./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound20.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/fermat1-ll_unwindbound20.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 2dec1b2e3c1461164aa09bac8cca047a14ba0fda75d53737804411255b62653a --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 16:28:17,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 16:28:17,839 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 16:28:17,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 16:28:17,863 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 16:28:17,864 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 16:28:17,865 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 16:28:17,866 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 16:28:17,868 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 16:28:17,868 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 16:28:17,869 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 16:28:17,870 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 16:28:17,870 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 16:28:17,871 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 16:28:17,872 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 16:28:17,873 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 16:28:17,874 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 16:28:17,875 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 16:28:17,876 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 16:28:17,877 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 16:28:17,878 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 16:28:17,880 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 16:28:17,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 16:28:17,882 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 16:28:17,883 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 16:28:17,886 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 16:28:17,890 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 16:28:17,891 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 16:28:17,892 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 16:28:17,892 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 16:28:17,893 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 16:28:17,893 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 16:28:17,895 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 16:28:17,895 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 16:28:17,896 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 16:28:17,897 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 16:28:17,898 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 16:28:17,898 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 16:28:17,898 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 16:28:17,899 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 16:28:17,899 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 16:28:17,901 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 16:28:17,902 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 16:28:17,932 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 16:28:17,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 16:28:17,934 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 16:28:17,934 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 16:28:17,934 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 16:28:17,934 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 16:28:17,935 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 16:28:17,935 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 16:28:17,936 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 16:28:17,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 16:28:17,937 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 16:28:17,937 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 16:28:17,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 16:28:17,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 16:28:17,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 16:28:17,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 16:28:17,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 16:28:17,938 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 16:28:17,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 16:28:17,939 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 16:28:17,940 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 16:28:17,943 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 16:28:17,944 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 16:28:17,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 16:28:17,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 16:28:17,944 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 16:28:17,944 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 16:28:17,945 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 16:28:17,945 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 16:28:17,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 16:28:17,945 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 16:28:17,945 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 16:28:17,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 16:28:17,946 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2dec1b2e3c1461164aa09bac8cca047a14ba0fda75d53737804411255b62653a [2022-07-13 16:28:18,155 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 16:28:18,175 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 16:28:18,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 16:28:18,178 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 16:28:18,178 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 16:28:18,179 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound20.c [2022-07-13 16:28:18,242 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ac0f999d/79772a8604b8469892e197120fbe3ae1/FLAGf134fddb7 [2022-07-13 16:28:18,642 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 16:28:18,642 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound20.c [2022-07-13 16:28:18,649 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ac0f999d/79772a8604b8469892e197120fbe3ae1/FLAGf134fddb7 [2022-07-13 16:28:18,666 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ac0f999d/79772a8604b8469892e197120fbe3ae1 [2022-07-13 16:28:18,669 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 16:28:18,670 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 16:28:18,687 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 16:28:18,687 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 16:28:18,690 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 16:28:18,690 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 04:28:18" (1/1) ... [2022-07-13 16:28:18,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@156c9ac8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:28:18, skipping insertion in model container [2022-07-13 16:28:18,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 04:28:18" (1/1) ... [2022-07-13 16:28:18,706 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 16:28:18,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 16:28:18,870 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/fermat1-ll_unwindbound20.c[535,548] [2022-07-13 16:28:18,902 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 16:28:18,907 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 16:28:18,915 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/fermat1-ll_unwindbound20.c[535,548] [2022-07-13 16:28:18,923 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 16:28:18,933 INFO L208 MainTranslator]: Completed translation [2022-07-13 16:28:18,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:28:18 WrapperNode [2022-07-13 16:28:18,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 16:28:18,935 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 16:28:18,935 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 16:28:18,935 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 16:28:18,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:28:18" (1/1) ... [2022-07-13 16:28:18,945 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:28:18" (1/1) ... [2022-07-13 16:28:18,958 INFO L137 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-07-13 16:28:18,959 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 16:28:18,959 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 16:28:18,960 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 16:28:18,960 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 16:28:18,966 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:28:18" (1/1) ... [2022-07-13 16:28:18,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:28:18" (1/1) ... [2022-07-13 16:28:18,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:28:18" (1/1) ... [2022-07-13 16:28:18,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:28:18" (1/1) ... [2022-07-13 16:28:18,970 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:28:18" (1/1) ... [2022-07-13 16:28:18,973 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:28:18" (1/1) ... [2022-07-13 16:28:18,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:28:18" (1/1) ... [2022-07-13 16:28:18,975 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 16:28:18,976 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 16:28:18,976 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 16:28:18,976 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 16:28:18,977 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:28:18" (1/1) ... [2022-07-13 16:28:18,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 16:28:19,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:28:19,020 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 16:28:19,034 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 16:28:19,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 16:28:19,059 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-13 16:28:19,059 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-13 16:28:19,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 16:28:19,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 16:28:19,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 16:28:19,060 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-13 16:28:19,060 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-13 16:28:19,105 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 16:28:19,107 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 16:28:19,235 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 16:28:19,240 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 16:28:19,240 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-13 16:28:19,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 04:28:19 BoogieIcfgContainer [2022-07-13 16:28:19,242 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 16:28:19,243 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 16:28:19,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 16:28:19,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 16:28:19,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 04:28:18" (1/3) ... [2022-07-13 16:28:19,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43badc5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 04:28:19, skipping insertion in model container [2022-07-13 16:28:19,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:28:18" (2/3) ... [2022-07-13 16:28:19,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43badc5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 04:28:19, skipping insertion in model container [2022-07-13 16:28:19,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 04:28:19" (3/3) ... [2022-07-13 16:28:19,248 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound20.c [2022-07-13 16:28:19,260 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 16:28:19,261 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 16:28:19,297 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 16:28:19,302 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@53d1d210, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@76a98551 [2022-07-13 16:28:19,303 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 16:28:19,306 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 16:28:19,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-13 16:28:19,312 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:28:19,316 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:28:19,317 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:28:19,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:28:19,327 INFO L85 PathProgramCache]: Analyzing trace with hash 738208203, now seen corresponding path program 1 times [2022-07-13 16:28:19,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:28:19,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230318827] [2022-07-13 16:28:19,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:19,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:28:19,421 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:28:19,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443874808] [2022-07-13 16:28:19,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:19,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:28:19,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:28:19,427 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 16:28:19,438 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 16:28:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:28:19,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-13 16:28:19,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:28:19,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 16:28:19,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:28:19,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:28:19,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230318827] [2022-07-13 16:28:19,558 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:28:19,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443874808] [2022-07-13 16:28:19,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443874808] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:28:19,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:28:19,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 16:28:19,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552763538] [2022-07-13 16:28:19,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:28:19,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 16:28:19,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:28:19,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 16:28:19,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 16:28:19,594 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 16:28:19,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:28:19,613 INFO L93 Difference]: Finished difference Result 61 states and 94 transitions. [2022-07-13 16:28:19,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 16:28:19,615 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-07-13 16:28:19,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:28:19,619 INFO L225 Difference]: With dead ends: 61 [2022-07-13 16:28:19,619 INFO L226 Difference]: Without dead ends: 28 [2022-07-13 16:28:19,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 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 16:28:19,625 INFO L413 NwaCegarLoop]: 41 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, 41 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 16:28:19,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:28:19,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-13 16:28:19,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-07-13 16:28:19,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 16:28:19,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2022-07-13 16:28:19,654 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 18 [2022-07-13 16:28:19,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:28:19,655 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2022-07-13 16:28:19,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 16:28:19,655 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2022-07-13 16:28:19,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-13 16:28:19,657 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:28:19,657 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:28:19,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 16:28:19,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-07-13 16:28:19,880 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:28:19,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:28:19,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1770759922, now seen corresponding path program 1 times [2022-07-13 16:28:19,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:28:19,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928746648] [2022-07-13 16:28:19,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:19,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:28:19,894 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:28:19,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602565686] [2022-07-13 16:28:19,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:19,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:28:19,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:28:19,897 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 16:28:19,898 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 16:28:19,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:28:19,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 16:28:19,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:28:20,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 16:28:20,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:28:20,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:28:20,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928746648] [2022-07-13 16:28:20,027 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:28:20,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602565686] [2022-07-13 16:28:20,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602565686] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:28:20,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:28:20,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 16:28:20,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65194341] [2022-07-13 16:28:20,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:28:20,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 16:28:20,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:28:20,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 16:28:20,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 16:28:20,036 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 16:28:20,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:28:20,069 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-07-13 16:28:20,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 16:28:20,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-07-13 16:28:20,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:28:20,075 INFO L225 Difference]: With dead ends: 37 [2022-07-13 16:28:20,075 INFO L226 Difference]: Without dead ends: 30 [2022-07-13 16:28:20,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 16:28:20,078 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:28:20,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:28:20,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-13 16:28:20,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-07-13 16:28:20,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 16:28:20,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-07-13 16:28:20,090 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 19 [2022-07-13 16:28:20,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:28:20,092 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-07-13 16:28:20,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 16:28:20,092 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-07-13 16:28:20,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-13 16:28:20,093 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:28:20,093 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:28:20,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-13 16:28:20,293 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,SelfDestructingSolverStorable1 [2022-07-13 16:28:20,294 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:28:20,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:28:20,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1769091626, now seen corresponding path program 1 times [2022-07-13 16:28:20,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:28:20,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99767414] [2022-07-13 16:28:20,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:20,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:28:20,309 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:28:20,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1754199253] [2022-07-13 16:28:20,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:20,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:28:20,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:28:20,315 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 16:28:20,317 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 16:28:20,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:28:20,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 16:28:20,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:28:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 16:28:20,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:28:20,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:28:20,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99767414] [2022-07-13 16:28:20,588 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:28:20,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754199253] [2022-07-13 16:28:20,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754199253] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:28:20,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:28:20,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 16:28:20,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647510301] [2022-07-13 16:28:20,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:28:20,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 16:28:20,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:28:20,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 16:28:20,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 16:28:20,591 INFO L87 Difference]: Start difference. First operand 30 states and 39 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 16:28:22,078 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:28:24,274 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:28:27,248 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:28:27,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:28:27,283 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2022-07-13 16:28:27,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 16:28:27,284 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-07-13 16:28:27,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:28:27,284 INFO L225 Difference]: With dead ends: 49 [2022-07-13 16:28:27,285 INFO L226 Difference]: Without dead ends: 47 [2022-07-13 16:28:27,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 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 16:28:27,286 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-07-13 16:28:27,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 100 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-07-13 16:28:27,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-13 16:28:27,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-07-13 16:28:27,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.393939393939394) internal successors, (46), 34 states have internal predecessors, (46), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-13 16:28:27,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2022-07-13 16:28:27,296 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 19 [2022-07-13 16:28:27,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:28:27,297 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2022-07-13 16:28:27,297 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 16:28:27,297 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2022-07-13 16:28:27,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-13 16:28:27,298 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:28:27,298 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:28:27,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-13 16:28:27,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:28:27,504 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:28:27,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:28:27,504 INFO L85 PathProgramCache]: Analyzing trace with hash -82041861, now seen corresponding path program 1 times [2022-07-13 16:28:27,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:28:27,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875083669] [2022-07-13 16:28:27,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:27,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:28:27,514 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:28:27,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [440448620] [2022-07-13 16:28:27,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:27,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:28:27,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:28:27,516 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 16:28:27,518 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 16:28:27,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:28:27,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 16:28:27,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:28:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 16:28:27,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:28:27,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 16:28:27,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:28:27,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875083669] [2022-07-13 16:28:27,799 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:28:27,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440448620] [2022-07-13 16:28:27,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440448620] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:28:27,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:28:27,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-07-13 16:28:27,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731452508] [2022-07-13 16:28:27,801 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:28:27,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 16:28:27,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:28:27,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 16:28:27,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-13 16:28:27,804 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 16:28:28,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:28:28,016 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2022-07-13 16:28:28,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 16:28:28,017 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2022-07-13 16:28:28,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:28:28,018 INFO L225 Difference]: With dead ends: 53 [2022-07-13 16:28:28,018 INFO L226 Difference]: Without dead ends: 48 [2022-07-13 16:28:28,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-07-13 16:28:28,020 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 16:28:28,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 139 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 16:28:28,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-13 16:28:28,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 32. [2022-07-13 16:28:28,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 16:28:28,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-07-13 16:28:28,034 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 25 [2022-07-13 16:28:28,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:28:28,034 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-07-13 16:28:28,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 16:28:28,035 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-07-13 16:28:28,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-13 16:28:28,036 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:28:28,037 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:28:28,066 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 16:28:28,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:28:28,251 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:28:28,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:28:28,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1145481658, now seen corresponding path program 1 times [2022-07-13 16:28:28,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:28:28,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856692936] [2022-07-13 16:28:28,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:28,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:28:28,261 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:28:28,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395560395] [2022-07-13 16:28:28,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:28,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:28:28,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:28:28,266 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 16:28:28,267 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 16:28:28,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:28:28,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 16:28:28,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:28:28,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 16:28:28,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:28:28,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:28:28,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856692936] [2022-07-13 16:28:28,359 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:28:28,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395560395] [2022-07-13 16:28:28,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395560395] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:28:28,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:28:28,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 16:28:28,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790084017] [2022-07-13 16:28:28,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:28:28,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 16:28:28,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:28:28,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 16:28:28,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 16:28:28,361 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 16:28:28,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:28:28,389 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-07-13 16:28:28,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 16:28:28,389 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-07-13 16:28:28,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:28:28,390 INFO L225 Difference]: With dead ends: 61 [2022-07-13 16:28:28,390 INFO L226 Difference]: Without dead ends: 40 [2022-07-13 16:28:28,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 16:28:28,392 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:28:28,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 93 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:28:28,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-13 16:28:28,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-07-13 16:28:28,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 16:28:28,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2022-07-13 16:28:28,401 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 31 [2022-07-13 16:28:28,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:28:28,402 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2022-07-13 16:28:28,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 16:28:28,402 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2022-07-13 16:28:28,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-13 16:28:28,403 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:28:28,403 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:28:28,427 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 16:28:28,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:28:28,617 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:28:28,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:28:28,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1102972225, now seen corresponding path program 1 times [2022-07-13 16:28:28,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:28:28,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277745782] [2022-07-13 16:28:28,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:28,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:28:28,626 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:28:28,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [963568312] [2022-07-13 16:28:28,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:28,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:28:28,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:28:28,635 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 16:28:28,636 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 16:28:28,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:28:28,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 16:28:28,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:28:28,739 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 16:28:28,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:28:28,800 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 16:28:28,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:28:28,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277745782] [2022-07-13 16:28:28,802 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:28:28,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963568312] [2022-07-13 16:28:28,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963568312] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 16:28:28,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 16:28:28,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2022-07-13 16:28:28,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923473409] [2022-07-13 16:28:28,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:28:28,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 16:28:28,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:28:28,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 16:28:28,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-13 16:28:28,805 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-13 16:28:28,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:28:28,844 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2022-07-13 16:28:28,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 16:28:28,846 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2022-07-13 16:28:28,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:28:28,850 INFO L225 Difference]: With dead ends: 70 [2022-07-13 16:28:28,850 INFO L226 Difference]: Without dead ends: 49 [2022-07-13 16:28:28,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-13 16:28:28,853 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 29 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:28:28,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 99 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:28:28,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-13 16:28:28,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-07-13 16:28:28,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-13 16:28:28,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-07-13 16:28:28,870 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 37 [2022-07-13 16:28:28,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:28:28,871 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-07-13 16:28:28,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-13 16:28:28,871 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-07-13 16:28:28,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-13 16:28:28,872 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:28:28,872 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:28:28,891 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 16:28:29,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:28:29,084 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:28:29,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:28:29,084 INFO L85 PathProgramCache]: Analyzing trace with hash 30895492, now seen corresponding path program 1 times [2022-07-13 16:28:29,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:28:29,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578598785] [2022-07-13 16:28:29,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:29,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:28:29,091 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:28:29,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1481424850] [2022-07-13 16:28:29,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:29,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:28:29,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:28:29,093 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 16:28:29,094 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 16:28:29,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:28:29,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 16:28:29,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:28:29,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 16:28:29,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:28:29,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 16:28:29,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:28:29,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578598785] [2022-07-13 16:28:29,233 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:28:29,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481424850] [2022-07-13 16:28:29,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481424850] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:28:29,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:28:29,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-07-13 16:28:29,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813475228] [2022-07-13 16:28:29,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:28:29,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 16:28:29,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:28:29,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 16:28:29,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-13 16:28:29,235 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-13 16:28:29,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:28:29,370 INFO L93 Difference]: Finished difference Result 125 states and 156 transitions. [2022-07-13 16:28:29,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 16:28:29,370 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 39 [2022-07-13 16:28:29,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:28:29,372 INFO L225 Difference]: With dead ends: 125 [2022-07-13 16:28:29,372 INFO L226 Difference]: Without dead ends: 104 [2022-07-13 16:28:29,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-07-13 16:28:29,373 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 90 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 16:28:29,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 165 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 16:28:29,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-13 16:28:29,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2022-07-13 16:28:29,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 68 states have internal predecessors, (82), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-13 16:28:29,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2022-07-13 16:28:29,390 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 39 [2022-07-13 16:28:29,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:28:29,390 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2022-07-13 16:28:29,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-13 16:28:29,390 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2022-07-13 16:28:29,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-13 16:28:29,391 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:28:29,392 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:28:29,417 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 16:28:29,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:28:29,606 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:28:29,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:28:29,606 INFO L85 PathProgramCache]: Analyzing trace with hash -798356602, now seen corresponding path program 1 times [2022-07-13 16:28:29,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:28:29,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203959089] [2022-07-13 16:28:29,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:29,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:28:29,615 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:28:29,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315066660] [2022-07-13 16:28:29,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:29,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:28:29,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:28:29,617 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 16:28:29,644 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 16:28:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:28:29,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 16:28:29,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:28:29,708 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 16:28:29,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:28:29,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:28:29,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203959089] [2022-07-13 16:28:29,709 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:28:29,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315066660] [2022-07-13 16:28:29,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315066660] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:28:29,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:28:29,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 16:28:29,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855408152] [2022-07-13 16:28:29,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:28:29,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 16:28:29,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:28:29,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 16:28:29,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 16:28:29,713 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-13 16:28:29,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:28:29,757 INFO L93 Difference]: Finished difference Result 154 states and 198 transitions. [2022-07-13 16:28:29,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 16:28:29,758 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 43 [2022-07-13 16:28:29,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:28:29,761 INFO L225 Difference]: With dead ends: 154 [2022-07-13 16:28:29,761 INFO L226 Difference]: Without dead ends: 115 [2022-07-13 16:28:29,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 16:28:29,763 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 23 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:28:29,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 86 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:28:29,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-13 16:28:29,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2022-07-13 16:28:29,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 79 states have internal predecessors, (96), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-13 16:28:29,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 133 transitions. [2022-07-13 16:28:29,794 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 133 transitions. Word has length 43 [2022-07-13 16:28:29,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:28:29,795 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 133 transitions. [2022-07-13 16:28:29,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-13 16:28:29,795 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 133 transitions. [2022-07-13 16:28:29,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-13 16:28:29,796 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:28:29,796 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:28:29,825 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 16:28:29,996 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,SelfDestructingSolverStorable7 [2022-07-13 16:28:29,996 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:28:29,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:28:29,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1023958197, now seen corresponding path program 1 times [2022-07-13 16:28:29,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:28:29,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012993259] [2022-07-13 16:28:29,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:29,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:28:30,005 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:28:30,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1199304149] [2022-07-13 16:28:30,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:30,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:28:30,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:28:30,012 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:28:30,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 16:28:30,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:28:30,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 16:28:30,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:28:30,123 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 16:28:30,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:28:30,196 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 16:28:30,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:28:30,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012993259] [2022-07-13 16:28:30,196 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:28:30,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199304149] [2022-07-13 16:28:30,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199304149] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:28:30,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:28:30,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2022-07-13 16:28:30,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447424774] [2022-07-13 16:28:30,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:28:30,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 16:28:30,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:28:30,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 16:28:30,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-07-13 16:28:30,198 INFO L87 Difference]: Start difference. First operand 105 states and 133 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-07-13 16:28:30,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:28:30,381 INFO L93 Difference]: Finished difference Result 215 states and 279 transitions. [2022-07-13 16:28:30,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 16:28:30,382 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 45 [2022-07-13 16:28:30,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:28:30,383 INFO L225 Difference]: With dead ends: 215 [2022-07-13 16:28:30,383 INFO L226 Difference]: Without dead ends: 168 [2022-07-13 16:28:30,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-07-13 16:28:30,384 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 140 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 16:28:30,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 199 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 16:28:30,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-13 16:28:30,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 149. [2022-07-13 16:28:30,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 111 states have (on average 1.2432432432432432) internal successors, (138), 112 states have internal predecessors, (138), 28 states have call successors, (28), 10 states have call predecessors, (28), 9 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-07-13 16:28:30,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 193 transitions. [2022-07-13 16:28:30,405 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 193 transitions. Word has length 45 [2022-07-13 16:28:30,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:28:30,405 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 193 transitions. [2022-07-13 16:28:30,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-07-13 16:28:30,405 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 193 transitions. [2022-07-13 16:28:30,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-13 16:28:30,406 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:28:30,407 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:28:30,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 16:28:30,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:28:30,634 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:28:30,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:28:30,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1104536814, now seen corresponding path program 1 times [2022-07-13 16:28:30,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:28:30,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080831464] [2022-07-13 16:28:30,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:30,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:28:30,652 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:28:30,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1384009766] [2022-07-13 16:28:30,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:30,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:28:30,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:28:30,654 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:28:30,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 16:28:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:28:30,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 16:28:30,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:28:30,793 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 16:28:30,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:28:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-13 16:28:30,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:28:30,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080831464] [2022-07-13 16:28:30,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:28:30,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384009766] [2022-07-13 16:28:30,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384009766] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:28:30,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:28:30,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-07-13 16:28:30,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655762488] [2022-07-13 16:28:30,901 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:28:30,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 16:28:30,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:28:30,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 16:28:30,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-13 16:28:30,903 INFO L87 Difference]: Start difference. First operand 149 states and 193 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-07-13 16:28:31,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:28:31,165 INFO L93 Difference]: Finished difference Result 207 states and 274 transitions. [2022-07-13 16:28:31,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 16:28:31,166 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 51 [2022-07-13 16:28:31,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:28:31,169 INFO L225 Difference]: With dead ends: 207 [2022-07-13 16:28:31,169 INFO L226 Difference]: Without dead ends: 202 [2022-07-13 16:28:31,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2022-07-13 16:28:31,170 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 242 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 16:28:31,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 276 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 16:28:31,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-07-13 16:28:31,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2022-07-13 16:28:31,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 144 states have (on average 1.2361111111111112) internal successors, (178), 148 states have internal predecessors, (178), 38 states have call successors, (38), 12 states have call predecessors, (38), 11 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2022-07-13 16:28:31,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 253 transitions. [2022-07-13 16:28:31,200 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 253 transitions. Word has length 51 [2022-07-13 16:28:31,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:28:31,202 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 253 transitions. [2022-07-13 16:28:31,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-07-13 16:28:31,202 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 253 transitions. [2022-07-13 16:28:31,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-13 16:28:31,208 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:28:31,208 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:28:31,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 16:28:31,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-13 16:28:31,421 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:28:31,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:28:31,421 INFO L85 PathProgramCache]: Analyzing trace with hash 540498080, now seen corresponding path program 1 times [2022-07-13 16:28:31,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:28:31,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032232363] [2022-07-13 16:28:31,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:31,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:28:31,430 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:28:31,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [924085438] [2022-07-13 16:28:31,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:31,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:28:31,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:28:31,432 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:28:31,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 16:28:31,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:28:31,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 16:28:31,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:28:31,534 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 64 proven. 12 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-07-13 16:28:31,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:28:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-07-13 16:28:31,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:28:31,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032232363] [2022-07-13 16:28:31,593 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:28:31,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924085438] [2022-07-13 16:28:31,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924085438] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:28:31,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:28:31,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-07-13 16:28:31,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10381745] [2022-07-13 16:28:31,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:28:31,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 16:28:31,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:28:31,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 16:28:31,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 16:28:31,596 INFO L87 Difference]: Start difference. First operand 194 states and 253 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-13 16:28:31,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:28:31,678 INFO L93 Difference]: Finished difference Result 498 states and 693 transitions. [2022-07-13 16:28:31,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 16:28:31,678 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 87 [2022-07-13 16:28:31,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:28:31,681 INFO L225 Difference]: With dead ends: 498 [2022-07-13 16:28:31,681 INFO L226 Difference]: Without dead ends: 355 [2022-07-13 16:28:31,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 16:28:31,682 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 16 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:28:31,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 130 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:28:31,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-07-13 16:28:31,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 338. [2022-07-13 16:28:31,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 254 states have (on average 1.2677165354330708) internal successors, (322), 260 states have internal predecessors, (322), 72 states have call successors, (72), 12 states have call predecessors, (72), 11 states have return successors, (71), 65 states have call predecessors, (71), 71 states have call successors, (71) [2022-07-13 16:28:31,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 465 transitions. [2022-07-13 16:28:31,723 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 465 transitions. Word has length 87 [2022-07-13 16:28:31,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:28:31,724 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 465 transitions. [2022-07-13 16:28:31,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-13 16:28:31,724 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 465 transitions. [2022-07-13 16:28:31,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-13 16:28:31,726 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:28:31,726 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:28:31,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 16:28:31,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-13 16:28:31,947 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:28:31,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:28:31,948 INFO L85 PathProgramCache]: Analyzing trace with hash -134976430, now seen corresponding path program 2 times [2022-07-13 16:28:31,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:28:31,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457312139] [2022-07-13 16:28:31,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:31,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:28:31,959 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:28:31,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301093189] [2022-07-13 16:28:31,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 16:28:31,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:28:31,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:28:31,963 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:28:31,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 16:28:32,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 16:28:32,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 16:28:32,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-13 16:28:32,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:28:32,139 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 58 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 16:28:32,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:28:32,311 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-07-13 16:28:32,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:28:32,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457312139] [2022-07-13 16:28:32,312 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:28:32,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301093189] [2022-07-13 16:28:32,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301093189] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:28:32,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:28:32,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2022-07-13 16:28:32,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274740141] [2022-07-13 16:28:32,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:28:32,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 16:28:32,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:28:32,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 16:28:32,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-07-13 16:28:32,315 INFO L87 Difference]: Start difference. First operand 338 states and 465 transitions. Second operand has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 17 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) [2022-07-13 16:28:32,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:28:32,870 INFO L93 Difference]: Finished difference Result 981 states and 1419 transitions. [2022-07-13 16:28:32,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-13 16:28:32,871 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 17 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) Word has length 87 [2022-07-13 16:28:32,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:28:32,875 INFO L225 Difference]: With dead ends: 981 [2022-07-13 16:28:32,875 INFO L226 Difference]: Without dead ends: 838 [2022-07-13 16:28:32,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=403, Invalid=719, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 16:28:32,877 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 414 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 16:28:32,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 424 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 16:28:32,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-07-13 16:28:32,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 789. [2022-07-13 16:28:32,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 596 states have (on average 1.2684563758389262) internal successors, (756), 605 states have internal predecessors, (756), 175 states have call successors, (175), 18 states have call predecessors, (175), 17 states have return successors, (174), 165 states have call predecessors, (174), 174 states have call successors, (174) [2022-07-13 16:28:32,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1105 transitions. [2022-07-13 16:28:32,974 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1105 transitions. Word has length 87 [2022-07-13 16:28:32,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:28:32,975 INFO L495 AbstractCegarLoop]: Abstraction has 789 states and 1105 transitions. [2022-07-13 16:28:32,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 17 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) [2022-07-13 16:28:32,975 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1105 transitions. [2022-07-13 16:28:32,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-13 16:28:32,977 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:28:32,977 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:28:33,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 16:28:33,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-13 16:28:33,200 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:28:33,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:28:33,201 INFO L85 PathProgramCache]: Analyzing trace with hash 2132027339, now seen corresponding path program 1 times [2022-07-13 16:28:33,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:28:33,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369409847] [2022-07-13 16:28:33,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:33,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:28:33,212 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:28:33,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714218610] [2022-07-13 16:28:33,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:33,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:28:33,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:28:33,214 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:28:33,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 16:28:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:28:33,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-13 16:28:33,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:28:33,437 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 16:28:33,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:28:33,656 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-07-13 16:28:33,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:28:33,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369409847] [2022-07-13 16:28:33,657 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:28:33,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714218610] [2022-07-13 16:28:33,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714218610] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:28:33,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:28:33,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2022-07-13 16:28:33,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423877555] [2022-07-13 16:28:33,658 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:28:33,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-13 16:28:33,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:28:33,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-13 16:28:33,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-07-13 16:28:33,660 INFO L87 Difference]: Start difference. First operand 789 states and 1105 transitions. Second operand has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-07-13 16:28:34,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:28:34,358 INFO L93 Difference]: Finished difference Result 1281 states and 1795 transitions. [2022-07-13 16:28:34,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-13 16:28:34,361 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 93 [2022-07-13 16:28:34,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:28:34,364 INFO L225 Difference]: With dead ends: 1281 [2022-07-13 16:28:34,364 INFO L226 Difference]: Without dead ends: 791 [2022-07-13 16:28:34,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=1056, Unknown=0, NotChecked=0, Total=1640 [2022-07-13 16:28:34,366 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 405 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 16:28:34,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 442 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 16:28:34,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-07-13 16:28:34,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 736. [2022-07-13 16:28:34,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 552 states have (on average 1.2210144927536233) internal successors, (674), 556 states have internal predecessors, (674), 162 states have call successors, (162), 22 states have call predecessors, (162), 21 states have return successors, (161), 157 states have call predecessors, (161), 161 states have call successors, (161) [2022-07-13 16:28:34,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 997 transitions. [2022-07-13 16:28:34,456 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 997 transitions. Word has length 93 [2022-07-13 16:28:34,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:28:34,456 INFO L495 AbstractCegarLoop]: Abstraction has 736 states and 997 transitions. [2022-07-13 16:28:34,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-07-13 16:28:34,457 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 997 transitions. [2022-07-13 16:28:34,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-13 16:28:34,458 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:28:34,459 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:28:34,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 16:28:34,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-13 16:28:34,675 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:28:34,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:28:34,676 INFO L85 PathProgramCache]: Analyzing trace with hash 519126930, now seen corresponding path program 1 times [2022-07-13 16:28:34,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:28:34,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611521513] [2022-07-13 16:28:34,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:34,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:28:34,685 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:28:34,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941114927] [2022-07-13 16:28:34,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:34,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:28:34,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:28:34,688 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:28:34,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 16:28:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:28:34,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-13 16:28:34,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:28:34,911 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 236 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 16:28:34,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:28:35,127 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 56 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-07-13 16:28:35,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:28:35,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611521513] [2022-07-13 16:28:35,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:28:35,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941114927] [2022-07-13 16:28:35,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941114927] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:28:35,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:28:35,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2022-07-13 16:28:35,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495716551] [2022-07-13 16:28:35,128 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:28:35,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-13 16:28:35,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:28:35,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-13 16:28:35,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-07-13 16:28:35,130 INFO L87 Difference]: Start difference. First operand 736 states and 997 transitions. Second operand has 24 states, 24 states have (on average 4.666666666666667) internal successors, (112), 24 states have internal predecessors, (112), 21 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) [2022-07-13 16:28:35,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:28:35,783 INFO L93 Difference]: Finished difference Result 753 states and 1015 transitions. [2022-07-13 16:28:35,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-13 16:28:35,784 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.666666666666667) internal successors, (112), 24 states have internal predecessors, (112), 21 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) Word has length 99 [2022-07-13 16:28:35,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:28:35,787 INFO L225 Difference]: With dead ends: 753 [2022-07-13 16:28:35,787 INFO L226 Difference]: Without dead ends: 748 [2022-07-13 16:28:35,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=551, Invalid=1009, Unknown=0, NotChecked=0, Total=1560 [2022-07-13 16:28:35,789 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 537 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 16:28:35,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 400 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 16:28:35,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-07-13 16:28:35,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 742. [2022-07-13 16:28:35,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 558 states have (on average 1.1863799283154122) internal successors, (662), 560 states have internal predecessors, (662), 162 states have call successors, (162), 22 states have call predecessors, (162), 21 states have return successors, (161), 159 states have call predecessors, (161), 161 states have call successors, (161) [2022-07-13 16:28:35,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 985 transitions. [2022-07-13 16:28:35,861 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 985 transitions. Word has length 99 [2022-07-13 16:28:35,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:28:35,862 INFO L495 AbstractCegarLoop]: Abstraction has 742 states and 985 transitions. [2022-07-13 16:28:35,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.666666666666667) internal successors, (112), 24 states have internal predecessors, (112), 21 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) [2022-07-13 16:28:35,862 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 985 transitions. [2022-07-13 16:28:35,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-07-13 16:28:35,866 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:28:35,866 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 10, 8, 8, 8, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:28:35,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 16:28:36,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:28:36,075 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:28:36,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:28:36,076 INFO L85 PathProgramCache]: Analyzing trace with hash 682851631, now seen corresponding path program 3 times [2022-07-13 16:28:36,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:28:36,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193466647] [2022-07-13 16:28:36,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:36,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:28:36,085 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:28:36,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [430863427] [2022-07-13 16:28:36,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 16:28:36,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:28:36,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:28:36,087 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:28:36,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 16:28:36,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-13 16:28:36,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 16:28:36,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 16:28:36,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:28:36,176 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2022-07-13 16:28:36,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:28:36,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:28:36,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193466647] [2022-07-13 16:28:36,177 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:28:36,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430863427] [2022-07-13 16:28:36,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430863427] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:28:36,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:28:36,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 16:28:36,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333816418] [2022-07-13 16:28:36,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:28:36,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 16:28:36,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:28:36,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 16:28:36,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 16:28:36,179 INFO L87 Difference]: Start difference. First operand 742 states and 985 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-13 16:28:36,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:28:36,263 INFO L93 Difference]: Finished difference Result 932 states and 1247 transitions. [2022-07-13 16:28:36,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 16:28:36,264 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 169 [2022-07-13 16:28:36,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:28:36,267 INFO L225 Difference]: With dead ends: 932 [2022-07-13 16:28:36,267 INFO L226 Difference]: Without dead ends: 803 [2022-07-13 16:28:36,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-13 16:28:36,270 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:28:36,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 142 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:28:36,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-07-13 16:28:36,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 768. [2022-07-13 16:28:36,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 579 states have (on average 1.1744386873920554) internal successors, (680), 581 states have internal predecessors, (680), 164 states have call successors, (164), 25 states have call predecessors, (164), 24 states have return successors, (163), 161 states have call predecessors, (163), 163 states have call successors, (163) [2022-07-13 16:28:36,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1007 transitions. [2022-07-13 16:28:36,344 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1007 transitions. Word has length 169 [2022-07-13 16:28:36,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:28:36,344 INFO L495 AbstractCegarLoop]: Abstraction has 768 states and 1007 transitions. [2022-07-13 16:28:36,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-13 16:28:36,344 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1007 transitions. [2022-07-13 16:28:36,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-07-13 16:28:36,348 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:28:36,349 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 9, 8, 8, 8, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:28:36,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-13 16:28:36,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-13 16:28:36,567 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:28:36,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:28:36,568 INFO L85 PathProgramCache]: Analyzing trace with hash 356922161, now seen corresponding path program 1 times [2022-07-13 16:28:36,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:28:36,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484683774] [2022-07-13 16:28:36,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:36,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:28:36,577 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:28:36,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [642609633] [2022-07-13 16:28:36,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:36,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:28:36,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:28:36,581 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:28:36,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-13 16:28:36,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:28:36,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 16:28:36,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:28:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 546 proven. 0 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2022-07-13 16:28:36,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:28:36,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:28:36,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484683774] [2022-07-13 16:28:36,673 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:28:36,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642609633] [2022-07-13 16:28:36,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642609633] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:28:36,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:28:36,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 16:28:36,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998174066] [2022-07-13 16:28:36,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:28:36,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 16:28:36,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:28:36,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 16:28:36,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 16:28:36,675 INFO L87 Difference]: Start difference. First operand 768 states and 1007 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-13 16:28:36,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:28:36,766 INFO L93 Difference]: Finished difference Result 1294 states and 1697 transitions. [2022-07-13 16:28:36,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 16:28:36,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 173 [2022-07-13 16:28:36,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:28:36,770 INFO L225 Difference]: With dead ends: 1294 [2022-07-13 16:28:36,770 INFO L226 Difference]: Without dead ends: 814 [2022-07-13 16:28:36,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 16:28:36,772 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 3 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:28:36,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 74 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:28:36,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-07-13 16:28:36,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 765. [2022-07-13 16:28:36,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 579 states have (on average 1.1709844559585492) internal successors, (678), 582 states have internal predecessors, (678), 161 states have call successors, (161), 25 states have call predecessors, (161), 24 states have return successors, (160), 157 states have call predecessors, (160), 160 states have call successors, (160) [2022-07-13 16:28:36,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 999 transitions. [2022-07-13 16:28:36,846 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 999 transitions. Word has length 173 [2022-07-13 16:28:36,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:28:36,846 INFO L495 AbstractCegarLoop]: Abstraction has 765 states and 999 transitions. [2022-07-13 16:28:36,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-13 16:28:36,846 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 999 transitions. [2022-07-13 16:28:36,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-07-13 16:28:36,849 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:28:36,850 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 8, 8, 8, 8, 8, 7, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:28:36,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-13 16:28:37,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-13 16:28:37,075 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:28:37,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:28:37,076 INFO L85 PathProgramCache]: Analyzing trace with hash 45613149, now seen corresponding path program 2 times [2022-07-13 16:28:37,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:28:37,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432374186] [2022-07-13 16:28:37,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:37,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:28:37,085 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:28:37,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1028423558] [2022-07-13 16:28:37,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 16:28:37,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:28:37,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:28:37,087 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:28:37,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-13 16:28:37,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 16:28:37,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 16:28:37,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-13 16:28:37,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:28:37,498 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 226 proven. 726 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 16:28:37,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:28:37,687 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 94 proven. 182 refuted. 0 times theorem prover too weak. 692 trivial. 0 not checked. [2022-07-13 16:28:37,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:28:37,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432374186] [2022-07-13 16:28:37,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:28:37,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028423558] [2022-07-13 16:28:37,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028423558] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:28:37,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:28:37,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 24 [2022-07-13 16:28:37,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597309711] [2022-07-13 16:28:37,688 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:28:37,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-13 16:28:37,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:28:37,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-13 16:28:37,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-07-13 16:28:37,690 INFO L87 Difference]: Start difference. First operand 765 states and 999 transitions. Second operand has 24 states, 24 states have (on average 7.541666666666667) internal successors, (181), 24 states have internal predecessors, (181), 21 states have call successors, (41), 20 states have call predecessors, (41), 20 states have return successors, (40), 21 states have call predecessors, (40), 21 states have call successors, (40) [2022-07-13 16:28:38,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:28:38,313 INFO L93 Difference]: Finished difference Result 797 states and 1039 transitions. [2022-07-13 16:28:38,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-13 16:28:38,314 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 7.541666666666667) internal successors, (181), 24 states have internal predecessors, (181), 21 states have call successors, (41), 20 states have call predecessors, (41), 20 states have return successors, (40), 21 states have call predecessors, (40), 21 states have call successors, (40) Word has length 173 [2022-07-13 16:28:38,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:28:38,317 INFO L225 Difference]: With dead ends: 797 [2022-07-13 16:28:38,317 INFO L226 Difference]: Without dead ends: 748 [2022-07-13 16:28:38,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 321 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=631, Invalid=1091, Unknown=0, NotChecked=0, Total=1722 [2022-07-13 16:28:38,318 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 345 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 16:28:38,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 481 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 16:28:38,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-07-13 16:28:38,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 744. [2022-07-13 16:28:38,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 565 states have (on average 1.1610619469026549) internal successors, (656), 565 states have internal predecessors, (656), 156 states have call successors, (156), 23 states have call predecessors, (156), 22 states have return successors, (155), 155 states have call predecessors, (155), 155 states have call successors, (155) [2022-07-13 16:28:38,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 967 transitions. [2022-07-13 16:28:38,393 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 967 transitions. Word has length 173 [2022-07-13 16:28:38,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:28:38,393 INFO L495 AbstractCegarLoop]: Abstraction has 744 states and 967 transitions. [2022-07-13 16:28:38,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.541666666666667) internal successors, (181), 24 states have internal predecessors, (181), 21 states have call successors, (41), 20 states have call predecessors, (41), 20 states have return successors, (40), 21 states have call predecessors, (40), 21 states have call successors, (40) [2022-07-13 16:28:38,394 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 967 transitions. [2022-07-13 16:28:38,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-13 16:28:38,397 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:28:38,397 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 8, 8, 8, 8, 8, 8, 8, 8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:28:38,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-13 16:28:38,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-13 16:28:38,615 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:28:38,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:28:38,616 INFO L85 PathProgramCache]: Analyzing trace with hash 2005289494, now seen corresponding path program 2 times [2022-07-13 16:28:38,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:28:38,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081710558] [2022-07-13 16:28:38,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:38,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:28:38,632 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:28:38,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1982908975] [2022-07-13 16:28:38,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 16:28:38,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:28:38,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:28:38,634 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:28:38,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-13 16:28:38,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 16:28:38,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 16:28:38,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-13 16:28:38,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:28:41,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1060 backedges. 493 proven. 112 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2022-07-13 16:28:41,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:28:41,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1060 backedges. 189 proven. 92 refuted. 0 times theorem prover too weak. 779 trivial. 0 not checked. [2022-07-13 16:28:41,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:28:41,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081710558] [2022-07-13 16:28:41,949 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:28:41,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982908975] [2022-07-13 16:28:41,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982908975] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:28:41,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:28:41,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-07-13 16:28:41,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737964260] [2022-07-13 16:28:41,949 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:28:41,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 16:28:41,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:28:41,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 16:28:41,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-07-13 16:28:41,951 INFO L87 Difference]: Start difference. First operand 744 states and 967 transitions. Second operand has 19 states, 19 states have (on average 6.105263157894737) internal successors, (116), 17 states have internal predecessors, (116), 14 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (37), 16 states have call predecessors, (37), 14 states have call successors, (37) [2022-07-13 16:28:45,336 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 16:28:47,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:28:47,586 INFO L93 Difference]: Finished difference Result 1363 states and 1823 transitions. [2022-07-13 16:28:47,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-13 16:28:47,587 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.105263157894737) internal successors, (116), 17 states have internal predecessors, (116), 14 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (37), 16 states have call predecessors, (37), 14 states have call successors, (37) Word has length 179 [2022-07-13 16:28:47,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:28:47,591 INFO L225 Difference]: With dead ends: 1363 [2022-07-13 16:28:47,591 INFO L226 Difference]: Without dead ends: 1070 [2022-07-13 16:28:47,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 339 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-07-13 16:28:47,593 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 48 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-13 16:28:47,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 988 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 336 Invalid, 1 Unknown, 233 Unchecked, 3.3s Time] [2022-07-13 16:28:47,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-07-13 16:28:47,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 964. [2022-07-13 16:28:47,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 734 states have (on average 1.2002724795640327) internal successors, (881), 734 states have internal predecessors, (881), 207 states have call successors, (207), 23 states have call predecessors, (207), 22 states have return successors, (206), 206 states have call predecessors, (206), 206 states have call successors, (206) [2022-07-13 16:28:47,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1294 transitions. [2022-07-13 16:28:47,693 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1294 transitions. Word has length 179 [2022-07-13 16:28:47,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:28:47,694 INFO L495 AbstractCegarLoop]: Abstraction has 964 states and 1294 transitions. [2022-07-13 16:28:47,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.105263157894737) internal successors, (116), 17 states have internal predecessors, (116), 14 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (37), 16 states have call predecessors, (37), 14 states have call successors, (37) [2022-07-13 16:28:47,694 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1294 transitions. [2022-07-13 16:28:47,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-13 16:28:47,697 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:28:47,698 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 9, 9, 9, 9, 7, 7, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:28:47,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-13 16:28:47,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-13 16:28:47,911 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:28:47,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:28:47,912 INFO L85 PathProgramCache]: Analyzing trace with hash 956641480, now seen corresponding path program 3 times [2022-07-13 16:28:47,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:28:47,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558510795] [2022-07-13 16:28:47,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:47,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:28:47,931 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:28:47,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1838279345] [2022-07-13 16:28:47,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 16:28:47,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:28:47,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:28:47,933 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:28:47,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-13 16:28:48,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 16:28:48,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 16:28:48,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 16:28:48,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:28:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 128 proven. 1 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2022-07-13 16:28:48,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:28:54,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:28:54,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558510795] [2022-07-13 16:28:54,349 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:28:54,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838279345] [2022-07-13 16:28:54,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838279345] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 16:28:54,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-13 16:28:54,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-07-13 16:28:54,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637912827] [2022-07-13 16:28:54,350 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-13 16:28:54,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 16:28:54,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:28:54,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 16:28:54,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=84, Unknown=1, NotChecked=0, Total=110 [2022-07-13 16:28:54,351 INFO L87 Difference]: Start difference. First operand 964 states and 1294 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 16:28:55,788 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:28:57,892 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:28:58,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:28:58,074 INFO L93 Difference]: Finished difference Result 1059 states and 1415 transitions. [2022-07-13 16:28:58,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 16:28:58,074 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 179 [2022-07-13 16:28:58,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:28:58,078 INFO L225 Difference]: With dead ends: 1059 [2022-07-13 16:28:58,079 INFO L226 Difference]: Without dead ends: 991 [2022-07-13 16:28:58,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 176 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=43, Invalid=138, Unknown=1, NotChecked=0, Total=182 [2022-07-13 16:28:58,080 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 38 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-07-13 16:28:58,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 214 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 130 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2022-07-13 16:28:58,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-07-13 16:28:58,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 931. [2022-07-13 16:28:58,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 703 states have (on average 1.1906116642958748) internal successors, (837), 714 states have internal predecessors, (837), 203 states have call successors, (203), 25 states have call predecessors, (203), 24 states have return successors, (202), 191 states have call predecessors, (202), 202 states have call successors, (202) [2022-07-13 16:28:58,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1242 transitions. [2022-07-13 16:28:58,186 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1242 transitions. Word has length 179 [2022-07-13 16:28:58,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:28:58,187 INFO L495 AbstractCegarLoop]: Abstraction has 931 states and 1242 transitions. [2022-07-13 16:28:58,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 16:28:58,187 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1242 transitions. [2022-07-13 16:28:58,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-13 16:28:58,191 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:28:58,191 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 10, 10, 10, 10, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:28:58,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-13 16:28:58,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:28:58,400 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:28:58,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:28:58,400 INFO L85 PathProgramCache]: Analyzing trace with hash 25864770, now seen corresponding path program 4 times [2022-07-13 16:28:58,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:28:58,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673463146] [2022-07-13 16:28:58,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:28:58,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:28:58,420 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:28:58,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [562805005] [2022-07-13 16:28:58,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 16:28:58,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:28:58,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:28:58,422 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:28:58,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-13 16:28:58,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 16:28:58,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 16:28:58,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 16:28:58,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:28:58,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 402 proven. 144 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2022-07-13 16:28:58,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:28:59,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 142 proven. 156 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2022-07-13 16:28:59,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:28:59,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673463146] [2022-07-13 16:28:59,001 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:28:59,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562805005] [2022-07-13 16:28:59,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562805005] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:28:59,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:28:59,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-07-13 16:28:59,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933884559] [2022-07-13 16:28:59,002 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:28:59,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 16:28:59,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:28:59,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 16:28:59,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-07-13 16:28:59,003 INFO L87 Difference]: Start difference. First operand 931 states and 1242 transitions. Second operand has 18 states, 18 states have (on average 6.5) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (36), 18 states have call predecessors, (36), 18 states have call successors, (36) [2022-07-13 16:29:00,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:29:00,333 INFO L93 Difference]: Finished difference Result 2205 states and 2989 transitions. [2022-07-13 16:29:00,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-13 16:29:00,334 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.5) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (36), 18 states have call predecessors, (36), 18 states have call successors, (36) Word has length 179 [2022-07-13 16:29:00,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:29:00,342 INFO L225 Difference]: With dead ends: 2205 [2022-07-13 16:29:00,342 INFO L226 Difference]: Without dead ends: 1754 [2022-07-13 16:29:00,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=379, Invalid=953, Unknown=0, NotChecked=0, Total=1332 [2022-07-13 16:29:00,345 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 200 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 16:29:00,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 818 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 16:29:00,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1754 states. [2022-07-13 16:29:00,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1754 to 1257. [2022-07-13 16:29:00,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 952 states have (on average 1.1680672268907564) internal successors, (1112), 963 states have internal predecessors, (1112), 280 states have call successors, (280), 25 states have call predecessors, (280), 24 states have return successors, (279), 268 states have call predecessors, (279), 279 states have call successors, (279) [2022-07-13 16:29:00,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 1671 transitions. [2022-07-13 16:29:00,545 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 1671 transitions. Word has length 179 [2022-07-13 16:29:00,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:29:00,545 INFO L495 AbstractCegarLoop]: Abstraction has 1257 states and 1671 transitions. [2022-07-13 16:29:00,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.5) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (36), 18 states have call predecessors, (36), 18 states have call successors, (36) [2022-07-13 16:29:00,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 1671 transitions. [2022-07-13 16:29:00,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-13 16:29:00,551 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:29:00,551 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 11, 11, 11, 8, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:29:00,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-13 16:29:00,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:29:00,766 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:29:00,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:29:00,767 INFO L85 PathProgramCache]: Analyzing trace with hash -95756022, now seen corresponding path program 5 times [2022-07-13 16:29:00,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:29:00,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906291896] [2022-07-13 16:29:00,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:29:00,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:29:00,776 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:29:00,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2081212541] [2022-07-13 16:29:00,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 16:29:00,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:29:00,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:29:00,778 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:29:00,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-13 16:29:01,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-07-13 16:29:01,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-07-13 16:29:01,124 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 16:29:01,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 16:29:01,278 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 16:29:01,278 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 16:29:01,279 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-13 16:29:01,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-13 16:29:01,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:29:01,489 INFO L356 BasicCegarLoop]: Path program histogram: [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:29:01,492 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-13 16:29:01,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 04:29:01 BoogieIcfgContainer [2022-07-13 16:29:01,563 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-13 16:29:01,564 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-13 16:29:01,564 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-13 16:29:01,564 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-13 16:29:01,564 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 04:28:19" (3/4) ... [2022-07-13 16:29:01,566 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-13 16:29:01,634 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-13 16:29:01,636 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-13 16:29:01,637 INFO L158 Benchmark]: Toolchain (without parser) took 42967.14ms. Allocated memory was 92.3MB in the beginning and 176.2MB in the end (delta: 83.9MB). Free memory was 70.7MB in the beginning and 52.0MB in the end (delta: 18.7MB). Peak memory consumption was 101.9MB. Max. memory is 16.1GB. [2022-07-13 16:29:01,637 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 92.3MB. Free memory is still 68.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 16:29:01,637 INFO L158 Benchmark]: CACSL2BoogieTranslator took 247.11ms. Allocated memory is still 92.3MB. Free memory was 70.3MB in the beginning and 60.0MB in the end (delta: 10.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-13 16:29:01,638 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.33ms. Allocated memory is still 92.3MB. Free memory was 59.8MB in the beginning and 58.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 16:29:01,638 INFO L158 Benchmark]: Boogie Preprocessor took 16.10ms. Allocated memory is still 92.3MB. Free memory was 58.3MB in the beginning and 57.2MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 16:29:01,641 INFO L158 Benchmark]: RCFGBuilder took 265.68ms. Allocated memory is still 92.3MB. Free memory was 57.2MB in the beginning and 46.8MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-13 16:29:01,641 INFO L158 Benchmark]: TraceAbstraction took 42320.38ms. Allocated memory was 92.3MB in the beginning and 176.2MB in the end (delta: 83.9MB). Free memory was 46.2MB in the beginning and 58.3MB in the end (delta: -12.1MB). Peak memory consumption was 74.6MB. Max. memory is 16.1GB. [2022-07-13 16:29:01,641 INFO L158 Benchmark]: Witness Printer took 72.75ms. Allocated memory is still 176.2MB. Free memory was 58.3MB in the beginning and 52.0MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-13 16:29:01,642 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 92.3MB. Free memory is still 68.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 247.11ms. Allocated memory is still 92.3MB. Free memory was 70.3MB in the beginning and 60.0MB in the end (delta: 10.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.33ms. Allocated memory is still 92.3MB. Free memory was 59.8MB in the beginning and 58.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.10ms. Allocated memory is still 92.3MB. Free memory was 58.3MB in the beginning and 57.2MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 265.68ms. Allocated memory is still 92.3MB. Free memory was 57.2MB in the beginning and 46.8MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 42320.38ms. Allocated memory was 92.3MB in the beginning and 176.2MB in the end (delta: 83.9MB). Free memory was 46.2MB in the beginning and 58.3MB in the end (delta: -12.1MB). Peak memory consumption was 74.6MB. Max. memory is 16.1GB. * Witness Printer took 72.75ms. Allocated memory is still 176.2MB. Free memory was 58.3MB in the beginning and 52.0MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(cond)=1, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L25] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [A=573, counter=0, R=23] [L27] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L27] RET assume_abort_if_not(A % 2 == 1) VAL [A=573, counter=0, R=23] [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A VAL [A=573, counter=0, R=23, r=-44, u=47, v=1] [L34] EXPR counter++ VAL [A=573, counter=1, counter++=0, r=-44, R=23, u=47, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=1, R=23, r=-44, u=47, v=1] [L36] COND FALSE !(!(r != 0)) VAL [A=573, counter=1, R=23, r=-44, u=47, v=1] [L39] EXPR counter++ VAL [A=573, counter=2, counter++=1, r=-44, R=23, u=47, v=1] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=2, R=23, r=-44, u=47, v=1] [L41] COND TRUE !(r > 0) VAL [A=573, counter=2, R=23, r=-44, u=47, v=1] [L47] EXPR counter++ VAL [A=573, counter=3, counter++=2, r=-44, R=23, u=47, v=1] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=3] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=3, r=-44, R=23, u=47, v=1] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [A=573, counter=3, r=3, R=23, u=49, v=1] [L47] EXPR counter++ VAL [A=573, counter=4, counter++=3, R=23, r=3, u=49, v=1] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=4] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=4, R=23, r=3, u=49, v=1] [L49] COND TRUE !(r < 0) VAL [A=573, counter=4, r=3, R=23, u=49, v=1] [L34] EXPR counter++ VAL [A=573, counter=5, counter++=4, R=23, r=3, u=49, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=5] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=5, R=23, r=3, u=49, v=1] [L36] COND FALSE !(!(r != 0)) VAL [A=573, counter=5, r=3, R=23, u=49, v=1] [L39] EXPR counter++ VAL [A=573, counter=6, counter++=5, R=23, r=3, u=49, v=1] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=6] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=6, R=23, r=3, u=49, v=1] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=573, counter=6, R=23, r=2, u=49, v=3] [L39] EXPR counter++ VAL [A=573, counter=7, counter++=6, r=2, R=23, u=49, v=3] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=7] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=7, r=2, R=23, u=49, v=3] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=573, counter=7, R=23, r=-1, u=49, v=5] [L39] EXPR counter++ VAL [A=573, counter=8, counter++=7, R=23, r=-1, u=49, v=5] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=8] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=8, r=-1, R=23, u=49, v=5] [L41] COND TRUE !(r > 0) VAL [A=573, counter=8, R=23, r=-1, u=49, v=5] [L47] EXPR counter++ VAL [A=573, counter=9, counter++=8, r=-1, R=23, u=49, v=5] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=9] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=9, R=23, r=-1, u=49, v=5] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [A=573, counter=9, R=23, r=48, u=51, v=5] [L47] EXPR counter++ VAL [A=573, counter=10, counter++=9, R=23, r=48, u=51, v=5] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=10] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=10, R=23, r=48, u=51, v=5] [L49] COND TRUE !(r < 0) VAL [A=573, counter=10, R=23, r=48, u=51, v=5] [L34] EXPR counter++ VAL [A=573, counter=11, counter++=10, R=23, r=48, u=51, v=5] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=11] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=11] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=11, R=23, r=48, u=51, v=5] [L36] COND FALSE !(!(r != 0)) VAL [A=573, counter=11, R=23, r=48, u=51, v=5] [L39] EXPR counter++ VAL [A=573, counter=12, counter++=11, r=48, R=23, u=51, v=5] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=12] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=12] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=12, R=23, r=48, u=51, v=5] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=573, counter=12, r=43, R=23, u=51, v=7] [L39] EXPR counter++ VAL [A=573, counter=13, counter++=12, R=23, r=43, u=51, v=7] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=13] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=13] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=13, R=23, r=43, u=51, v=7] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=573, counter=13, R=23, r=36, u=51, v=9] [L39] EXPR counter++ VAL [A=573, counter=14, counter++=13, R=23, r=36, u=51, v=9] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=14] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=14] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=14, r=36, R=23, u=51, v=9] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=573, counter=14, R=23, r=27, u=51, v=11] [L39] EXPR counter++ VAL [A=573, counter=15, counter++=14, r=27, R=23, u=51, v=11] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=15] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=15] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=15, R=23, r=27, u=51, v=11] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=573, counter=15, r=16, R=23, u=51, v=13] [L39] EXPR counter++ VAL [A=573, counter=16, counter++=15, R=23, r=16, u=51, v=13] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=16] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=16] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=16, R=23, r=16, u=51, v=13] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=573, counter=16, R=23, r=3, u=51, v=15] [L39] EXPR counter++ VAL [A=573, counter=17, counter++=16, R=23, r=3, u=51, v=15] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=17] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=17] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=17, R=23, r=3, u=51, v=15] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=573, counter=17, r=-12, R=23, u=51, v=17] [L39] EXPR counter++ VAL [A=573, counter=18, counter++=17, r=-12, R=23, u=51, v=17] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=18] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=18] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=18, R=23, r=-12, u=51, v=17] [L41] COND TRUE !(r > 0) VAL [A=573, counter=18, R=23, r=-12, u=51, v=17] [L47] EXPR counter++ VAL [A=573, counter=19, counter++=18, r=-12, R=23, u=51, v=17] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=19] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=19] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=19, R=23, r=-12, u=51, v=17] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [A=573, counter=19, R=23, r=39, u=53, v=17] [L47] EXPR counter++ VAL [A=573, counter=20, counter++=19, R=23, r=39, u=53, v=17] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=20] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=20] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=20, r=39, R=23, u=53, v=17] [L49] COND TRUE !(r < 0) VAL [A=573, counter=20, r=39, R=23, u=53, v=17] [L34] EXPR counter++ VAL [A=573, counter=21, counter++=20, r=39, R=23, u=53, v=17] [L34] COND FALSE !(counter++<20) [L56] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, counter=21] [L12] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=21] [L14] reach_error() VAL [\old(cond)=0, cond=0, counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 42.2s, OverallIterations: 21, TraceHistogramMax: 21, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.1s, AutomataDifference: 21.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 2606 SdHoareTripleChecker+Valid, 16.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2589 mSDsluCounter, 5402 SdHoareTripleChecker+Invalid, 15.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 233 IncrementalHoareTripleChecker+Unchecked, 4207 mSDsCounter, 1492 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3219 IncrementalHoareTripleChecker+Invalid, 4946 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1492 mSolverCounterUnsat, 1195 mSDtfsCounter, 3219 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2933 GetRequests, 2621 SyntacticMatches, 8 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 11.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1257occurred in iteration=20, InterpolantAutomatonStates: 301, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 946 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 13.0s InterpolantComputationTime, 1924 NumberOfCodeBlocks, 1653 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 2807 ConstructedInterpolants, 45 QuantifiedInterpolants, 10275 SizeOfPredicates, 77 NumberOfNonLiveVariables, 3650 ConjunctsInSsa, 222 ConjunctsInUnsatCore, 32 InterpolantComputations, 8 PerfectInterpolantSequences, 8903/11070 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-07-13 16:29:01,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE