./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/prodbin-ll_valuebound20.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 a95a21aef2f50b6142b75e9167422e223cf73e944019da3877f24b8f537b25b5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 17:03:22,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 17:03:22,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 17:03:22,845 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 17:03:22,845 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 17:03:22,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 17:03:22,848 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 17:03:22,849 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 17:03:22,851 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 17:03:22,855 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 17:03:22,855 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 17:03:22,857 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 17:03:22,857 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 17:03:22,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 17:03:22,859 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 17:03:22,862 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 17:03:22,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 17:03:22,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 17:03:22,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 17:03:22,867 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 17:03:22,869 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 17:03:22,870 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 17:03:22,871 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 17:03:22,872 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 17:03:22,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 17:03:22,875 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 17:03:22,876 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 17:03:22,876 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 17:03:22,877 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 17:03:22,877 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 17:03:22,878 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 17:03:22,878 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 17:03:22,880 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 17:03:22,880 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 17:03:22,881 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 17:03:22,881 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 17:03:22,882 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 17:03:22,882 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 17:03:22,882 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 17:03:22,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 17:03:22,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 17:03:22,884 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 17:03:22,885 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 17:03:22,907 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 17:03:22,907 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 17:03:22,907 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 17:03:22,908 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 17:03:22,908 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 17:03:22,908 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 17:03:22,909 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 17:03:22,909 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 17:03:22,909 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 17:03:22,910 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 17:03:22,910 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 17:03:22,910 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 17:03:22,910 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 17:03:22,910 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 17:03:22,910 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 17:03:22,910 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 17:03:22,910 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 17:03:22,911 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 17:03:22,912 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 17:03:22,912 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 17:03:22,912 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 17:03:22,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 17:03:22,912 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 17:03:22,912 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 17:03:22,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 17:03:22,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 17:03:22,913 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 17:03:22,913 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 17:03:22,913 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 17:03:22,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 17:03:22,913 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 17:03:22,914 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 17:03:22,914 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 17:03:22,914 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a95a21aef2f50b6142b75e9167422e223cf73e944019da3877f24b8f537b25b5 [2022-07-13 17:03:23,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 17:03:23,135 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 17:03:23,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 17:03:23,138 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 17:03:23,138 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 17:03:23,139 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c [2022-07-13 17:03:23,191 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f2332f31/3e8503bc69344aae9e63f37c69610a1d/FLAG1da935091 [2022-07-13 17:03:23,513 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 17:03:23,513 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c [2022-07-13 17:03:23,518 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f2332f31/3e8503bc69344aae9e63f37c69610a1d/FLAG1da935091 [2022-07-13 17:03:23,944 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f2332f31/3e8503bc69344aae9e63f37c69610a1d [2022-07-13 17:03:23,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 17:03:23,946 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 17:03:23,947 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 17:03:23,947 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 17:03:23,950 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 17:03:23,950 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 05:03:23" (1/1) ... [2022-07-13 17:03:23,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b8349a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 05:03:23, skipping insertion in model container [2022-07-13 17:03:23,951 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 05:03:23" (1/1) ... [2022-07-13 17:03:23,955 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 17:03:23,968 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 17:03:24,090 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/prodbin-ll_valuebound20.c[537,550] [2022-07-13 17:03:24,120 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 17:03:24,125 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 17:03:24,136 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/prodbin-ll_valuebound20.c[537,550] [2022-07-13 17:03:24,146 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 17:03:24,155 INFO L208 MainTranslator]: Completed translation [2022-07-13 17:03:24,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 05:03:24 WrapperNode [2022-07-13 17:03:24,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 17:03:24,157 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 17:03:24,157 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 17:03:24,157 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 17:03:24,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 05:03:24" (1/1) ... [2022-07-13 17:03:24,168 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 05:03:24" (1/1) ... [2022-07-13 17:03:24,180 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2022-07-13 17:03:24,181 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 17:03:24,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 17:03:24,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 17:03:24,182 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 17:03:24,187 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 05:03:24" (1/1) ... [2022-07-13 17:03:24,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 05:03:24" (1/1) ... [2022-07-13 17:03:24,193 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 05:03:24" (1/1) ... [2022-07-13 17:03:24,194 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 05:03:24" (1/1) ... [2022-07-13 17:03:24,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 05:03:24" (1/1) ... [2022-07-13 17:03:24,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 05:03:24" (1/1) ... [2022-07-13 17:03:24,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 05:03:24" (1/1) ... [2022-07-13 17:03:24,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 17:03:24,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 17:03:24,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 17:03:24,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 17:03:24,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 05:03:24" (1/1) ... [2022-07-13 17:03:24,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 17:03:24,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 17:03:24,248 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 17:03:24,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 17:03:24,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 17:03:24,273 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-13 17:03:24,274 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-13 17:03:24,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 17:03:24,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 17:03:24,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 17:03:24,274 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-13 17:03:24,274 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-13 17:03:24,316 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 17:03:24,317 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 17:03:24,431 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 17:03:24,436 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 17:03:24,439 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 17:03:24,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 05:03:24 BoogieIcfgContainer [2022-07-13 17:03:24,441 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 17:03:24,442 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 17:03:24,442 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 17:03:24,455 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 17:03:24,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 05:03:23" (1/3) ... [2022-07-13 17:03:24,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19d2c9f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 05:03:24, skipping insertion in model container [2022-07-13 17:03:24,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 05:03:24" (2/3) ... [2022-07-13 17:03:24,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19d2c9f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 05:03:24, skipping insertion in model container [2022-07-13 17:03:24,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 05:03:24" (3/3) ... [2022-07-13 17:03:24,457 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound20.c [2022-07-13 17:03:24,466 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 17:03:24,479 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 17:03:24,528 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 17:03:24,533 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@817303f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7e23192e [2022-07-13 17:03:24,533 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 17:03:24,547 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 17:03:24,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-13 17:03:24,552 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:03:24,557 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:03:24,558 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:03:24,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:03:24,567 INFO L85 PathProgramCache]: Analyzing trace with hash -861605892, now seen corresponding path program 1 times [2022-07-13 17:03:24,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:03:24,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749964754] [2022-07-13 17:03:24,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:03:24,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:03:24,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:03:24,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 17:03:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:03:24,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 17:03:24,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:03:24,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 17:03:24,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:03:24,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 17:03:24,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:03:24,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749964754] [2022-07-13 17:03:24,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749964754] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:03:24,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 17:03:24,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 17:03:24,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497153198] [2022-07-13 17:03:24,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:03:24,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 17:03:24,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:03:24,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 17:03:24,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 17:03:24,749 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 17:03:24,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:03:24,765 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2022-07-13 17:03:24,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 17:03:24,766 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-07-13 17:03:24,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:03:24,770 INFO L225 Difference]: With dead ends: 51 [2022-07-13 17:03:24,770 INFO L226 Difference]: Without dead ends: 23 [2022-07-13 17:03:24,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 17:03:24,777 INFO L413 NwaCegarLoop]: 31 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, 31 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 17:03:24,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 17:03:24,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-13 17:03:24,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-13 17:03:24,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 17:03:24,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-07-13 17:03:24,802 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 24 [2022-07-13 17:03:24,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:03:24,802 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-07-13 17:03:24,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 17:03:24,803 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-07-13 17:03:24,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-13 17:03:24,804 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:03:24,804 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:03:24,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 17:03:24,805 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:03:24,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:03:24,806 INFO L85 PathProgramCache]: Analyzing trace with hash -2010313222, now seen corresponding path program 1 times [2022-07-13 17:03:24,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:03:24,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565349108] [2022-07-13 17:03:24,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:03:24,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:03:24,838 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 17:03:24,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508855550] [2022-07-13 17:03:24,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:03:24,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 17:03:24,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 17:03:24,842 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 17:03:24,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 17:03:24,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:03:24,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 17:03:24,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 17:03:24,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 17:03:24,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 17:03:25,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:03:25,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565349108] [2022-07-13 17:03:25,000 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 17:03:25,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508855550] [2022-07-13 17:03:25,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508855550] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:03:25,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 17:03:25,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 17:03:25,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179045958] [2022-07-13 17:03:25,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:03:25,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 17:03:25,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:03:25,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 17:03:25,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 17:03:25,008 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 17:03:25,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:03:25,066 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-07-13 17:03:25,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 17:03:25,067 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 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 24 [2022-07-13 17:03:25,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:03:25,068 INFO L225 Difference]: With dead ends: 35 [2022-07-13 17:03:25,069 INFO L226 Difference]: Without dead ends: 33 [2022-07-13 17:03:25,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 17:03:25,070 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 17:03:25,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 71 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 17:03:25,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-13 17:03:25,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2022-07-13 17:03:25,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 17:03:25,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-07-13 17:03:25,075 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 24 [2022-07-13 17:03:25,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:03:25,076 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-07-13 17:03:25,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 17:03:25,076 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-07-13 17:03:25,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-13 17:03:25,077 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:03:25,077 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:03:25,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 17:03:25,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 17:03:25,294 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:03:25,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:03:25,295 INFO L85 PathProgramCache]: Analyzing trace with hash -895979555, now seen corresponding path program 1 times [2022-07-13 17:03:25,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:03:25,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402621385] [2022-07-13 17:03:25,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:03:25,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:03:25,303 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 17:03:25,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1965936678] [2022-07-13 17:03:25,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:03:25,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 17:03:25,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 17:03:25,305 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 17:03:25,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 17:03:25,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:03:25,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 17:03:25,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 17:03:25,374 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 17:03:25,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 17:03:25,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:03:25,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402621385] [2022-07-13 17:03:25,377 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 17:03:25,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965936678] [2022-07-13 17:03:25,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965936678] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 17:03:25,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 17:03:25,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 17:03:25,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890782659] [2022-07-13 17:03:25,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 17:03:25,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 17:03:25,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:03:25,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 17:03:25,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 17:03:25,379 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 17:03:25,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:03:25,449 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-07-13 17:03:25,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 17:03:25,449 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-07-13 17:03:25,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:03:25,450 INFO L225 Difference]: With dead ends: 39 [2022-07-13 17:03:25,450 INFO L226 Difference]: Without dead ends: 32 [2022-07-13 17:03:25,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 17:03:25,451 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 17:03:25,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 69 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 17:03:25,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-13 17:03:25,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2022-07-13 17:03:25,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 17:03:25,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-07-13 17:03:25,455 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 30 [2022-07-13 17:03:25,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:03:25,455 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-07-13 17:03:25,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 17:03:25,456 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-07-13 17:03:25,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-13 17:03:25,456 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:03:25,456 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:03:25,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 17:03:25,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-13 17:03:25,675 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:03:25,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:03:25,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1371702355, now seen corresponding path program 1 times [2022-07-13 17:03:25,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:03:25,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500964096] [2022-07-13 17:03:25,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:03:25,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:03:25,706 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 17:03:25,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1007091743] [2022-07-13 17:03:25,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:03:25,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 17:03:25,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 17:03:25,728 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 17:03:25,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 17:03:25,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:03:25,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-13 17:03:25,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 17:03:26,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 17:03:26,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 17:03:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 17:03:29,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:03:29,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500964096] [2022-07-13 17:03:29,407 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 17:03:29,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007091743] [2022-07-13 17:03:29,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007091743] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 17:03:29,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 17:03:29,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 18 [2022-07-13 17:03:29,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285468047] [2022-07-13 17:03:29,408 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 17:03:29,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 17:03:29,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:03:29,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 17:03:29,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-07-13 17:03:29,410 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-13 17:03:31,149 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 17:03:31,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:03:31,189 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2022-07-13 17:03:31,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 17:03:31,190 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 33 [2022-07-13 17:03:31,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:03:31,191 INFO L225 Difference]: With dead ends: 48 [2022-07-13 17:03:31,191 INFO L226 Difference]: Without dead ends: 46 [2022-07-13 17:03:31,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2022-07-13 17:03:31,192 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 37 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-13 17:03:31,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 110 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-13 17:03:31,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-13 17:03:31,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2022-07-13 17:03:31,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-13 17:03:31,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-07-13 17:03:31,198 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 33 [2022-07-13 17:03:31,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:03:31,198 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-07-13 17:03:31,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-13 17:03:31,198 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-07-13 17:03:31,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-13 17:03:31,199 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:03:31,199 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:03:31,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 17:03:31,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 17:03:31,400 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:03:31,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:03:31,400 INFO L85 PathProgramCache]: Analyzing trace with hash 685673296, now seen corresponding path program 1 times [2022-07-13 17:03:31,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:03:31,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306924410] [2022-07-13 17:03:31,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:03:31,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:03:31,407 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 17:03:31,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752763596] [2022-07-13 17:03:31,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:03:31,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 17:03:31,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 17:03:31,413 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 17:03:31,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 17:03:31,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:03:31,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 17:03:31,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 17:03:31,507 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 17:03:31,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 17:03:31,567 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 17:03:31,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:03:31,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306924410] [2022-07-13 17:03:31,567 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 17:03:31,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752763596] [2022-07-13 17:03:31,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752763596] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 17:03:31,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 17:03:31,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-07-13 17:03:31,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218636497] [2022-07-13 17:03:31,568 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 17:03:31,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 17:03:31,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:03:31,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 17:03:31,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-13 17:03:31,569 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-13 17:03:33,583 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 17:03:33,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:03:33,677 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-07-13 17:03:33,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 17:03:33,677 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2022-07-13 17:03:33,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:03:33,678 INFO L225 Difference]: With dead ends: 50 [2022-07-13 17:03:33,678 INFO L226 Difference]: Without dead ends: 43 [2022-07-13 17:03:33,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-07-13 17:03:33,679 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 21 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-13 17:03:33,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 68 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-07-13 17:03:33,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-13 17:03:33,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-07-13 17:03:33,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-13 17:03:33,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-07-13 17:03:33,683 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 39 [2022-07-13 17:03:33,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:03:33,684 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-07-13 17:03:33,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-13 17:03:33,684 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-07-13 17:03:33,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-13 17:03:33,684 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:03:33,685 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:03:33,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 17:03:33,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 17:03:33,896 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:03:33,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:03:33,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1683883622, now seen corresponding path program 1 times [2022-07-13 17:03:33,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:03:33,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066264652] [2022-07-13 17:03:33,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:03:33,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:03:33,904 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 17:03:33,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808855051] [2022-07-13 17:03:33,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:03:33,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 17:03:33,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 17:03:33,920 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 17:03:33,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 17:03:33,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:03:33,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-13 17:03:33,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 17:03:41,292 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 17:03:41,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 17:03:43,253 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 17:03:43,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:03:43,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066264652] [2022-07-13 17:03:43,254 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 17:03:43,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808855051] [2022-07-13 17:03:43,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808855051] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 17:03:43,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 17:03:43,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-07-13 17:03:43,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552742509] [2022-07-13 17:03:43,254 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 17:03:43,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 17:03:43,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:03:43,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 17:03:43,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-07-13 17:03:43,255 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-13 17:03:46,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:03:46,538 INFO L93 Difference]: Finished difference Result 84 states and 100 transitions. [2022-07-13 17:03:46,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 17:03:46,546 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) Word has length 42 [2022-07-13 17:03:46,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:03:46,547 INFO L225 Difference]: With dead ends: 84 [2022-07-13 17:03:46,548 INFO L226 Difference]: Without dead ends: 82 [2022-07-13 17:03:46,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2022-07-13 17:03:46,548 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 49 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 17:03:46,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 123 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 17:03:46,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-13 17:03:46,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2022-07-13 17:03:46,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 60 states have (on average 1.15) internal successors, (69), 63 states have internal predecessors, (69), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-13 17:03:46,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2022-07-13 17:03:46,575 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 42 [2022-07-13 17:03:46,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:03:46,576 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2022-07-13 17:03:46,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-13 17:03:46,577 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2022-07-13 17:03:46,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-13 17:03:46,580 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:03:46,581 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:03:46,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 17:03:46,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 17:03:46,788 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:03:46,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:03:46,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1217167219, now seen corresponding path program 1 times [2022-07-13 17:03:46,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:03:46,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761305599] [2022-07-13 17:03:46,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:03:46,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:03:46,802 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 17:03:46,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735358475] [2022-07-13 17:03:46,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:03:46,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 17:03:46,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 17:03:46,805 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 17:03:46,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 17:03:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 17:03:46,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-13 17:03:46,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 17:04:10,501 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 17:04:10,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 17:04:19,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:04:19,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761305599] [2022-07-13 17:04:19,810 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 17:04:19,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735358475] [2022-07-13 17:04:19,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735358475] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 17:04:19,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-13 17:04:19,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-07-13 17:04:19,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824710880] [2022-07-13 17:04:19,810 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-13 17:04:19,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 17:04:19,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:04:19,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 17:04:19,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=368, Unknown=2, NotChecked=0, Total=462 [2022-07-13 17:04:19,811 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-13 17:04:22,340 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 17:04:25,037 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 [] [2022-07-13 17:04:25,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:04:25,480 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2022-07-13 17:04:25,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 17:04:25,481 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 51 [2022-07-13 17:04:25,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:04:25,482 INFO L225 Difference]: With dead ends: 99 [2022-07-13 17:04:25,482 INFO L226 Difference]: Without dead ends: 97 [2022-07-13 17:04:25,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=105, Invalid=445, Unknown=2, NotChecked=0, Total=552 [2022-07-13 17:04:25,483 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-07-13 17:04:25,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 167 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 335 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2022-07-13 17:04:25,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-13 17:04:25,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 87. [2022-07-13 17:04:25,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 67 states have internal predecessors, (75), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-13 17:04:25,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2022-07-13 17:04:25,513 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 51 [2022-07-13 17:04:25,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:04:25,513 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2022-07-13 17:04:25,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-13 17:04:25,514 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2022-07-13 17:04:25,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-13 17:04:25,515 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:04:25,515 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:04:25,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 17:04:25,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 17:04:25,732 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:04:25,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:04:25,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1448142086, now seen corresponding path program 2 times [2022-07-13 17:04:25,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:04:25,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777466754] [2022-07-13 17:04:25,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:04:25,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:04:25,739 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 17:04:25,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [625454977] [2022-07-13 17:04:25,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 17:04:25,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 17:04:25,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 17:04:25,747 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 17:04:25,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 17:04:25,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 17:04:25,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 17:04:25,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-13 17:04:25,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 17:04:51,061 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-13 17:04:51,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 17:04:56,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:04:56,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777466754] [2022-07-13 17:04:56,515 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 17:04:56,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625454977] [2022-07-13 17:04:56,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625454977] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 17:04:56,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-13 17:04:56,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-07-13 17:04:56,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993909981] [2022-07-13 17:04:56,515 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-13 17:04:56,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 17:04:56,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:04:56,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 17:04:56,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=530, Unknown=1, NotChecked=0, Total=650 [2022-07-13 17:04:56,517 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-13 17:04:59,008 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 17:05:01,785 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 17:05:03,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:05:03,237 INFO L93 Difference]: Finished difference Result 117 states and 136 transitions. [2022-07-13 17:05:03,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 17:05:03,237 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 60 [2022-07-13 17:05:03,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:05:03,238 INFO L225 Difference]: With dead ends: 117 [2022-07-13 17:05:03,238 INFO L226 Difference]: Without dead ends: 115 [2022-07-13 17:05:03,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=132, Invalid=623, Unknown=1, NotChecked=0, Total=756 [2022-07-13 17:05:03,239 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 20 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-07-13 17:05:03,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 275 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-07-13 17:05:03,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-13 17:05:03,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 103. [2022-07-13 17:05:03,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 80 states have internal predecessors, (88), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-13 17:05:03,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-07-13 17:05:03,258 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 60 [2022-07-13 17:05:03,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:05:03,258 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-07-13 17:05:03,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-13 17:05:03,258 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-07-13 17:05:03,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-13 17:05:03,260 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 17:05:03,260 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 17:05:03,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 17:05:03,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 17:05:03,473 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 17:05:03,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 17:05:03,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1307593476, now seen corresponding path program 3 times [2022-07-13 17:05:03,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 17:05:03,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404188311] [2022-07-13 17:05:03,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 17:05:03,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 17:05:03,482 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 17:05:03,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2120380067] [2022-07-13 17:05:03,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 17:05:03,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 17:05:03,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 17:05:03,484 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 17:05:03,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 17:05:03,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-13 17:05:03,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 17:05:03,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-13 17:05:03,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 17:05:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 19 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-13 17:05:04,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 17:05:07,032 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 34 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-13 17:05:07,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 17:05:07,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404188311] [2022-07-13 17:05:07,032 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 17:05:07,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120380067] [2022-07-13 17:05:07,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120380067] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 17:05:07,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 17:05:07,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 31 [2022-07-13 17:05:07,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451481546] [2022-07-13 17:05:07,033 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 17:05:07,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-13 17:05:07,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 17:05:07,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-13 17:05:07,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=753, Unknown=0, NotChecked=0, Total=930 [2022-07-13 17:05:07,035 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 28 states have internal predecessors, (58), 13 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-07-13 17:05:17,608 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 17:05:18,727 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 17:05:22,395 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 17:05:29,976 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 17:05:29,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 17:05:29,982 INFO L93 Difference]: Finished difference Result 128 states and 155 transitions. [2022-07-13 17:05:29,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 17:05:29,982 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 28 states have internal predecessors, (58), 13 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 60 [2022-07-13 17:05:29,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 17:05:29,983 INFO L225 Difference]: With dead ends: 128 [2022-07-13 17:05:29,983 INFO L226 Difference]: Without dead ends: 0 [2022-07-13 17:05:29,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=436, Invalid=1634, Unknown=0, NotChecked=0, Total=2070 [2022-07-13 17:05:29,984 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 54 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2022-07-13 17:05:29,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 133 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 12.7s Time] [2022-07-13 17:05:29,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-13 17:05:29,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-13 17:05:29,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 17:05:29,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-13 17:05:29,985 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 60 [2022-07-13 17:05:29,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 17:05:29,985 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-13 17:05:29,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 28 states have internal predecessors, (58), 13 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-07-13 17:05:29,985 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-13 17:05:29,985 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-13 17:05:29,987 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-13 17:05:30,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 17:05:30,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-13 17:05:30,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-13 17:05:35,136 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-07-13 17:05:35,137 INFO L895 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~a~0#1| 20) (<= 0 |ULTIMATE.start_main_~a~0#1|)) [2022-07-13 17:05:35,137 INFO L895 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 20) (<= |ULTIMATE.start_main_~a~0#1| 20) (<= 0 |ULTIMATE.start_main_~a~0#1|)) [2022-07-13 17:05:35,137 INFO L902 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2022-07-13 17:05:35,137 INFO L899 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2022-07-13 17:05:35,137 INFO L902 garLoopResultBuilder]: At program point L48(lines 20 49) the Hoare annotation is: true [2022-07-13 17:05:35,137 INFO L899 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2022-07-13 17:05:35,137 INFO L895 garLoopResultBuilder]: At program point L34-2(lines 34 45) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~b~0#1| 20) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= 1 |ULTIMATE.start_main_~b~0#1|) (= (+ |ULTIMATE.start_main_~z~0#1| (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) (<= |ULTIMATE.start_main_~a~0#1| 20) (<= 0 |ULTIMATE.start_main_~a~0#1|)) [2022-07-13 17:05:35,137 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-07-13 17:05:35,137 INFO L895 garLoopResultBuilder]: At program point L34-3(lines 34 45) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (and (<= |ULTIMATE.start_main_~b~0#1| 20) (<= 1 |ULTIMATE.start_main_~b~0#1|) (= (+ |ULTIMATE.start_main_~z~0#1| (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) .cse0) (<= |ULTIMATE.start_main_~a~0#1| 20) (= |ULTIMATE.start_main_~z~0#1| .cse0) (<= 0 |ULTIMATE.start_main_~a~0#1|))) [2022-07-13 17:05:35,137 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-07-13 17:05:35,137 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-07-13 17:05:35,137 INFO L899 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2022-07-13 17:05:35,137 INFO L899 garLoopResultBuilder]: For program point L39(lines 39 42) no Hoare annotation was computed. [2022-07-13 17:05:35,137 INFO L899 garLoopResultBuilder]: For program point L39-2(lines 39 42) no Hoare annotation was computed. [2022-07-13 17:05:35,137 INFO L895 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~b~0#1| 20) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= 1 |ULTIMATE.start_main_~b~0#1|) (= (+ |ULTIMATE.start_main_~z~0#1| (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) (<= |ULTIMATE.start_main_~a~0#1| 20) (<= 0 |ULTIMATE.start_main_~a~0#1|)) [2022-07-13 17:05:35,137 INFO L899 garLoopResultBuilder]: For program point L35-1(lines 34 45) no Hoare annotation was computed. [2022-07-13 17:05:35,137 INFO L902 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 9 11) the Hoare annotation is: true [2022-07-13 17:05:35,138 INFO L899 garLoopResultBuilder]: For program point L10(line 10) no Hoare annotation was computed. [2022-07-13 17:05:35,138 INFO L899 garLoopResultBuilder]: For program point L10-2(lines 9 11) no Hoare annotation was computed. [2022-07-13 17:05:35,138 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 9 11) no Hoare annotation was computed. [2022-07-13 17:05:35,138 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 12 18) the Hoare annotation is: true [2022-07-13 17:05:35,138 INFO L899 garLoopResultBuilder]: For program point L14(lines 14 15) no Hoare annotation was computed. [2022-07-13 17:05:35,138 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 16) no Hoare annotation was computed. [2022-07-13 17:05:35,138 INFO L899 garLoopResultBuilder]: For program point L13-2(lines 12 18) no Hoare annotation was computed. [2022-07-13 17:05:35,138 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 12 18) no Hoare annotation was computed. [2022-07-13 17:05:35,138 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2022-07-13 17:05:35,140 INFO L356 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1] [2022-07-13 17:05:35,142 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-13 17:05:35,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 05:05:35 BoogieIcfgContainer [2022-07-13 17:05:35,150 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-13 17:05:35,151 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-13 17:05:35,151 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-13 17:05:35,151 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-13 17:05:35,151 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 05:03:24" (3/4) ... [2022-07-13 17:05:35,153 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-13 17:05:35,157 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2022-07-13 17:05:35,157 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-07-13 17:05:35,159 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2022-07-13 17:05:35,159 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-07-13 17:05:35,160 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-13 17:05:35,160 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-13 17:05:35,178 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-13 17:05:35,179 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-13 17:05:35,179 INFO L158 Benchmark]: Toolchain (without parser) took 131232.91ms. Allocated memory was 86.0MB in the beginning and 132.1MB in the end (delta: 46.1MB). Free memory was 47.4MB in the beginning and 74.7MB in the end (delta: -27.3MB). Peak memory consumption was 20.1MB. Max. memory is 16.1GB. [2022-07-13 17:05:35,179 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 86.0MB. Free memory is still 63.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 17:05:35,180 INFO L158 Benchmark]: CACSL2BoogieTranslator took 208.20ms. Allocated memory was 86.0MB in the beginning and 109.1MB in the end (delta: 23.1MB). Free memory was 47.2MB in the beginning and 87.2MB in the end (delta: -40.0MB). Peak memory consumption was 12.4MB. Max. memory is 16.1GB. [2022-07-13 17:05:35,180 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.93ms. Allocated memory is still 109.1MB. Free memory was 87.2MB in the beginning and 85.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 17:05:35,180 INFO L158 Benchmark]: Boogie Preprocessor took 26.81ms. Allocated memory is still 109.1MB. Free memory was 85.7MB in the beginning and 84.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 17:05:35,180 INFO L158 Benchmark]: RCFGBuilder took 232.09ms. Allocated memory is still 109.1MB. Free memory was 84.6MB in the beginning and 75.0MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-13 17:05:35,181 INFO L158 Benchmark]: TraceAbstraction took 130708.31ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 74.2MB in the beginning and 77.9MB in the end (delta: -3.7MB). Peak memory consumption was 64.6MB. Max. memory is 16.1GB. [2022-07-13 17:05:35,181 INFO L158 Benchmark]: Witness Printer took 28.07ms. Allocated memory is still 132.1MB. Free memory was 77.9MB in the beginning and 74.7MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-13 17:05:35,182 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 86.0MB. Free memory is still 63.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 208.20ms. Allocated memory was 86.0MB in the beginning and 109.1MB in the end (delta: 23.1MB). Free memory was 47.2MB in the beginning and 87.2MB in the end (delta: -40.0MB). Peak memory consumption was 12.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.93ms. Allocated memory is still 109.1MB. Free memory was 87.2MB in the beginning and 85.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 26.81ms. Allocated memory is still 109.1MB. Free memory was 85.7MB in the beginning and 84.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 232.09ms. Allocated memory is still 109.1MB. Free memory was 84.6MB in the beginning and 75.0MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 130708.31ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 74.2MB in the beginning and 77.9MB in the end (delta: -3.7MB). Peak memory consumption was 64.6MB. Max. memory is 16.1GB. * Witness Printer took 28.07ms. Allocated memory is still 132.1MB. Free memory was 77.9MB in the beginning and 74.7MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 130.6s, OverallIterations: 9, TraceHistogramMax: 5, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 42.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 4.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 235 SdHoareTripleChecker+Valid, 30.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 224 mSDsluCounter, 1047 SdHoareTripleChecker+Invalid, 30.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 856 mSDsCounter, 163 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2180 IncrementalHoareTripleChecker+Invalid, 2345 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 163 mSolverCounterUnsat, 191 mSDtfsCounter, 2180 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 588 GetRequests, 417 SyntacticMatches, 11 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 38.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=103occurred in iteration=8, InterpolantAutomatonStates: 113, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 33 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 34 PreInvPairs, 70 NumberOfFragments, 101 HoareAnnotationTreeSize, 34 FomulaSimplifications, 375 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 9 FomulaSimplificationsInter, 3367 FormulaSimplificationTreeSizeReductionInter, 4.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 80.3s InterpolantComputationTime, 363 NumberOfCodeBlocks, 363 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 524 ConstructedInterpolants, 0 QuantifiedInterpolants, 5188 SizeOfPredicates, 33 NumberOfNonLiveVariables, 884 ConjunctsInSsa, 211 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 308/471 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((b <= 20 && 0 <= y) && 1 <= b) && z + x * y == a * b) && a <= 20) && 0 <= a - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-07-13 17:05:35,226 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 Result: TRUE