./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/divbin_unwindbound50.i -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 462bdab67ac93ddd789186f30bfdfc189629d2959c27ec219da5960b800d2042 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 14:03:24,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 14:03:24,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 14:03:24,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 14:03:24,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 14:03:24,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 14:03:24,779 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 14:03:24,781 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 14:03:24,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 14:03:24,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 14:03:24,784 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 14:03:24,785 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 14:03:24,786 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 14:03:24,787 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 14:03:24,788 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 14:03:24,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 14:03:24,790 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 14:03:24,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 14:03:24,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 14:03:24,794 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 14:03:24,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 14:03:24,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 14:03:24,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 14:03:24,798 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 14:03:24,800 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 14:03:24,800 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 14:03:24,801 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 14:03:24,801 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 14:03:24,802 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 14:03:24,803 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 14:03:24,803 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 14:03:24,804 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 14:03:24,805 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 14:03:24,806 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 14:03:24,807 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 14:03:24,807 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 14:03:24,808 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 14:03:24,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 14:03:24,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 14:03:24,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 14:03:24,810 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 14:03:24,811 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 14:03:24,829 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 14:03:24,830 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 14:03:24,830 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 14:03:24,830 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 14:03:24,831 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 14:03:24,831 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 14:03:24,832 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 14:03:24,832 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 14:03:24,833 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 14:03:24,833 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 14:03:24,833 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 14:03:24,833 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 14:03:24,834 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 14:03:24,834 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 14:03:24,834 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 14:03:24,835 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 14:03:24,835 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 14:03:24,835 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 14:03:24,835 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 14:03:24,836 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 14:03:24,836 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 14:03:24,836 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 14:03:24,837 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 14:03:24,837 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 14:03:24,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 14:03:24,837 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 14:03:24,838 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 14:03:24,838 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 14:03:24,838 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 14:03:24,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 14:03:24,839 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 14:03:24,839 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 14:03:24,839 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 14:03:24,839 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 14:03:24,840 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 462bdab67ac93ddd789186f30bfdfc189629d2959c27ec219da5960b800d2042 [2021-12-14 14:03:25,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 14:03:25,080 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 14:03:25,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 14:03:25,084 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 14:03:25,087 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 14:03:25,088 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i [2021-12-14 14:03:25,138 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a01183de9/d8465ef7e1d7480498f19f4c346804ae/FLAGd57324b7e [2021-12-14 14:03:25,504 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 14:03:25,505 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i [2021-12-14 14:03:25,512 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a01183de9/d8465ef7e1d7480498f19f4c346804ae/FLAGd57324b7e [2021-12-14 14:03:25,523 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a01183de9/d8465ef7e1d7480498f19f4c346804ae [2021-12-14 14:03:25,526 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 14:03:25,527 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 14:03:25,528 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 14:03:25,528 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 14:03:25,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 14:03:25,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:03:25" (1/1) ... [2021-12-14 14:03:25,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cbfca3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:03:25, skipping insertion in model container [2021-12-14 14:03:25,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:03:25" (1/1) ... [2021-12-14 14:03:25,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 14:03:25,554 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 14:03:25,675 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/divbin_unwindbound50.i[950,963] [2021-12-14 14:03:25,693 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 14:03:25,699 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 14:03:25,709 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/divbin_unwindbound50.i[950,963] [2021-12-14 14:03:25,714 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 14:03:25,731 INFO L208 MainTranslator]: Completed translation [2021-12-14 14:03:25,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:03:25 WrapperNode [2021-12-14 14:03:25,732 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 14:03:25,733 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 14:03:25,734 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 14:03:25,734 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 14:03:25,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:03:25" (1/1) ... [2021-12-14 14:03:25,746 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:03:25" (1/1) ... [2021-12-14 14:03:25,763 INFO L137 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2021-12-14 14:03:25,763 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 14:03:25,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 14:03:25,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 14:03:25,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 14:03:25,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:03:25" (1/1) ... [2021-12-14 14:03:25,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:03:25" (1/1) ... [2021-12-14 14:03:25,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:03:25" (1/1) ... [2021-12-14 14:03:25,779 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:03:25" (1/1) ... [2021-12-14 14:03:25,785 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:03:25" (1/1) ... [2021-12-14 14:03:25,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:03:25" (1/1) ... [2021-12-14 14:03:25,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:03:25" (1/1) ... [2021-12-14 14:03:25,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 14:03:25,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 14:03:25,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 14:03:25,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 14:03:25,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:03:25" (1/1) ... [2021-12-14 14:03:25,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 14:03:25,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:03:25,828 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 14:03:25,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 14:03:25,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 14:03:25,880 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-14 14:03:25,880 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-14 14:03:25,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 14:03:25,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 14:03:25,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 14:03:25,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-14 14:03:25,881 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-14 14:03:25,931 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 14:03:25,932 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 14:03:26,017 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 14:03:26,021 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 14:03:26,022 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-14 14:03:26,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:03:26 BoogieIcfgContainer [2021-12-14 14:03:26,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 14:03:26,025 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 14:03:26,025 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 14:03:26,027 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 14:03:26,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:03:25" (1/3) ... [2021-12-14 14:03:26,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ea9c0b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:03:26, skipping insertion in model container [2021-12-14 14:03:26,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:03:25" (2/3) ... [2021-12-14 14:03:26,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ea9c0b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:03:26, skipping insertion in model container [2021-12-14 14:03:26,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:03:26" (3/3) ... [2021-12-14 14:03:26,030 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound50.i [2021-12-14 14:03:26,034 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 14:03:26,034 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 14:03:26,070 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 14:03:26,076 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 14:03:26,076 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 14:03:26,087 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 14:03:26,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-14 14:03:26,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:03:26,092 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:03:26,092 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:03:26,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:03:26,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1267887399, now seen corresponding path program 1 times [2021-12-14 14:03:26,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:03:26,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322413127] [2021-12-14 14:03:26,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:03:26,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:03:26,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:03:26,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 14:03:26,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:03:26,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 14:03:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:03:26,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 14:03:26,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:03:26,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322413127] [2021-12-14 14:03:26,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322413127] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:03:26,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:03:26,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 14:03:26,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952425085] [2021-12-14 14:03:26,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:03:26,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 14:03:26,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:03:26,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 14:03:26,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 14:03:26,321 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:03:26,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:03:26,334 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2021-12-14 14:03:26,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 14:03:26,336 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-12-14 14:03:26,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:03:26,342 INFO L225 Difference]: With dead ends: 53 [2021-12-14 14:03:26,342 INFO L226 Difference]: Without dead ends: 24 [2021-12-14 14:03:26,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 14:03:26,348 INFO L933 BasicCegarLoop]: 34 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, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:03:26,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:03:26,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-14 14:03:26,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-14 14:03:26,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 14:03:26,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-12-14 14:03:26,377 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 19 [2021-12-14 14:03:26,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:03:26,377 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-12-14 14:03:26,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:03:26,378 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2021-12-14 14:03:26,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-14 14:03:26,379 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:03:26,379 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:03:26,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 14:03:26,380 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:03:26,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:03:26,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1485611193, now seen corresponding path program 1 times [2021-12-14 14:03:26,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:03:26,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537016342] [2021-12-14 14:03:26,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:03:26,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:03:26,399 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 14:03:26,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1842007163] [2021-12-14 14:03:26,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:03:26,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:03:26,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:03:26,402 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:03:26,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 14:03:26,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:03:26,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 14:03:26,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:03:26,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 14:03:26,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:03:26,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:03:26,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537016342] [2021-12-14 14:03:26,557 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 14:03:26,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842007163] [2021-12-14 14:03:26,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842007163] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:03:26,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:03:26,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:03:26,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527139433] [2021-12-14 14:03:26,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:03:26,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 14:03:26,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:03:26,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 14:03:26,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 14:03:26,561 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 14:03:26,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:03:26,576 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-12-14 14:03:26,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 14:03:26,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2021-12-14 14:03:26,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:03:26,577 INFO L225 Difference]: With dead ends: 38 [2021-12-14 14:03:26,578 INFO L226 Difference]: Without dead ends: 26 [2021-12-14 14:03:26,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 14:03:26,580 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 71 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 [2021-12-14 14:03:26,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:03:26,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-14 14:03:26,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-12-14 14:03:26,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 14:03:26,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-12-14 14:03:26,586 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 21 [2021-12-14 14:03:26,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:03:26,587 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-12-14 14:03:26,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 14:03:26,588 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-12-14 14:03:26,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-14 14:03:26,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:03:26,589 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:03:26,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 14:03:26,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:03:26,799 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:03:26,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:03:26,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1580975129, now seen corresponding path program 1 times [2021-12-14 14:03:26,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:03:26,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836516732] [2021-12-14 14:03:26,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:03:26,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:03:26,816 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 14:03:26,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1713140670] [2021-12-14 14:03:26,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:03:26,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:03:26,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:03:26,823 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:03:26,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 14:03:26,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:03:26,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-14 14:03:26,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:03:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 14:03:27,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:03:27,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 14:03:27,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:03:27,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836516732] [2021-12-14 14:03:27,276 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 14:03:27,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713140670] [2021-12-14 14:03:27,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713140670] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-14 14:03:27,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:03:27,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2021-12-14 14:03:27,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546831563] [2021-12-14 14:03:27,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:03:27,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 14:03:27,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:03:27,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 14:03:27,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-14 14:03:27,281 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 14:03:27,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:03:27,402 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2021-12-14 14:03:27,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 14:03:27,402 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2021-12-14 14:03:27,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:03:27,403 INFO L225 Difference]: With dead ends: 38 [2021-12-14 14:03:27,403 INFO L226 Difference]: Without dead ends: 35 [2021-12-14 14:03:27,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-14 14:03:27,405 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:03:27,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 90 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 14:03:27,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-14 14:03:27,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-12-14 14:03:27,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 14:03:27,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-12-14 14:03:27,414 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 22 [2021-12-14 14:03:27,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:03:27,414 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-12-14 14:03:27,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 14:03:27,415 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-12-14 14:03:27,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-14 14:03:27,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:03:27,418 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:03:27,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 14:03:27,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-14 14:03:27,632 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:03:27,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:03:27,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1106421036, now seen corresponding path program 1 times [2021-12-14 14:03:27,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:03:27,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388038480] [2021-12-14 14:03:27,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:03:27,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:03:27,654 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 14:03:27,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2134727371] [2021-12-14 14:03:27,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:03:27,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:03:27,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:03:27,683 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:03:27,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 14:03:27,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:03:27,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-14 14:03:27,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:03:27,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 14:03:27,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:03:27,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 14:03:27,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:03:27,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388038480] [2021-12-14 14:03:27,857 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 14:03:27,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134727371] [2021-12-14 14:03:27,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134727371] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 14:03:27,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 14:03:27,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-12-14 14:03:27,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447589800] [2021-12-14 14:03:27,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 14:03:27,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 14:03:27,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:03:27,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 14:03:27,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:03:27,860 INFO L87 Difference]: Start difference. First operand 35 states and 42 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 14:03:27,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:03:27,938 INFO L93 Difference]: Finished difference Result 69 states and 88 transitions. [2021-12-14 14:03:27,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 14:03:27,938 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2021-12-14 14:03:27,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:03:27,940 INFO L225 Difference]: With dead ends: 69 [2021-12-14 14:03:27,940 INFO L226 Difference]: Without dead ends: 57 [2021-12-14 14:03:27,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-14 14:03:27,941 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 33 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:03:27,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 145 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:03:27,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-14 14:03:27,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 43. [2021-12-14 14:03:27,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 35 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 14:03:27,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2021-12-14 14:03:27,951 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 24 [2021-12-14 14:03:27,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:03:27,952 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2021-12-14 14:03:27,952 INFO L471 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 14:03:27,953 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2021-12-14 14:03:27,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-14 14:03:27,953 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:03:27,954 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:03:27,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 14:03:28,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:03:28,156 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:03:28,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:03:28,156 INFO L85 PathProgramCache]: Analyzing trace with hash -450968108, now seen corresponding path program 1 times [2021-12-14 14:03:28,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:03:28,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644329113] [2021-12-14 14:03:28,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:03:28,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:03:28,170 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 14:03:28,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1183827827] [2021-12-14 14:03:28,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:03:28,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:03:28,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:03:28,172 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:03:28,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 14:03:28,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:03:28,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-14 14:03:28,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:03:28,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 14:03:28,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:03:28,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 14:03:28,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:03:28,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644329113] [2021-12-14 14:03:28,632 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 14:03:28,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183827827] [2021-12-14 14:03:28,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183827827] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-14 14:03:28,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:03:28,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2021-12-14 14:03:28,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295750017] [2021-12-14 14:03:28,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:03:28,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 14:03:28,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:03:28,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 14:03:28,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-14 14:03:28,634 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 14:03:28,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:03:28,662 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2021-12-14 14:03:28,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 14:03:28,663 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-12-14 14:03:28,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:03:28,667 INFO L225 Difference]: With dead ends: 53 [2021-12-14 14:03:28,667 INFO L226 Difference]: Without dead ends: 51 [2021-12-14 14:03:28,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-14 14:03:28,669 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 9 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:03:28,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 138 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 18 Unchecked, 0.0s Time] [2021-12-14 14:03:28,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-14 14:03:28,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-12-14 14:03:28,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 41 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-14 14:03:28,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-12-14 14:03:28,689 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 25 [2021-12-14 14:03:28,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:03:28,689 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-12-14 14:03:28,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 14:03:28,690 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-12-14 14:03:28,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-14 14:03:28,692 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:03:28,692 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:03:28,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 14:03:28,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:03:28,907 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:03:28,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:03:28,908 INFO L85 PathProgramCache]: Analyzing trace with hash -452755568, now seen corresponding path program 1 times [2021-12-14 14:03:28,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:03:28,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982225654] [2021-12-14 14:03:28,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:03:28,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:03:28,926 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 14:03:28,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [576140738] [2021-12-14 14:03:28,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:03:28,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:03:28,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:03:28,928 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:03:28,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 14:03:28,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:03:28,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 14:03:28,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:03:29,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 14:03:29,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:03:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 14:03:29,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:03:29,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982225654] [2021-12-14 14:03:29,085 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 14:03:29,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576140738] [2021-12-14 14:03:29,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576140738] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 14:03:29,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 14:03:29,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-12-14 14:03:29,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435151371] [2021-12-14 14:03:29,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 14:03:29,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 14:03:29,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:03:29,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 14:03:29,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-14 14:03:29,087 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 14:03:29,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:03:29,170 INFO L93 Difference]: Finished difference Result 124 states and 151 transitions. [2021-12-14 14:03:29,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 14:03:29,171 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2021-12-14 14:03:29,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:03:29,172 INFO L225 Difference]: With dead ends: 124 [2021-12-14 14:03:29,172 INFO L226 Difference]: Without dead ends: 117 [2021-12-14 14:03:29,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-14 14:03:29,173 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 68 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:03:29,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 143 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:03:29,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-14 14:03:29,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 110. [2021-12-14 14:03:29,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 84 states have (on average 1.2738095238095237) internal successors, (107), 92 states have internal predecessors, (107), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-14 14:03:29,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 133 transitions. [2021-12-14 14:03:29,191 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 133 transitions. Word has length 25 [2021-12-14 14:03:29,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:03:29,192 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 133 transitions. [2021-12-14 14:03:29,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 14:03:29,192 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 133 transitions. [2021-12-14 14:03:29,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-14 14:03:29,193 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:03:29,193 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:03:29,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 14:03:29,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:03:29,400 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:03:29,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:03:29,400 INFO L85 PathProgramCache]: Analyzing trace with hash -791365823, now seen corresponding path program 1 times [2021-12-14 14:03:29,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:03:29,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527029420] [2021-12-14 14:03:29,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:03:29,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:03:29,410 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 14:03:29,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1065922606] [2021-12-14 14:03:29,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:03:29,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:03:29,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:03:29,412 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:03:29,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 14:03:29,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:03:29,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 14:03:29,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:03:29,577 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 14:03:29,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:03:29,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:03:29,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527029420] [2021-12-14 14:03:29,578 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 14:03:29,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065922606] [2021-12-14 14:03:29,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065922606] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:03:29,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:03:29,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 14:03:29,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416693359] [2021-12-14 14:03:29,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:03:29,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 14:03:29,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:03:29,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 14:03:29,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:03:29,581 INFO L87 Difference]: Start difference. First operand 110 states and 133 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 14:03:29,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:03:29,623 INFO L93 Difference]: Finished difference Result 151 states and 185 transitions. [2021-12-14 14:03:29,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 14:03:29,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-12-14 14:03:29,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:03:29,627 INFO L225 Difference]: With dead ends: 151 [2021-12-14 14:03:29,627 INFO L226 Difference]: Without dead ends: 96 [2021-12-14 14:03:29,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 14:03:29,629 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 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 [2021-12-14 14:03:29,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:03:29,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-14 14:03:29,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-12-14 14:03:29,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 80 states have internal predecessors, (94), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-14 14:03:29,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 116 transitions. [2021-12-14 14:03:29,672 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 116 transitions. Word has length 31 [2021-12-14 14:03:29,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:03:29,673 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 116 transitions. [2021-12-14 14:03:29,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 14:03:29,674 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 116 transitions. [2021-12-14 14:03:29,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-14 14:03:29,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:03:29,676 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:03:29,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 14:03:29,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:03:29,893 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:03:29,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:03:29,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1505101988, now seen corresponding path program 1 times [2021-12-14 14:03:29,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:03:29,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916588108] [2021-12-14 14:03:29,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:03:29,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:03:29,903 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 14:03:29,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773671073] [2021-12-14 14:03:29,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:03:29,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:03:29,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:03:29,905 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:03:29,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 14:03:29,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:03:29,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-14 14:03:29,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:03:30,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-14 14:03:30,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:03:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-14 14:03:30,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:03:30,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916588108] [2021-12-14 14:03:30,119 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 14:03:30,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773671073] [2021-12-14 14:03:30,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773671073] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 14:03:30,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 14:03:30,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-12-14 14:03:30,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226039340] [2021-12-14 14:03:30,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 14:03:30,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 14:03:30,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:03:30,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 14:03:30,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-14 14:03:30,121 INFO L87 Difference]: Start difference. First operand 96 states and 116 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-14 14:03:32,129 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-14 14:03:32,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:03:32,277 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2021-12-14 14:03:32,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 14:03:32,278 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2021-12-14 14:03:32,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:03:32,279 INFO L225 Difference]: With dead ends: 111 [2021-12-14 14:03:32,279 INFO L226 Difference]: Without dead ends: 91 [2021-12-14 14:03:32,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-14 14:03:32,280 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:03:32,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 128 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2021-12-14 14:03:32,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-14 14:03:32,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-12-14 14:03:32,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 76 states have internal predecessors, (88), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-14 14:03:32,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2021-12-14 14:03:32,287 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 31 [2021-12-14 14:03:32,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:03:32,287 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2021-12-14 14:03:32,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-14 14:03:32,287 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2021-12-14 14:03:32,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-14 14:03:32,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:03:32,288 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:03:32,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 14:03:32,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:03:32,489 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:03:32,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:03:32,490 INFO L85 PathProgramCache]: Analyzing trace with hash 675416052, now seen corresponding path program 1 times [2021-12-14 14:03:32,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:03:32,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131613435] [2021-12-14 14:03:32,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:03:32,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:03:32,500 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 14:03:32,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [924319316] [2021-12-14 14:03:32,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:03:32,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:03:32,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:03:32,507 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:03:32,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process