./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard2_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/hard2_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 b0dc7e6cdf006545b97e616af165994b39a2e54c024b52d6607380c5e84ee914 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 16:43:09,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 16:43:09,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 16:43:09,749 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 16:43:09,750 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 16:43:09,751 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 16:43:09,755 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 16:43:09,757 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 16:43:09,758 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 16:43:09,762 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 16:43:09,764 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 16:43:09,765 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 16:43:09,765 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 16:43:09,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 16:43:09,768 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 16:43:09,769 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 16:43:09,770 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 16:43:09,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 16:43:09,775 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 16:43:09,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 16:43:09,782 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 16:43:09,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 16:43:09,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 16:43:09,784 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 16:43:09,785 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 16:43:09,787 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 16:43:09,787 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 16:43:09,787 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 16:43:09,788 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 16:43:09,788 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 16:43:09,789 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 16:43:09,789 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 16:43:09,791 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 16:43:09,791 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 16:43:09,791 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 16:43:09,792 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 16:43:09,792 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 16:43:09,793 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 16:43:09,793 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 16:43:09,793 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 16:43:09,793 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 16:43:09,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 16:43:09,796 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 16:43:09,826 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 16:43:09,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 16:43:09,826 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 16:43:09,827 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 16:43:09,827 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 16:43:09,827 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 16:43:09,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 16:43:09,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 16:43:09,828 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 16:43:09,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 16:43:09,829 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 16:43:09,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 16:43:09,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 16:43:09,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 16:43:09,830 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 16:43:09,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 16:43:09,830 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 16:43:09,830 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 16:43:09,830 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 16:43:09,831 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 16:43:09,831 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 16:43:09,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 16:43:09,831 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 16:43:09,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 16:43:09,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 16:43:09,832 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 16:43:09,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 16:43:09,832 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 16:43:09,832 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 16:43:09,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 16:43:09,833 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 16:43:09,833 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 16:43:09,833 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 16:43:09,833 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b0dc7e6cdf006545b97e616af165994b39a2e54c024b52d6607380c5e84ee914 [2022-07-13 16:43:10,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 16:43:10,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 16:43:10,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 16:43:10,085 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 16:43:10,086 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 16:43:10,087 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound20.c [2022-07-13 16:43:10,126 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/697422e46/a1acd8ce92324e0998d7fa0930033b78/FLAGaaedcf7ef [2022-07-13 16:43:10,476 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 16:43:10,477 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound20.c [2022-07-13 16:43:10,483 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/697422e46/a1acd8ce92324e0998d7fa0930033b78/FLAGaaedcf7ef [2022-07-13 16:43:10,495 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/697422e46/a1acd8ce92324e0998d7fa0930033b78 [2022-07-13 16:43:10,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 16:43:10,498 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 16:43:10,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 16:43:10,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 16:43:10,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 16:43:10,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 04:43:10" (1/1) ... [2022-07-13 16:43:10,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40c84455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:43:10, skipping insertion in model container [2022-07-13 16:43:10,503 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 04:43:10" (1/1) ... [2022-07-13 16:43:10,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 16:43:10,521 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 16:43:10,644 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound20.c[526,539] [2022-07-13 16:43:10,654 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 16:43:10,673 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 16:43:10,700 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound20.c[526,539] [2022-07-13 16:43:10,719 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 16:43:10,732 INFO L208 MainTranslator]: Completed translation [2022-07-13 16:43:10,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:43:10 WrapperNode [2022-07-13 16:43:10,733 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 16:43:10,734 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 16:43:10,734 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 16:43:10,734 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 16:43:10,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:43:10" (1/1) ... [2022-07-13 16:43:10,743 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:43:10" (1/1) ... [2022-07-13 16:43:10,757 INFO L137 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 61 [2022-07-13 16:43:10,758 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 16:43:10,759 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 16:43:10,759 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 16:43:10,759 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 16:43:10,764 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:43:10" (1/1) ... [2022-07-13 16:43:10,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:43:10" (1/1) ... [2022-07-13 16:43:10,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:43:10" (1/1) ... [2022-07-13 16:43:10,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:43:10" (1/1) ... [2022-07-13 16:43:10,779 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:43:10" (1/1) ... [2022-07-13 16:43:10,782 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:43:10" (1/1) ... [2022-07-13 16:43:10,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:43:10" (1/1) ... [2022-07-13 16:43:10,788 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 16:43:10,789 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 16:43:10,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 16:43:10,790 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 16:43:10,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:43:10" (1/1) ... [2022-07-13 16:43:10,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 16:43:10,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:43:10,820 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 16:43:10,839 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 16:43:10,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 16:43:10,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 16:43:10,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 16:43:10,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 16:43:10,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-13 16:43:10,849 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-13 16:43:10,899 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 16:43:10,900 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 16:43:11,019 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 16:43:11,024 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 16:43:11,024 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 16:43:11,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 04:43:11 BoogieIcfgContainer [2022-07-13 16:43:11,026 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 16:43:11,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 16:43:11,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 16:43:11,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 16:43:11,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 04:43:10" (1/3) ... [2022-07-13 16:43:11,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@264ff78c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 04:43:11, skipping insertion in model container [2022-07-13 16:43:11,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:43:10" (2/3) ... [2022-07-13 16:43:11,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@264ff78c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 04:43:11, skipping insertion in model container [2022-07-13 16:43:11,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 04:43:11" (3/3) ... [2022-07-13 16:43:11,063 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound20.c [2022-07-13 16:43:11,080 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 16:43:11,081 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 16:43:11,151 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 16:43:11,157 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@314e2140, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@335c99a2 [2022-07-13 16:43:11,158 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 16:43:11,163 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-13 16:43:11,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-13 16:43:11,169 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:43:11,170 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:43:11,171 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:43:11,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:43:11,175 INFO L85 PathProgramCache]: Analyzing trace with hash 643118537, now seen corresponding path program 1 times [2022-07-13 16:43:11,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:43:11,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634180823] [2022-07-13 16:43:11,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:43:11,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:43:11,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:43:11,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 16:43:11,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:43:11,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634180823] [2022-07-13 16:43:11,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634180823] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:43:11,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:43:11,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 16:43:11,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053257354] [2022-07-13 16:43:11,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:43:11,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 16:43:11,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:43:11,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 16:43:11,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 16:43:11,312 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 16:43:11,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:43:11,328 INFO L93 Difference]: Finished difference Result 50 states and 83 transitions. [2022-07-13 16:43:11,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 16:43:11,330 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-13 16:43:11,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:43:11,338 INFO L225 Difference]: With dead ends: 50 [2022-07-13 16:43:11,339 INFO L226 Difference]: Without dead ends: 22 [2022-07-13 16:43:11,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 16:43:11,344 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:43:11,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:43:11,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-13 16:43:11,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-07-13 16:43:11,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 16:43:11,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2022-07-13 16:43:11,374 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 8 [2022-07-13 16:43:11,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:43:11,375 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2022-07-13 16:43:11,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 16:43:11,376 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2022-07-13 16:43:11,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-13 16:43:11,376 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:43:11,376 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:43:11,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 16:43:11,377 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:43:11,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:43:11,378 INFO L85 PathProgramCache]: Analyzing trace with hash 181060127, now seen corresponding path program 1 times [2022-07-13 16:43:11,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:43:11,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802003636] [2022-07-13 16:43:11,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:43:11,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:43:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:43:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 16:43:11,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:43:11,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802003636] [2022-07-13 16:43:11,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802003636] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:43:11,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:43:11,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 16:43:11,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075126145] [2022-07-13 16:43:11,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:43:11,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 16:43:11,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:43:11,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 16:43:11,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 16:43:11,477 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 16:43:11,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:43:11,519 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2022-07-13 16:43:11,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 16:43:11,520 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-13 16:43:11,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:43:11,521 INFO L225 Difference]: With dead ends: 36 [2022-07-13 16:43:11,521 INFO L226 Difference]: Without dead ends: 34 [2022-07-13 16:43:11,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 16:43:11,522 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:43:11,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 99 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:43:11,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-13 16:43:11,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2022-07-13 16:43:11,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 16:43:11,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2022-07-13 16:43:11,528 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 8 [2022-07-13 16:43:11,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:43:11,529 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2022-07-13 16:43:11,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 16:43:11,529 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2022-07-13 16:43:11,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-13 16:43:11,538 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:43:11,538 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:43:11,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 16:43:11,539 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:43:11,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:43:11,539 INFO L85 PathProgramCache]: Analyzing trace with hash -712280900, now seen corresponding path program 1 times [2022-07-13 16:43:11,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:43:11,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520583756] [2022-07-13 16:43:11,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:43:11,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:43:11,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:43:11,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 16:43:11,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:43:11,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520583756] [2022-07-13 16:43:11,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520583756] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:43:11,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:43:11,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 16:43:11,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879959110] [2022-07-13 16:43:11,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:43:11,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 16:43:11,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:43:11,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 16:43:11,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 16:43:11,573 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 16:43:11,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:43:11,583 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2022-07-13 16:43:11,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 16:43:11,583 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-13 16:43:11,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:43:11,584 INFO L225 Difference]: With dead ends: 42 [2022-07-13 16:43:11,584 INFO L226 Difference]: Without dead ends: 28 [2022-07-13 16:43:11,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 16:43:11,585 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:43:11,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:43:11,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-13 16:43:11,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-07-13 16:43:11,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 16:43:11,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2022-07-13 16:43:11,590 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2022-07-13 16:43:11,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:43:11,590 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2022-07-13 16:43:11,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 16:43:11,590 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2022-07-13 16:43:11,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-13 16:43:11,591 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:43:11,591 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:43:11,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 16:43:11,591 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:43:11,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:43:11,592 INFO L85 PathProgramCache]: Analyzing trace with hash 2036073049, now seen corresponding path program 1 times [2022-07-13 16:43:11,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:43:11,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571049344] [2022-07-13 16:43:11,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:43:11,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:43:11,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:43:11,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 16:43:11,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:43:11,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 16:43:11,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:43:11,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571049344] [2022-07-13 16:43:11,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571049344] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:43:11,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:43:11,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 16:43:11,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714599366] [2022-07-13 16:43:11,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:43:11,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 16:43:11,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:43:11,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 16:43:11,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 16:43:11,651 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 16:43:11,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:43:11,707 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2022-07-13 16:43:11,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 16:43:11,708 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-07-13 16:43:11,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:43:11,708 INFO L225 Difference]: With dead ends: 42 [2022-07-13 16:43:11,709 INFO L226 Difference]: Without dead ends: 40 [2022-07-13 16:43:11,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 16:43:11,710 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:43:11,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 95 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:43:11,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-13 16:43:11,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2022-07-13 16:43:11,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 16:43:11,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-07-13 16:43:11,725 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 13 [2022-07-13 16:43:11,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:43:11,726 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-07-13 16:43:11,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 16:43:11,726 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-07-13 16:43:11,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-13 16:43:11,727 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:43:11,727 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:43:11,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 16:43:11,728 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:43:11,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:43:11,729 INFO L85 PathProgramCache]: Analyzing trace with hash 380169759, now seen corresponding path program 1 times [2022-07-13 16:43:11,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:43:11,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47789234] [2022-07-13 16:43:11,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:43:11,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:43:11,738 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:43:11,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [442865110] [2022-07-13 16:43:11,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:43:11,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:43:11,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:43:11,740 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 16:43:11,741 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 16:43:11,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:43:11,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 16:43:11,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:43:11,854 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 16:43:11,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:43:11,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:43:11,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47789234] [2022-07-13 16:43:11,855 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:43:11,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442865110] [2022-07-13 16:43:11,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442865110] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:43:11,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:43:11,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 16:43:11,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997578909] [2022-07-13 16:43:11,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:43:11,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 16:43:11,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:43:11,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 16:43:11,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 16:43:11,858 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 16:43:11,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:43:11,933 INFO L93 Difference]: Finished difference Result 61 states and 83 transitions. [2022-07-13 16:43:11,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 16:43:11,934 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-07-13 16:43:11,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:43:11,935 INFO L225 Difference]: With dead ends: 61 [2022-07-13 16:43:11,935 INFO L226 Difference]: Without dead ends: 46 [2022-07-13 16:43:11,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 16:43:11,936 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 10 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 16:43:11,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 105 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 16:43:11,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-13 16:43:11,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-07-13 16:43:11,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 30 states have internal predecessors, (36), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-13 16:43:11,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2022-07-13 16:43:11,947 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 18 [2022-07-13 16:43:11,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:43:11,948 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2022-07-13 16:43:11,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 16:43:11,948 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2022-07-13 16:43:11,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-13 16:43:11,949 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:43:11,949 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:43:11,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 16:43:12,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:43:12,160 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:43:12,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:43:12,160 INFO L85 PathProgramCache]: Analyzing trace with hash -461064832, now seen corresponding path program 1 times [2022-07-13 16:43:12,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:43:12,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436633841] [2022-07-13 16:43:12,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:43:12,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:43:12,168 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:43:12,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [596799426] [2022-07-13 16:43:12,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:43:12,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:43:12,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:43:12,171 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 16:43:12,172 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 16:43:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:43:12,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 16:43:12,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:43:12,268 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 16:43:12,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:43:12,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:43:12,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436633841] [2022-07-13 16:43:12,268 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:43:12,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596799426] [2022-07-13 16:43:12,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596799426] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:43:12,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:43:12,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 16:43:12,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683050109] [2022-07-13 16:43:12,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:43:12,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 16:43:12,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:43:12,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 16:43:12,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 16:43:12,270 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 16:43:12,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:43:12,337 INFO L93 Difference]: Finished difference Result 60 states and 79 transitions. [2022-07-13 16:43:12,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 16:43:12,338 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-07-13 16:43:12,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:43:12,339 INFO L225 Difference]: With dead ends: 60 [2022-07-13 16:43:12,339 INFO L226 Difference]: Without dead ends: 52 [2022-07-13 16:43:12,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 16:43:12,347 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 16:43:12,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 79 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 16:43:12,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-13 16:43:12,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-07-13 16:43:12,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.28125) internal successors, (41), 34 states have internal predecessors, (41), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-13 16:43:12,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2022-07-13 16:43:12,362 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 26 [2022-07-13 16:43:12,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:43:12,362 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2022-07-13 16:43:12,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 16:43:12,363 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2022-07-13 16:43:12,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-13 16:43:12,364 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:43:12,365 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:43:12,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 16:43:12,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-13 16:43:12,573 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:43:12,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:43:12,574 INFO L85 PathProgramCache]: Analyzing trace with hash -909290541, now seen corresponding path program 1 times [2022-07-13 16:43:12,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:43:12,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163984860] [2022-07-13 16:43:12,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:43:12,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:43:12,582 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:43:12,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653600002] [2022-07-13 16:43:12,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:43:12,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:43:12,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:43:12,585 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 16:43:12,586 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 16:43:12,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:43:12,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 16:43:12,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:43:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-13 16:43:12,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:43:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 16:43:12,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:43:12,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163984860] [2022-07-13 16:43:12,723 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:43:12,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653600002] [2022-07-13 16:43:12,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653600002] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:43:12,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:43:12,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-07-13 16:43:12,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850805039] [2022-07-13 16:43:12,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:43:12,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 16:43:12,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:43:12,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 16:43:12,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-13 16:43:12,725 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-13 16:43:12,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:43:12,822 INFO L93 Difference]: Finished difference Result 140 states and 173 transitions. [2022-07-13 16:43:12,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 16:43:12,822 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 33 [2022-07-13 16:43:12,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:43:12,827 INFO L225 Difference]: With dead ends: 140 [2022-07-13 16:43:12,828 INFO L226 Difference]: Without dead ends: 115 [2022-07-13 16:43:12,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-13 16:43:12,831 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 50 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 16:43:12,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 153 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 16:43:12,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-13 16:43:12,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 108. [2022-07-13 16:43:12,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 73 states have internal predecessors, (85), 23 states have call successors, (23), 14 states have call predecessors, (23), 14 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-13 16:43:12,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 129 transitions. [2022-07-13 16:43:12,844 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 129 transitions. Word has length 33 [2022-07-13 16:43:12,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:43:12,844 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 129 transitions. [2022-07-13 16:43:12,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-13 16:43:12,844 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 129 transitions. [2022-07-13 16:43:12,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-13 16:43:12,845 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:43:12,845 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-13 16:43:12,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 16:43:13,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:43:13,048 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:43:13,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:43:13,048 INFO L85 PathProgramCache]: Analyzing trace with hash 252591112, now seen corresponding path program 1 times [2022-07-13 16:43:13,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:43:13,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209120023] [2022-07-13 16:43:13,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:43:13,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:43:13,056 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:43:13,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [480234895] [2022-07-13 16:43:13,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:43:13,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:43:13,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:43:13,057 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 16:43:13,058 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 16:43:13,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:43:13,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-13 16:43:13,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:43:13,165 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 16:43:13,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:43:13,208 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 16:43:13,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:43:13,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209120023] [2022-07-13 16:43:13,209 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:43:13,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480234895] [2022-07-13 16:43:13,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480234895] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 16:43:13,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 16:43:13,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-07-13 16:43:13,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13153706] [2022-07-13 16:43:13,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:43:13,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 16:43:13,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:43:13,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 16:43:13,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 16:43:13,211 INFO L87 Difference]: Start difference. First operand 108 states and 129 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 16:43:13,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:43:13,848 INFO L93 Difference]: Finished difference Result 125 states and 150 transitions. [2022-07-13 16:43:13,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 16:43:13,849 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2022-07-13 16:43:13,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:43:13,850 INFO L225 Difference]: With dead ends: 125 [2022-07-13 16:43:13,850 INFO L226 Difference]: Without dead ends: 121 [2022-07-13 16:43:13,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 16:43:13,851 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 16:43:13,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 87 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 16:43:13,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-13 16:43:13,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2022-07-13 16:43:13,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 80 states have internal predecessors, (91), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-13 16:43:13,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 139 transitions. [2022-07-13 16:43:13,861 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 139 transitions. Word has length 36 [2022-07-13 16:43:13,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:43:13,861 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 139 transitions. [2022-07-13 16:43:13,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 16:43:13,862 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 139 transitions. [2022-07-13 16:43:13,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-13 16:43:13,862 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:43:13,863 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:43:13,882 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 16:43:14,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:43:14,083 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:43:14,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:43:14,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1605675221, now seen corresponding path program 1 times [2022-07-13 16:43:14,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:43:14,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461992281] [2022-07-13 16:43:14,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:43:14,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:43:14,091 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:43:14,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [92402834] [2022-07-13 16:43:14,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:43:14,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:43:14,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:43:14,093 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 16:43:14,094 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 16:43:14,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:43:14,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 16:43:14,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:43:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-13 16:43:14,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:43:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 16:43:14,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:43:14,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461992281] [2022-07-13 16:43:14,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:43:14,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92402834] [2022-07-13 16:43:14,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92402834] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:43:14,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:43:14,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-07-13 16:43:14,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395027083] [2022-07-13 16:43:14,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:43:14,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 16:43:14,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:43:14,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 16:43:14,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-13 16:43:14,227 INFO L87 Difference]: Start difference. First operand 118 states and 139 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-07-13 16:43:14,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:43:14,332 INFO L93 Difference]: Finished difference Result 241 states and 294 transitions. [2022-07-13 16:43:14,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 16:43:14,332 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 49 [2022-07-13 16:43:14,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:43:14,334 INFO L225 Difference]: With dead ends: 241 [2022-07-13 16:43:14,334 INFO L226 Difference]: Without dead ends: 220 [2022-07-13 16:43:14,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-07-13 16:43:14,335 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 80 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 16:43:14,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 268 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 16:43:14,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-07-13 16:43:14,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 213. [2022-07-13 16:43:14,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 138 states have (on average 1.1956521739130435) internal successors, (165), 147 states have internal predecessors, (165), 49 states have call successors, (49), 26 states have call predecessors, (49), 25 states have return successors, (45), 39 states have call predecessors, (45), 45 states have call successors, (45) [2022-07-13 16:43:14,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 259 transitions. [2022-07-13 16:43:14,355 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 259 transitions. Word has length 49 [2022-07-13 16:43:14,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:43:14,357 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 259 transitions. [2022-07-13 16:43:14,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-07-13 16:43:14,357 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 259 transitions. [2022-07-13 16:43:14,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-13 16:43:14,358 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:43:14,358 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:43:14,377 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 16:43:14,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:43:14,559 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:43:14,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:43:14,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1800695307, now seen corresponding path program 1 times [2022-07-13 16:43:14,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:43:14,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856479854] [2022-07-13 16:43:14,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:43:14,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:43:14,567 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:43:14,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573026469] [2022-07-13 16:43:14,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:43:14,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:43:14,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:43:14,569 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 16:43:14,570 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 16:43:14,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:43:14,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-13 16:43:14,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:43:14,822 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-13 16:43:14,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:43:15,441 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-13 16:43:15,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:43:15,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856479854] [2022-07-13 16:43:15,442 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:43:15,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573026469] [2022-07-13 16:43:15,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573026469] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:43:15,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:43:15,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-07-13 16:43:15,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762602180] [2022-07-13 16:43:15,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:43:15,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 16:43:15,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:43:15,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 16:43:15,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-13 16:43:15,445 INFO L87 Difference]: Start difference. First operand 213 states and 259 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-13 16:43:17,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:43:17,353 INFO L93 Difference]: Finished difference Result 367 states and 475 transitions. [2022-07-13 16:43:17,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 16:43:17,354 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 58 [2022-07-13 16:43:17,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:43:17,356 INFO L225 Difference]: With dead ends: 367 [2022-07-13 16:43:17,356 INFO L226 Difference]: Without dead ends: 299 [2022-07-13 16:43:17,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-13 16:43:17,357 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 50 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 16:43:17,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 169 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 16:43:17,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-07-13 16:43:17,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 270. [2022-07-13 16:43:17,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 184 states have (on average 1.233695652173913) internal successors, (227), 190 states have internal predecessors, (227), 56 states have call successors, (56), 29 states have call predecessors, (56), 29 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-07-13 16:43:17,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 337 transitions. [2022-07-13 16:43:17,378 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 337 transitions. Word has length 58 [2022-07-13 16:43:17,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:43:17,378 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 337 transitions. [2022-07-13 16:43:17,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-13 16:43:17,378 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 337 transitions. [2022-07-13 16:43:17,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-13 16:43:17,381 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:43:17,381 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:43:17,405 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 16:43:17,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:43:17,595 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:43:17,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:43:17,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1688778742, now seen corresponding path program 1 times [2022-07-13 16:43:17,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:43:17,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659699175] [2022-07-13 16:43:17,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:43:17,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:43:17,603 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:43:17,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1791024227] [2022-07-13 16:43:17,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:43:17,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:43:17,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:43:17,606 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 16:43:17,611 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 16:43:17,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:43:17,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-13 16:43:17,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:43:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 66 proven. 13 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-13 16:43:17,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:43:18,009 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-07-13 16:43:18,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:43:18,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659699175] [2022-07-13 16:43:18,010 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:43:18,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791024227] [2022-07-13 16:43:18,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791024227] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:43:18,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:43:18,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-07-13 16:43:18,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347777761] [2022-07-13 16:43:18,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:43:18,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 16:43:18,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:43:18,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 16:43:18,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-07-13 16:43:18,012 INFO L87 Difference]: Start difference. First operand 270 states and 337 transitions. Second operand has 16 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-07-13 16:43:18,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:43:18,369 INFO L93 Difference]: Finished difference Result 331 states and 412 transitions. [2022-07-13 16:43:18,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 16:43:18,369 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 69 [2022-07-13 16:43:18,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:43:18,371 INFO L225 Difference]: With dead ends: 331 [2022-07-13 16:43:18,371 INFO L226 Difference]: Without dead ends: 235 [2022-07-13 16:43:18,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-07-13 16:43:18,372 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 50 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 16:43:18,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 176 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 16:43:18,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-07-13 16:43:18,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 219. [2022-07-13 16:43:18,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 149 states have (on average 1.1946308724832215) internal successors, (178), 153 states have internal predecessors, (178), 43 states have call successors, (43), 27 states have call predecessors, (43), 26 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-07-13 16:43:18,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 262 transitions. [2022-07-13 16:43:18,388 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 262 transitions. Word has length 69 [2022-07-13 16:43:18,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:43:18,388 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 262 transitions. [2022-07-13 16:43:18,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-07-13 16:43:18,389 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 262 transitions. [2022-07-13 16:43:18,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-13 16:43:18,389 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:43:18,390 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:43:18,408 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 16:43:18,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:43:18,607 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:43:18,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:43:18,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1687889621, now seen corresponding path program 1 times [2022-07-13 16:43:18,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:43:18,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121311042] [2022-07-13 16:43:18,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:43:18,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:43:18,614 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:43:18,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740970225] [2022-07-13 16:43:18,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:43:18,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:43:18,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:43:18,616 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 16:43:18,617 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 16:43:18,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:43:18,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 16:43:18,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:43:18,740 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-07-13 16:43:18,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:43:18,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:43:18,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121311042] [2022-07-13 16:43:18,741 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:43:18,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740970225] [2022-07-13 16:43:18,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740970225] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:43:18,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:43:18,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 16:43:18,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80079050] [2022-07-13 16:43:18,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:43:18,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 16:43:18,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:43:18,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 16:43:18,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-13 16:43:18,746 INFO L87 Difference]: Start difference. First operand 219 states and 262 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-13 16:43:18,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:43:18,796 INFO L93 Difference]: Finished difference Result 238 states and 285 transitions. [2022-07-13 16:43:18,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 16:43:18,796 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 78 [2022-07-13 16:43:18,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:43:18,798 INFO L225 Difference]: With dead ends: 238 [2022-07-13 16:43:18,798 INFO L226 Difference]: Without dead ends: 218 [2022-07-13 16:43:18,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-13 16:43:18,799 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 26 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:43:18,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 82 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:43:18,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-07-13 16:43:18,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 213. [2022-07-13 16:43:18,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 146 states have (on average 1.1643835616438356) internal successors, (170), 148 states have internal predecessors, (170), 41 states have call successors, (41), 25 states have call predecessors, (41), 25 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-07-13 16:43:18,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 251 transitions. [2022-07-13 16:43:18,819 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 251 transitions. Word has length 78 [2022-07-13 16:43:18,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:43:18,819 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 251 transitions. [2022-07-13 16:43:18,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-13 16:43:18,819 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 251 transitions. [2022-07-13 16:43:18,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-13 16:43:18,821 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:43:18,821 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-07-13 16:43:18,840 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 16:43:19,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-13 16:43:19,032 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:43:19,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:43:19,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1611798954, now seen corresponding path program 2 times [2022-07-13 16:43:19,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:43:19,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049662487] [2022-07-13 16:43:19,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:43:19,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:43:19,039 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:43:19,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285776336] [2022-07-13 16:43:19,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 16:43:19,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:43:19,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:43:19,043 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 16:43:19,045 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 16:43:19,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 16:43:19,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 16:43:19,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-13 16:43:19,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:43:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-07-13 16:43:19,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:43:47,275 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-07-13 16:43:47,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:43:47,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049662487] [2022-07-13 16:43:47,275 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:43:47,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285776336] [2022-07-13 16:43:47,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285776336] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:43:47,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:43:47,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-07-13 16:43:47,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424740169] [2022-07-13 16:43:47,276 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:43:47,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 16:43:47,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:43:47,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 16:43:47,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=179, Unknown=1, NotChecked=0, Total=240 [2022-07-13 16:43:47,277 INFO L87 Difference]: Start difference. First operand 213 states and 251 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 10 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-07-13 16:44:27,006 WARN L233 SmtUtils]: Spent 39.38s on a formula simplification. DAG size of input: 192 DAG size of output: 123 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 16:44:32,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:44:32,293 INFO L93 Difference]: Finished difference Result 328 states and 430 transitions. [2022-07-13 16:44:32,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 16:44:32,293 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 10 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 90 [2022-07-13 16:44:32,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:44:32,295 INFO L225 Difference]: With dead ends: 328 [2022-07-13 16:44:32,303 INFO L226 Difference]: Without dead ends: 271 [2022-07-13 16:44:32,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 161 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 47.6s TimeCoverageRelationStatistics Valid=114, Invalid=305, Unknown=1, NotChecked=0, Total=420 [2022-07-13 16:44:32,306 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 127 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-07-13 16:44:32,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 333 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-07-13 16:44:32,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-07-13 16:44:32,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 253. [2022-07-13 16:44:32,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 171 states have (on average 1.2280701754385965) internal successors, (210), 176 states have internal predecessors, (210), 55 states have call successors, (55), 26 states have call predecessors, (55), 26 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-07-13 16:44:32,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 319 transitions. [2022-07-13 16:44:32,332 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 319 transitions. Word has length 90 [2022-07-13 16:44:32,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:44:32,333 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 319 transitions. [2022-07-13 16:44:32,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 10 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-07-13 16:44:32,333 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 319 transitions. [2022-07-13 16:44:32,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-13 16:44:32,336 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:44:32,336 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:44:32,355 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 16:44:32,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-13 16:44:32,547 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:44:32,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:44:32,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1991126182, now seen corresponding path program 1 times [2022-07-13 16:44:32,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:44:32,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970837716] [2022-07-13 16:44:32,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:44:32,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:44:32,563 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:44:32,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1260476250] [2022-07-13 16:44:32,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:44:32,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:44:32,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:44:32,572 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 16:44:32,572 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 16:44:32,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:44:32,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 16:44:32,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:44:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-13 16:44:32,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:44:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-07-13 16:44:32,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:44:32,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970837716] [2022-07-13 16:44:32,770 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:44:32,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260476250] [2022-07-13 16:44:32,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260476250] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:44:32,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:44:32,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-07-13 16:44:32,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543657516] [2022-07-13 16:44:32,771 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:44:32,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 16:44:32,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:44:32,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 16:44:32,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-13 16:44:32,772 INFO L87 Difference]: Start difference. First operand 253 states and 319 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2022-07-13 16:44:33,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:44:33,072 INFO L93 Difference]: Finished difference Result 742 states and 1012 transitions. [2022-07-13 16:44:33,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 16:44:33,073 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) Word has length 96 [2022-07-13 16:44:33,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:44:33,075 INFO L225 Difference]: With dead ends: 742 [2022-07-13 16:44:33,075 INFO L226 Difference]: Without dead ends: 655 [2022-07-13 16:44:33,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-07-13 16:44:33,076 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 180 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 16:44:33,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 356 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 16:44:33,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-07-13 16:44:33,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 548. [2022-07-13 16:44:33,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 360 states have (on average 1.2833333333333334) internal successors, (462), 377 states have internal predecessors, (462), 134 states have call successors, (134), 54 states have call predecessors, (134), 53 states have return successors, (130), 116 states have call predecessors, (130), 130 states have call successors, (130) [2022-07-13 16:44:33,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 726 transitions. [2022-07-13 16:44:33,128 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 726 transitions. Word has length 96 [2022-07-13 16:44:33,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:44:33,128 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 726 transitions. [2022-07-13 16:44:33,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2022-07-13 16:44:33,129 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 726 transitions. [2022-07-13 16:44:33,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-13 16:44:33,129 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:44:33,129 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:44:33,149 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 16:44:33,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-13 16:44:33,330 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:44:33,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:44:33,330 INFO L85 PathProgramCache]: Analyzing trace with hash -402850320, now seen corresponding path program 1 times [2022-07-13 16:44:33,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:44:33,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611970702] [2022-07-13 16:44:33,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:44:33,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:44:33,336 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:44:33,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [258477413] [2022-07-13 16:44:33,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:44:33,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:44:33,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:44:33,338 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 16:44:33,344 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 16:44:33,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:44:33,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 16:44:33,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:44:33,497 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 414 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-13 16:44:33,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:44:33,617 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-07-13 16:44:33,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:44:33,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611970702] [2022-07-13 16:44:33,618 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:44:33,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258477413] [2022-07-13 16:44:33,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258477413] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:44:33,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:44:33,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2022-07-13 16:44:33,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044660592] [2022-07-13 16:44:33,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:44:33,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 16:44:33,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:44:33,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 16:44:33,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-07-13 16:44:33,620 INFO L87 Difference]: Start difference. First operand 548 states and 726 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 13 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2022-07-13 16:44:34,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:44:34,062 INFO L93 Difference]: Finished difference Result 1155 states and 1609 transitions. [2022-07-13 16:44:34,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-13 16:44:34,063 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 13 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) Word has length 104 [2022-07-13 16:44:34,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:44:34,067 INFO L225 Difference]: With dead ends: 1155 [2022-07-13 16:44:34,067 INFO L226 Difference]: Without dead ends: 1118 [2022-07-13 16:44:34,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2022-07-13 16:44:34,068 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 404 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 16:44:34,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 372 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 16:44:34,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2022-07-13 16:44:34,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1093. [2022-07-13 16:44:34,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1093 states, 728 states have (on average 1.245879120879121) internal successors, (907), 757 states have internal predecessors, (907), 277 states have call successors, (277), 88 states have call predecessors, (277), 87 states have return successors, (269), 247 states have call predecessors, (269), 269 states have call successors, (269) [2022-07-13 16:44:34,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 1453 transitions. [2022-07-13 16:44:34,169 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 1453 transitions. Word has length 104 [2022-07-13 16:44:34,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:44:34,169 INFO L495 AbstractCegarLoop]: Abstraction has 1093 states and 1453 transitions. [2022-07-13 16:44:34,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 13 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2022-07-13 16:44:34,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 1453 transitions. [2022-07-13 16:44:34,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-13 16:44:34,171 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:44:34,171 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:44:34,197 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 16:44:34,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-13 16:44:34,383 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:44:34,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:44:34,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1040094269, now seen corresponding path program 1 times [2022-07-13 16:44:34,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:44:34,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752536675] [2022-07-13 16:44:34,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:44:34,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:44:34,389 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:44:34,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [142210421] [2022-07-13 16:44:34,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:44:34,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:44:34,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:44:34,394 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 16:44:34,395 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 16:44:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:44:34,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 16:44:34,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:44:34,560 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-07-13 16:44:34,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:44:35,079 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-07-13 16:44:35,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:44:35,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752536675] [2022-07-13 16:44:35,080 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:44:35,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142210421] [2022-07-13 16:44:35,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142210421] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:44:35,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:44:35,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-07-13 16:44:35,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142894564] [2022-07-13 16:44:35,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:44:35,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 16:44:35,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:44:35,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 16:44:35,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-13 16:44:35,081 INFO L87 Difference]: Start difference. First operand 1093 states and 1453 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 6 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2022-07-13 16:44:35,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:44:35,352 INFO L93 Difference]: Finished difference Result 1099 states and 1459 transitions. [2022-07-13 16:44:35,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 16:44:35,353 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 6 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) Word has length 106 [2022-07-13 16:44:35,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:44:35,357 INFO L225 Difference]: With dead ends: 1099 [2022-07-13 16:44:35,357 INFO L226 Difference]: Without dead ends: 1093 [2022-07-13 16:44:35,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 198 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-13 16:44:35,359 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 3 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 16:44:35,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 238 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 16:44:35,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2022-07-13 16:44:35,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 1093. [2022-07-13 16:44:35,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1093 states, 728 states have (on average 1.2431318681318682) internal successors, (905), 757 states have internal predecessors, (905), 277 states have call successors, (277), 88 states have call predecessors, (277), 87 states have return successors, (269), 247 states have call predecessors, (269), 269 states have call successors, (269) [2022-07-13 16:44:35,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 1451 transitions. [2022-07-13 16:44:35,453 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 1451 transitions. Word has length 106 [2022-07-13 16:44:35,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:44:35,454 INFO L495 AbstractCegarLoop]: Abstraction has 1093 states and 1451 transitions. [2022-07-13 16:44:35,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 6 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2022-07-13 16:44:35,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 1451 transitions. [2022-07-13 16:44:35,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-13 16:44:35,456 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:44:35,457 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:44:35,475 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 16:44:35,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-13 16:44:35,672 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:44:35,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:44:35,672 INFO L85 PathProgramCache]: Analyzing trace with hash 146904463, now seen corresponding path program 2 times [2022-07-13 16:44:35,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:44:35,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62492962] [2022-07-13 16:44:35,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:44:35,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:44:35,688 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:44:35,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [332049661] [2022-07-13 16:44:35,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 16:44:35,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:44:35,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:44:35,701 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 16:44:35,706 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 16:44:35,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 16:44:35,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 16:44:35,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 16:44:35,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:44:35,804 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 102 proven. 51 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2022-07-13 16:44:35,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:44:35,985 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 69 proven. 18 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-07-13 16:44:35,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:44:35,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62492962] [2022-07-13 16:44:35,986 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:44:35,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332049661] [2022-07-13 16:44:35,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332049661] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:44:35,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:44:35,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-07-13 16:44:35,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315003901] [2022-07-13 16:44:35,986 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:44:35,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 16:44:35,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:44:35,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 16:44:35,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-13 16:44:35,988 INFO L87 Difference]: Start difference. First operand 1093 states and 1451 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 8 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (34), 8 states have call predecessors, (34), 8 states have call successors, (34) [2022-07-13 16:44:36,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:44:36,115 INFO L93 Difference]: Finished difference Result 1316 states and 1734 transitions. [2022-07-13 16:44:36,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 16:44:36,116 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 8 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (34), 8 states have call predecessors, (34), 8 states have call successors, (34) Word has length 120 [2022-07-13 16:44:36,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:44:36,119 INFO L225 Difference]: With dead ends: 1316 [2022-07-13 16:44:36,119 INFO L226 Difference]: Without dead ends: 903 [2022-07-13 16:44:36,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 228 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-13 16:44:36,121 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 5 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:44:36,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 126 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:44:36,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2022-07-13 16:44:36,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 901. [2022-07-13 16:44:36,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 597 states have (on average 1.204355108877722) internal successors, (719), 626 states have internal predecessors, (719), 219 states have call successors, (219), 85 states have call predecessors, (219), 84 states have return successors, (211), 189 states have call predecessors, (211), 211 states have call successors, (211) [2022-07-13 16:44:36,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1149 transitions. [2022-07-13 16:44:36,208 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1149 transitions. Word has length 120 [2022-07-13 16:44:36,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:44:36,209 INFO L495 AbstractCegarLoop]: Abstraction has 901 states and 1149 transitions. [2022-07-13 16:44:36,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 8 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (34), 8 states have call predecessors, (34), 8 states have call successors, (34) [2022-07-13 16:44:36,209 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1149 transitions. [2022-07-13 16:44:36,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-07-13 16:44:36,210 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:44:36,210 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2022-07-13 16:44:36,227 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 16:44:36,419 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,SelfDestructingSolverStorable16 [2022-07-13 16:44:36,419 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:44:36,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:44:36,420 INFO L85 PathProgramCache]: Analyzing trace with hash -405037921, now seen corresponding path program 3 times [2022-07-13 16:44:36,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:44:36,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757667310] [2022-07-13 16:44:36,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:44:36,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:44:36,434 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:44:36,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881623227] [2022-07-13 16:44:36,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 16:44:36,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:44:36,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:44:36,436 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 16:44:36,437 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 16:44:36,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-13 16:44:36,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 16:44:36,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-13 16:44:36,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:44:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2022-07-13 16:44:36,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:44:56,339 WARN L855 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_main_~p~0#1| 1) (let ((.cse9 (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~B~0#1|))) (let ((.cse6 (= 0 (mod .cse9 2))) (.cse10 (< .cse9 0))) (let ((.cse1 (< |c_ULTIMATE.start_main_~p~0#1| 0)) (.cse5 (not .cse10)) (.cse2 (and .cse10 (not .cse6))) (.cse3 (* (- 1) (div .cse9 2))) (.cse7 (div |c_ULTIMATE.start_main_~p~0#1| 2)) (.cse0 (= (mod |c_ULTIMATE.start_main_~p~0#1| 2) 0))) (and (or (and (not .cse0) .cse1) (let ((.cse4 (* (+ .cse7 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~B~0#1|))) (and (or .cse2 (= |c_ULTIMATE.start_main_~A~0#1| (+ .cse3 |c_ULTIMATE.start_main_~r~0#1| .cse4))) (or .cse5 (= (+ (- 1) .cse3 |c_ULTIMATE.start_main_~r~0#1| .cse4) |c_ULTIMATE.start_main_~A~0#1|) .cse6)))) (or (not .cse1) (let ((.cse8 (* (+ .cse7 1 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~B~0#1|))) (and (or (= (+ (- 1) .cse3 .cse8 |c_ULTIMATE.start_main_~r~0#1|) |c_ULTIMATE.start_main_~A~0#1|) .cse5 .cse6) (or .cse2 (= (+ .cse3 .cse8 |c_ULTIMATE.start_main_~r~0#1|) |c_ULTIMATE.start_main_~A~0#1|)))) .cse0)))))) is different from true