2021-12-17 11:17:18,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:17:18,014 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 142 transitions. [2021-12-17 11:17:18,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-12-17 11:17:18,014 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 142 transitions. [2021-12-17 11:17:18,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 11:17:18,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:17:18,019 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:17:18,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 11:17:18,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:17:18,236 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:17:18,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:17:18,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1802852916, now seen corresponding path program 3 times [2021-12-17 11:17:18,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:17:18,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121991820] [2021-12-17 11:17:18,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:17:18,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:17:18,242 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:17:18,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [708478124] [2021-12-17 11:17:18,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 11:17:18,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:17:18,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:17:18,244 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:17:18,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 11:17:18,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-17 11:17:18,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:17:18,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-17 11:17:18,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:17:18,423 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-17 11:17:18,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:17:18,620 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-17 11:17:18,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:17:18,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121991820] [2021-12-17 11:17:18,620 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:17:18,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708478124] [2021-12-17 11:17:18,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708478124] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:17:18,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:17:18,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-12-17 11:17:18,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456447352] [2021-12-17 11:17:18,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:17:18,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 11:17:18,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:17:18,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 11:17:18,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 11:17:18,622 INFO L87 Difference]: Start difference. First operand 116 states and 142 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 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) [2021-12-17 11:17:18,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:17:18,831 INFO L93 Difference]: Finished difference Result 142 states and 164 transitions. [2021-12-17 11:17:18,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 11:17:18,844 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 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 51 [2021-12-17 11:17:18,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:17:18,845 INFO L225 Difference]: With dead ends: 142 [2021-12-17 11:17:18,845 INFO L226 Difference]: Without dead ends: 131 [2021-12-17 11:17:18,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-17 11:17:18,845 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 11:17:18,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 168 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 11:17:18,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-17 11:17:18,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-12-17 11:17:18,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 80 states have (on average 1.0875) internal successors, (87), 83 states have internal predecessors, (87), 29 states have call successors, (29), 21 states have call predecessors, (29), 21 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-17 11:17:18,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 142 transitions. [2021-12-17 11:17:18,856 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 142 transitions. Word has length 51 [2021-12-17 11:17:18,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:17:18,856 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 142 transitions. [2021-12-17 11:17:18,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 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) [2021-12-17 11:17:18,856 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 142 transitions. [2021-12-17 11:17:18,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 11:17:18,857 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:17:18,857 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:17:18,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 11:17:19,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:17:19,064 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:17:19,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:17:19,064 INFO L85 PathProgramCache]: Analyzing trace with hash 616227619, now seen corresponding path program 1 times [2021-12-17 11:17:19,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:17:19,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636895064] [2021-12-17 11:17:19,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:17:19,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:17:19,070 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:17:19,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1694396727] [2021-12-17 11:17:19,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:17:19,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:17:19,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:17:19,073 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:17:19,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 11:17:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:17:19,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-17 11:17:19,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:17:19,372 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-12-17 11:17:19,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:17:19,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:17:19,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636895064] [2021-12-17 11:17:19,567 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:17:19,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694396727] [2021-12-17 11:17:19,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694396727] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:17:19,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:17:19,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-12-17 11:17:19,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737093079] [2021-12-17 11:17:19,568 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 11:17:19,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 11:17:19,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:17:19,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 11:17:19,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-17 11:17:19,569 INFO L87 Difference]: Start difference. First operand 131 states and 142 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 11:17:19,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:17:19,654 INFO L93 Difference]: Finished difference Result 137 states and 147 transitions. [2021-12-17 11:17:19,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 11:17:19,654 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 67 [2021-12-17 11:17:19,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:17:19,656 INFO L225 Difference]: With dead ends: 137 [2021-12-17 11:17:19,656 INFO L226 Difference]: Without dead ends: 133 [2021-12-17 11:17:19,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-17 11:17:19,658 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:17:19,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 175 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 11:17:19,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-17 11:17:19,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-12-17 11:17:19,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 84 states have internal predecessors, (88), 29 states have call successors, (29), 22 states have call predecessors, (29), 21 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-17 11:17:19,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2021-12-17 11:17:19,669 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 67 [2021-12-17 11:17:19,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:17:19,671 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2021-12-17 11:17:19,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 11:17:19,671 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2021-12-17 11:17:19,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-17 11:17:19,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:17:19,674 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:17:19,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 11:17:19,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-17 11:17:19,891 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:17:19,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:17:19,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1808123650, now seen corresponding path program 1 times [2021-12-17 11:17:19,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:17:19,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492456829] [2021-12-17 11:17:19,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:17:19,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:17:19,897 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:17:19,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1352243574] [2021-12-17 11:17:19,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:17:19,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:17:19,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:17:19,899 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:17:19,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 11:17:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:17:19,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-17 11:17:19,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:17:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-12-17 11:17:20,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:17:20,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:17:20,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492456829] [2021-12-17 11:17:20,414 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:17:20,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352243574] [2021-12-17 11:17:20,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352243574] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:17:20,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:17:20,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-12-17 11:17:20,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287953801] [2021-12-17 11:17:20,415 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 11:17:20,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 11:17:20,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:17:20,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 11:17:20,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-17 11:17:20,416 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-17 11:17:20,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:17:20,492 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions. [2021-12-17 11:17:20,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 11:17:20,493 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 72 [2021-12-17 11:17:20,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:17:20,494 INFO L225 Difference]: With dead ends: 135 [2021-12-17 11:17:20,494 INFO L226 Difference]: Without dead ends: 124 [2021-12-17 11:17:20,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-12-17 11:17:20,494 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:17:20,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 205 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 11:17:20,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-17 11:17:20,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-12-17 11:17:20,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 79 states have internal predecessors, (82), 26 states have call successors, (26), 20 states have call predecessors, (26), 20 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-17 11:17:20,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 132 transitions. [2021-12-17 11:17:20,501 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 132 transitions. Word has length 72 [2021-12-17 11:17:20,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:17:20,502 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 132 transitions. [2021-12-17 11:17:20,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-17 11:17:20,502 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 132 transitions. [2021-12-17 11:17:20,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-17 11:17:20,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:17:20,502 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2021-12-17 11:17:20,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 11:17:20,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:17:20,718 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:17:20,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:17:20,719 INFO L85 PathProgramCache]: Analyzing trace with hash -207258189, now seen corresponding path program 4 times [2021-12-17 11:17:20,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:17:20,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363753429] [2021-12-17 11:17:20,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:17:20,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:17:20,725 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:17:20,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [608573732] [2021-12-17 11:17:20,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 11:17:20,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:17:20,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:17:20,727 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:17:20,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 11:17:21,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 11:17:21,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:17:21,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-17 11:17:21,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:17:22,329 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 71 proven. 65 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2021-12-17 11:17:22,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:17:23,187 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 111 proven. 23 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-17 11:17:23,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:17:23,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363753429] [2021-12-17 11:17:23,187 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:17:23,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608573732] [2021-12-17 11:17:23,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608573732] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:17:23,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:17:23,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-12-17 11:17:23,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821101188] [2021-12-17 11:17:23,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:17:23,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 11:17:23,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:17:23,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 11:17:23,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-12-17 11:17:23,189 INFO L87 Difference]: Start difference. First operand 124 states and 132 transitions. Second operand has 15 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 9 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (21), 9 states have call predecessors, (21), 8 states have call successors, (21) [2021-12-17 11:17:23,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:17:23,576 INFO L93 Difference]: Finished difference Result 134 states and 141 transitions. [2021-12-17 11:17:23,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 11:17:23,577 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 9 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (21), 9 states have call predecessors, (21), 8 states have call successors, (21) Word has length 74 [2021-12-17 11:17:23,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:17:23,578 INFO L225 Difference]: With dead ends: 134 [2021-12-17 11:17:23,578 INFO L226 Difference]: Without dead ends: 132 [2021-12-17 11:17:23,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 125 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-12-17 11:17:23,578 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 11:17:23,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 97 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 11:17:23,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-17 11:17:23,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2021-12-17 11:17:23,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 80 states have (on average 1.05) internal successors, (84), 82 states have internal predecessors, (84), 24 states have call successors, (24), 21 states have call predecessors, (24), 21 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-17 11:17:23,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 131 transitions. [2021-12-17 11:17:23,585 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 131 transitions. Word has length 74 [2021-12-17 11:17:23,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:17:23,585 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 131 transitions. [2021-12-17 11:17:23,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 9 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (21), 9 states have call predecessors, (21), 8 states have call successors, (21) [2021-12-17 11:17:23,585 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 131 transitions. [2021-12-17 11:17:23,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-17 11:17:23,586 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:17:23,586 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:17:23,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 11:17:23,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 11:17:23,792 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:17:23,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:17:23,793 INFO L85 PathProgramCache]: Analyzing trace with hash 308615369, now seen corresponding path program 2 times [2021-12-17 11:17:23,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:17:23,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803391237] [2021-12-17 11:17:23,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:17:23,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:17:23,802 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:17:23,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [958797368] [2021-12-17 11:17:23,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 11:17:23,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:17:23,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:17:23,804 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:17:23,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 11:17:23,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 11:17:23,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:17:23,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-17 11:17:23,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:17:24,187 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 32 proven. 24 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-12-17 11:17:24,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:17:24,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:17:24,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803391237] [2021-12-17 11:17:24,374 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:17:24,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958797368] [2021-12-17 11:17:24,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958797368] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:17:24,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:17:24,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-12-17 11:17:24,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009306405] [2021-12-17 11:17:24,375 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 11:17:24,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 11:17:24,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:17:24,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 11:17:24,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-17 11:17:24,376 INFO L87 Difference]: Start difference. First operand 126 states and 131 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-12-17 11:17:24,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:17:24,518 INFO L93 Difference]: Finished difference Result 134 states and 139 transitions. [2021-12-17 11:17:24,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 11:17:24,518 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 95 [2021-12-17 11:17:24,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:17:24,519 INFO L225 Difference]: With dead ends: 134 [2021-12-17 11:17:24,519 INFO L226 Difference]: Without dead ends: 132 [2021-12-17 11:17:24,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-17 11:17:24,519 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:17:24,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 249 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 11:17:24,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-17 11:17:24,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2021-12-17 11:17:24,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 85 states have internal predecessors, (87), 25 states have call successors, (25), 22 states have call predecessors, (25), 22 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-17 11:17:24,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 136 transitions. [2021-12-17 11:17:24,526 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 136 transitions. Word has length 95 [2021-12-17 11:17:24,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:17:24,526 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 136 transitions. [2021-12-17 11:17:24,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-12-17 11:17:24,526 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 136 transitions. [2021-12-17 11:17:24,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-17 11:17:24,527 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:17:24,527 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:17:24,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 11:17:24,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-17 11:17:24,736 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:17:24,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:17:24,736 INFO L85 PathProgramCache]: Analyzing trace with hash 75049244, now seen corresponding path program 2 times [2021-12-17 11:17:24,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:17:24,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451146777] [2021-12-17 11:17:24,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:17:24,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:17:24,743 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:17:24,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980352771] [2021-12-17 11:17:24,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 11:17:24,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:17:24,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:17:24,745 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:17:24,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 11:17:24,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 11:17:24,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:17:24,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-17 11:17:24,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:17:25,128 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2021-12-17 11:17:25,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:17:25,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:17:25,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451146777] [2021-12-17 11:17:25,291 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:17:25,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980352771] [2021-12-17 11:17:25,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980352771] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:17:25,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:17:25,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-12-17 11:17:25,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899546000] [2021-12-17 11:17:25,291 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 11:17:25,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 11:17:25,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:17:25,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 11:17:25,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-17 11:17:25,292 INFO L87 Difference]: Start difference. First operand 131 states and 136 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-12-17 11:17:25,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:17:25,397 INFO L93 Difference]: Finished difference Result 138 states and 142 transitions. [2021-12-17 11:17:25,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 11:17:25,397 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 100 [2021-12-17 11:17:25,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:17:25,398 INFO L225 Difference]: With dead ends: 138 [2021-12-17 11:17:25,398 INFO L226 Difference]: Without dead ends: 125 [2021-12-17 11:17:25,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-17 11:17:25,399 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:17:25,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 258 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 11:17:25,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-12-17 11:17:25,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-12-17 11:17:25,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 80 states have (on average 1.0375) internal successors, (83), 81 states have internal predecessors, (83), 23 states have call successors, (23), 21 states have call predecessors, (23), 21 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-17 11:17:25,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2021-12-17 11:17:25,405 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 100 [2021-12-17 11:17:25,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:17:25,405 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2021-12-17 11:17:25,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-12-17 11:17:25,405 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2021-12-17 11:17:25,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-17 11:17:25,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:17:25,406 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:17:25,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-17 11:17:25,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-17 11:17:25,619 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:17:25,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:17:25,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1859389073, now seen corresponding path program 3 times [2021-12-17 11:17:25,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:17:25,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750161696] [2021-12-17 11:17:25,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:17:25,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:17:25,626 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:17:25,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724083151] [2021-12-17 11:17:25,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 11:17:25,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:17:25,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:17:25,630 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:17:25,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-17 11:17:26,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 11:17:26,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:17:26,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-17 11:17:26,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:17:27,034 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 110 proven. 16 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2021-12-17 11:17:27,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:17:27,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:17:27,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750161696] [2021-12-17 11:17:27,386 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:17:27,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724083151] [2021-12-17 11:17:27,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724083151] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:17:27,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:17:27,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-12-17 11:17:27,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424875127] [2021-12-17 11:17:27,386 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 11:17:27,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 11:17:27,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:17:27,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 11:17:27,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-17 11:17:27,387 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-17 11:17:28,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:17:28,605 INFO L93 Difference]: Finished difference Result 134 states and 138 transitions. [2021-12-17 11:17:28,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 11:17:28,605 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 123 [2021-12-17 11:17:28,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:17:28,606 INFO L225 Difference]: With dead ends: 134 [2021-12-17 11:17:28,606 INFO L226 Difference]: Without dead ends: 132 [2021-12-17 11:17:28,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-12-17 11:17:28,607 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 18 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 11:17:28,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 102 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 11:17:28,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-17 11:17:28,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2021-12-17 11:17:28,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 83 states have (on average 1.036144578313253) internal successors, (86), 85 states have internal predecessors, (86), 25 states have call successors, (25), 22 states have call predecessors, (25), 22 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-17 11:17:28,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2021-12-17 11:17:28,615 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 123 [2021-12-17 11:17:28,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:17:28,615 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2021-12-17 11:17:28,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-17 11:17:28,615 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2021-12-17 11:17:28,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-17 11:17:28,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:17:28,616 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:17:28,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-17 11:17:28,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-17 11:17:28,823 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:17:28,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:17:28,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1602424598, now seen corresponding path program 2 times [2021-12-17 11:17:28,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:17:28,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841511010] [2021-12-17 11:17:28,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:17:28,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:17:28,837 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:17:28,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [219702565] [2021-12-17 11:17:28,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 11:17:28,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:17:28,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:17:28,839 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:17:28,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-17 11:17:28,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 11:17:28,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:17:28,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 11:17:28,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:17:29,071 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 120 proven. 656 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-17 11:17:29,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:17:29,263 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 42 proven. 56 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2021-12-17 11:17:29,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:17:29,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841511010] [2021-12-17 11:17:29,263 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:17:29,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219702565] [2021-12-17 11:17:29,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219702565] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:17:29,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:17:29,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-12-17 11:17:29,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247497552] [2021-12-17 11:17:29,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:17:29,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 11:17:29,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:17:29,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 11:17:29,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-17 11:17:29,265 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) [2021-12-17 11:17:29,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:17:29,580 INFO L93 Difference]: Finished difference Result 390 states and 406 transitions. [2021-12-17 11:17:29,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-17 11:17:29,580 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) Word has length 125 [2021-12-17 11:17:29,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:17:29,583 INFO L225 Difference]: With dead ends: 390 [2021-12-17 11:17:29,583 INFO L226 Difference]: Without dead ends: 365 [2021-12-17 11:17:29,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2021-12-17 11:17:29,584 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 199 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 11:17:29,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 245 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 11:17:29,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-12-17 11:17:29,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 313. [2021-12-17 11:17:29,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 196 states have (on average 1.0459183673469388) internal successors, (205), 203 states have internal predecessors, (205), 63 states have call successors, (63), 54 states have call predecessors, (63), 53 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2021-12-17 11:17:29,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 329 transitions. [2021-12-17 11:17:29,622 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 329 transitions. Word has length 125 [2021-12-17 11:17:29,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:17:29,622 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 329 transitions. [2021-12-17 11:17:29,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) [2021-12-17 11:17:29,623 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 329 transitions. [2021-12-17 11:17:29,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 11:17:29,623 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:17:29,624 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:17:29,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-17 11:17:29,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:17:29,831 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:17:29,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:17:29,832 INFO L85 PathProgramCache]: Analyzing trace with hash 709017654, now seen corresponding path program 3 times [2021-12-17 11:17:29,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:17:29,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158736619] [2021-12-17 11:17:29,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:17:29,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:17:29,837 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:17:29,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1162229967] [2021-12-17 11:17:29,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 11:17:29,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:17:29,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:17:29,838 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:17:29,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-17 11:17:30,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-17 11:17:30,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:17:30,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-17 11:17:30,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:17:30,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 44 proven. 48 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2021-12-17 11:17:30,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:17:30,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:17:30,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158736619] [2021-12-17 11:17:30,905 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:17:30,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162229967] [2021-12-17 11:17:30,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162229967] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:17:30,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:17:30,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-12-17 11:17:30,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132687044] [2021-12-17 11:17:30,905 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 11:17:30,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 11:17:30,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:17:30,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 11:17:30,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-12-17 11:17:30,906 INFO L87 Difference]: Start difference. First operand 313 states and 329 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2021-12-17 11:17:31,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:17:31,062 INFO L93 Difference]: Finished difference Result 323 states and 338 transitions. [2021-12-17 11:17:31,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 11:17:31,062 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 128 [2021-12-17 11:17:31,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:17:31,065 INFO L225 Difference]: With dead ends: 323 [2021-12-17 11:17:31,065 INFO L226 Difference]: Without dead ends: 312 [2021-12-17 11:17:31,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-17 11:17:31,066 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:17:31,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 340 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 11:17:31,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-12-17 11:17:31,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2021-12-17 11:17:31,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 196 states have (on average 1.0408163265306123) internal successors, (204), 202 states have internal predecessors, (204), 62 states have call successors, (62), 54 states have call predecessors, (62), 53 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2021-12-17 11:17:31,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 326 transitions. [2021-12-17 11:17:31,097 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 326 transitions. Word has length 128 [2021-12-17 11:17:31,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:17:31,098 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 326 transitions. [2021-12-17 11:17:31,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2021-12-17 11:17:31,099 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 326 transitions. [2021-12-17 11:17:31,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-17 11:17:31,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:17:31,101 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:17:31,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-17 11:17:31,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-17 11:17:31,306 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:17:31,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:17:31,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1972302768, now seen corresponding path program 4 times [2021-12-17 11:17:31,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:17:31,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970619632] [2021-12-17 11:17:31,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:17:31,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:17:31,312 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:17:31,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999668593] [2021-12-17 11:17:31,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 11:17:31,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:17:31,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:17:31,316 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:17:31,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-17 11:17:32,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 11:17:32,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:17:32,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-17 11:17:32,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:17:33,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1538 backedges. 277 proven. 219 refuted. 0 times theorem prover too weak. 1042 trivial. 0 not checked. [2021-12-17 11:17:33,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:17:36,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:17:36,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970619632] [2021-12-17 11:17:36,543 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:17:36,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999668593] [2021-12-17 11:17:36,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999668593] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:17:36,543 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:17:36,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-12-17 11:17:36,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828087646] [2021-12-17 11:17:36,543 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 11:17:36,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 11:17:36,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:17:36,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 11:17:36,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-12-17 11:17:36,544 INFO L87 Difference]: Start difference. First operand 312 states and 326 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-12-17 11:17:40,681 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:17:44,323 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:17:47,056 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:17:48,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:17:48,264 INFO L93 Difference]: Finished difference Result 319 states and 332 transitions. [2021-12-17 11:17:48,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 11:17:48,265 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 156 [2021-12-17 11:17:48,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:17:48,266 INFO L225 Difference]: With dead ends: 319 [2021-12-17 11:17:48,266 INFO L226 Difference]: Without dead ends: 293 [2021-12-17 11:17:48,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 179 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-12-17 11:17:48,267 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 20 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 35 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2021-12-17 11:17:48,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 120 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 127 Invalid, 1 Unknown, 0 Unchecked, 9.4s Time] [2021-12-17 11:17:48,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-12-17 11:17:48,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2021-12-17 11:17:48,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 188 states have (on average 1.0106382978723405) internal successors, (190), 189 states have internal predecessors, (190), 53 states have call successors, (53), 51 states have call predecessors, (53), 51 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2021-12-17 11:17:48,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 295 transitions. [2021-12-17 11:17:48,281 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 295 transitions. Word has length 156 [2021-12-17 11:17:48,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:17:48,282 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 295 transitions. [2021-12-17 11:17:48,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-12-17 11:17:48,282 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 295 transitions. [2021-12-17 11:17:48,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-12-17 11:17:48,284 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:17:48,284 INFO L514 BasicCegarLoop]: trace histogram [52, 51, 51, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:17:48,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-17 11:17:48,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:17:48,491 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:17:48,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:17:48,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1951591730, now seen corresponding path program 3 times [2021-12-17 11:17:48,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:17:48,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55700896] [2021-12-17 11:17:48,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:17:48,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:17:48,499 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:17:48,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [955821600] [2021-12-17 11:17:48,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 11:17:48,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:17:48,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:17:48,501 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:17:48,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-17 11:17:48,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2021-12-17 11:17:48,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-12-17 11:17:48,703 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-17 11:17:48,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 11:17:48,821 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-17 11:17:48,822 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-17 11:17:48,823 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 11:17:48,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-17 11:17:49,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:17:49,036 INFO L732 BasicCegarLoop]: Path program histogram: [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-17 11:17:49,038 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 11:17:49,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 11:17:49 BoogieIcfgContainer [2021-12-17 11:17:49,107 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 11:17:49,107 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 11:17:49,107 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 11:17:49,107 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 11:17:49,108 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:17:14" (3/4) ... [2021-12-17 11:17:49,109 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-17 11:17:49,187 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-17 11:17:49,188 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 11:17:49,188 INFO L158 Benchmark]: Toolchain (without parser) took 35478.41ms. Allocated memory was 98.6MB in the beginning and 201.3MB in the end (delta: 102.8MB). Free memory was 68.8MB in the beginning and 71.6MB in the end (delta: -2.8MB). Peak memory consumption was 100.9MB. Max. memory is 16.1GB. [2021-12-17 11:17:49,189 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 98.6MB. Free memory is still 55.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 11:17:49,189 INFO L158 Benchmark]: CACSL2BoogieTranslator took 256.57ms. Allocated memory was 98.6MB in the beginning and 127.9MB in the end (delta: 29.4MB). Free memory was 68.8MB in the beginning and 102.7MB in the end (delta: -33.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 11:17:49,189 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.27ms. Allocated memory is still 127.9MB. Free memory was 102.7MB in the beginning and 101.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 11:17:49,189 INFO L158 Benchmark]: Boogie Preprocessor took 31.63ms. Allocated memory is still 127.9MB. Free memory was 101.5MB in the beginning and 100.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 11:17:49,190 INFO L158 Benchmark]: RCFGBuilder took 196.32ms. Allocated memory is still 127.9MB. Free memory was 100.0MB in the beginning and 89.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-17 11:17:49,192 INFO L158 Benchmark]: TraceAbstraction took 34864.64ms. Allocated memory was 127.9MB in the beginning and 201.3MB in the end (delta: 73.4MB). Free memory was 89.5MB in the beginning and 82.2MB in the end (delta: 7.3MB). Peak memory consumption was 82.9MB. Max. memory is 16.1GB. [2021-12-17 11:17:49,193 INFO L158 Benchmark]: Witness Printer took 80.60ms. Allocated memory is still 201.3MB. Free memory was 82.2MB in the beginning and 71.6MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-17 11:17:49,196 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 98.6MB. Free memory is still 55.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 256.57ms. Allocated memory was 98.6MB in the beginning and 127.9MB in the end (delta: 29.4MB). Free memory was 68.8MB in the beginning and 102.7MB in the end (delta: -33.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.27ms. Allocated memory is still 127.9MB. Free memory was 102.7MB in the beginning and 101.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 31.63ms. Allocated memory is still 127.9MB. Free memory was 101.5MB in the beginning and 100.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 196.32ms. Allocated memory is still 127.9MB. Free memory was 100.0MB in the beginning and 89.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 34864.64ms. Allocated memory was 127.9MB in the beginning and 201.3MB in the end (delta: 73.4MB). Free memory was 89.5MB in the beginning and 82.2MB in the end (delta: 7.3MB). Peak memory consumption was 82.9MB. Max. memory is 16.1GB. * Witness Printer took 80.60ms. Allocated memory is still 201.3MB. Free memory was 82.2MB in the beginning and 71.6MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. 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] short a; [L25] long long n, x, y, z; [L26] a = __VERIFIER_nondet_ushort() [L28] n = 0 [L29] x = 0 [L30] y = 1 [L31] z = 6 VAL [a=10, counter=0, n=0, x=0, y=1, z=6] [L33] EXPR counter++ VAL [a=10, counter=1, counter++=0, n=0, x=0, y=1, z=6] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=1, n=0, x=0, y=1, z=6] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=1, n=0, x=0, y=1, z=6] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=1, n=0, x=0, y=1, z=6] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=1, n=0, x=0, y=1, z=6] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=1, n=0, x=0, y=1, z=6] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=1, n=1, x=1, y=7, z=12] [L33] EXPR counter++ VAL [a=10, counter=2, counter++=1, n=1, x=1, y=7, z=12] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=2, n=1, x=1, y=7, z=12] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=2, n=1, x=1, y=7, z=12] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=2, n=1, x=1, y=7, z=12] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=2, n=1, x=1, y=7, z=12] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=2, n=1, x=1, y=7, z=12] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=2, n=2, x=8, y=19, z=18] [L33] EXPR counter++ VAL [a=10, counter=3, counter++=2, n=2, x=8, y=19, z=18] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=3, n=2, x=8, y=19, z=18] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=3, n=2, x=8, y=19, z=18] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=3, n=2, x=8, y=19, z=18] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=3, n=2, x=8, y=19, z=18] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=3, n=2, x=8, y=19, z=18] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=3, n=3, x=27, y=37, z=24] [L33] EXPR counter++ VAL [a=10, counter=4, counter++=3, n=3, x=27, y=37, z=24] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=4, n=3, x=27, y=37, z=24] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=4, n=3, x=27, y=37, z=24] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=4, n=3, x=27, y=37, z=24] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=4, n=3, x=27, y=37, z=24] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=4, n=3, x=27, y=37, z=24] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=4, n=4, x=64, y=61, z=30] [L33] EXPR counter++ VAL [a=10, counter=5, counter++=4, n=4, x=64, y=61, z=30] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=5, n=4, x=64, y=61, z=30] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=5, n=4, x=64, y=61, z=30] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=5, n=4, x=64, y=61, z=30] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=5, n=4, x=64, y=61, z=30] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=5, n=4, x=64, y=61, z=30] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=5, n=5, x=125, y=91, z=36] [L33] EXPR counter++ VAL [a=10, counter=6, counter++=5, n=5, x=125, y=91, z=36] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=6, n=5, x=125, y=91, z=36] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=6, n=5, x=125, y=91, z=36] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=6, n=5, x=125, y=91, z=36] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=6, n=5, x=125, y=91, z=36] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=6, n=5, x=125, y=91, z=36] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=6, n=6, x=216, y=127, z=42] [L33] EXPR counter++ VAL [a=10, counter=7, counter++=6, n=6, x=216, y=127, z=42] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=7, n=6, x=216, y=127, z=42] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=7, n=6, x=216, y=127, z=42] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=7, n=6, x=216, y=127, z=42] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=7, n=6, x=216, y=127, z=42] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=7, n=6, x=216, y=127, z=42] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=7, n=7, x=343, y=169, z=48] [L33] EXPR counter++ VAL [a=10, counter=8, counter++=7, n=7, x=343, y=169, z=48] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=8, n=7, x=343, y=169, z=48] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=8, n=7, x=343, y=169, z=48] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=8, n=7, x=343, y=169, z=48] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=8, n=7, x=343, y=169, z=48] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=8, n=7, x=343, y=169, z=48] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=8, n=8, x=512, y=217, z=54] [L33] EXPR counter++ VAL [a=10, counter=9, counter++=8, n=8, x=512, y=217, z=54] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=9, n=8, x=512, y=217, z=54] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=9, n=8, x=512, y=217, z=54] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=9, n=8, x=512, y=217, z=54] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=9, n=8, x=512, y=217, z=54] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=9, n=8, x=512, y=217, z=54] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=9, n=9, x=729, y=271, z=60] [L33] EXPR counter++ VAL [a=10, counter=10, counter++=9, n=9, x=729, y=271, z=60] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=10, n=9, x=729, y=271, z=60] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=10, n=9, x=729, y=271, z=60] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=10, n=9, x=729, y=271, z=60] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=10, n=9, x=729, y=271, z=60] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=10, n=9, x=729, y=271, z=60] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=10, n=10, x=1000, y=331, z=66] [L33] EXPR counter++ VAL [a=10, counter=11, counter++=10, n=10, x=1000, y=331, z=66] [L33] COND FALSE !(counter++<10) [L48] CALL __VERIFIER_assert(z == 6*n + 6) VAL [\old(cond)=1, counter=11] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=11] [L48] RET __VERIFIER_assert(z == 6*n + 6) VAL [a=10, counter=11, n=10, x=1000, y=331, z=66] [L49] CALL __VERIFIER_assert(6*a*x - x*z + 12*x == 0) VAL [\old(cond)=0, counter=11] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=11] [L17] reach_error() VAL [\old(cond)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 34.7s, OverallIterations: 20, TraceHistogramMax: 52, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 15.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 464 SdHoareTripleChecker+Valid, 12.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 408 mSDsluCounter, 3206 SdHoareTripleChecker+Invalid, 11.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2432 mSDsCounter, 474 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1734 IncrementalHoareTripleChecker+Invalid, 2209 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 474 mSolverCounterUnsat, 774 mSDtfsCounter, 1734 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1839 GetRequests, 1645 SyntacticMatches, 23 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 7.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=313occurred in iteration=17, InterpolantAutomatonStates: 145, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 19 MinimizatonAttempts, 78 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 3.9s SatisfiabilityAnalysisTime, 10.7s InterpolantComputationTime, 1489 NumberOfCodeBlocks, 1299 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 1549 ConstructedInterpolants, 0 QuantifiedInterpolants, 7700 SizeOfPredicates, 44 NumberOfNonLiveVariables, 2484 ConjunctsInSsa, 332 ConjunctsInUnsatCore, 25 InterpolantComputations, 6 PerfectInterpolantSequences, 7277/8458 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! [2021-12-17 11:17:49,227 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