./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/ifcompf.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/array-fpi/ifcompf.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c976745169334e455668d4a00daf76f0c92e9088cf6a3d705adecbf8b82b6740 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 23:17:50,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 23:17:50,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 23:17:50,690 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 23:17:50,694 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 23:17:50,696 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 23:17:50,699 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 23:17:50,701 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 23:17:50,703 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 23:17:50,707 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 23:17:50,708 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 23:17:50,708 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 23:17:50,709 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 23:17:50,710 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 23:17:50,711 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 23:17:50,713 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 23:17:50,714 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 23:17:50,715 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 23:17:50,717 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 23:17:50,720 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 23:17:50,723 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 23:17:50,724 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 23:17:50,725 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 23:17:50,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 23:17:50,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 23:17:50,728 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 23:17:50,729 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 23:17:50,729 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 23:17:50,730 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 23:17:50,730 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 23:17:50,731 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 23:17:50,731 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 23:17:50,733 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 23:17:50,733 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 23:17:50,733 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 23:17:50,734 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 23:17:50,734 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 23:17:50,734 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 23:17:50,735 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 23:17:50,735 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 23:17:50,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 23:17:50,737 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 23:17:50,738 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 23:17:50,761 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 23:17:50,761 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 23:17:50,761 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 23:17:50,762 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 23:17:50,762 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 23:17:50,762 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 23:17:50,763 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 23:17:50,763 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 23:17:50,763 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 23:17:50,764 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 23:17:50,764 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 23:17:50,764 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 23:17:50,764 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 23:17:50,764 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 23:17:50,764 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 23:17:50,764 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 23:17:50,765 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 23:17:50,765 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 23:17:50,765 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 23:17:50,765 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 23:17:50,765 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 23:17:50,765 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 23:17:50,765 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 23:17:50,766 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 23:17:50,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:17:50,766 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 23:17:50,766 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 23:17:50,766 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 23:17:50,766 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 23:17:50,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 23:17:50,767 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 23:17:50,767 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 23:17:50,767 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 23:17:50,767 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c976745169334e455668d4a00daf76f0c92e9088cf6a3d705adecbf8b82b6740 [2022-07-11 23:17:50,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 23:17:50,994 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 23:17:50,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 23:17:50,996 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 23:17:50,997 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 23:17:50,998 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ifcompf.c [2022-07-11 23:17:51,059 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cda6f992/7bff557ae15b42cb904d23d1169f5b2e/FLAG08f675ab9 [2022-07-11 23:17:51,418 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 23:17:51,418 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifcompf.c [2022-07-11 23:17:51,437 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cda6f992/7bff557ae15b42cb904d23d1169f5b2e/FLAG08f675ab9 [2022-07-11 23:17:51,451 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cda6f992/7bff557ae15b42cb904d23d1169f5b2e [2022-07-11 23:17:51,453 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 23:17:51,454 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 23:17:51,455 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 23:17:51,455 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 23:17:51,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 23:17:51,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:17:51" (1/1) ... [2022-07-11 23:17:51,460 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d5882f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:17:51, skipping insertion in model container [2022-07-11 23:17:51,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:17:51" (1/1) ... [2022-07-11 23:17:51,464 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 23:17:51,478 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 23:17:51,597 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/array-fpi/ifcompf.c[590,603] [2022-07-11 23:17:51,614 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:17:51,620 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 23:17:51,628 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/array-fpi/ifcompf.c[590,603] [2022-07-11 23:17:51,635 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:17:51,643 INFO L208 MainTranslator]: Completed translation [2022-07-11 23:17:51,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:17:51 WrapperNode [2022-07-11 23:17:51,644 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 23:17:51,645 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 23:17:51,645 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 23:17:51,645 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 23:17:51,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:17:51" (1/1) ... [2022-07-11 23:17:51,656 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:17:51" (1/1) ... [2022-07-11 23:17:51,670 INFO L137 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 92 [2022-07-11 23:17:51,670 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 23:17:51,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 23:17:51,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 23:17:51,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 23:17:51,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:17:51" (1/1) ... [2022-07-11 23:17:51,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:17:51" (1/1) ... [2022-07-11 23:17:51,682 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:17:51" (1/1) ... [2022-07-11 23:17:51,682 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:17:51" (1/1) ... [2022-07-11 23:17:51,686 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:17:51" (1/1) ... [2022-07-11 23:17:51,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:17:51" (1/1) ... [2022-07-11 23:17:51,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:17:51" (1/1) ... [2022-07-11 23:17:51,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 23:17:51,691 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 23:17:51,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 23:17:51,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 23:17:51,693 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:17:51" (1/1) ... [2022-07-11 23:17:51,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:17:51,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:17:51,718 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-11 23:17:51,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-11 23:17:51,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 23:17:51,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 23:17:51,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 23:17:51,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-11 23:17:51,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 23:17:51,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 23:17:51,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 23:17:51,806 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 23:17:51,807 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 23:17:51,962 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 23:17:51,966 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 23:17:51,966 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-11 23:17:51,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:17:51 BoogieIcfgContainer [2022-07-11 23:17:51,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 23:17:51,969 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 23:17:51,969 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 23:17:51,971 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 23:17:51,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 11:17:51" (1/3) ... [2022-07-11 23:17:51,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9073573 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:17:51, skipping insertion in model container [2022-07-11 23:17:51,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:17:51" (2/3) ... [2022-07-11 23:17:51,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9073573 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:17:51, skipping insertion in model container [2022-07-11 23:17:51,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:17:51" (3/3) ... [2022-07-11 23:17:51,974 INFO L111 eAbstractionObserver]: Analyzing ICFG ifcompf.c [2022-07-11 23:17:51,983 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 23:17:51,983 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 23:17:52,017 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 23:17:52,022 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6152281a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@60c7a142 [2022-07-11 23:17:52,022 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 23:17:52,025 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:17:52,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-11 23:17:52,029 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:17:52,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:17:52,030 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:17:52,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:17:52,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1152450264, now seen corresponding path program 1 times [2022-07-11 23:17:52,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:17:52,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179103650] [2022-07-11 23:17:52,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:17:52,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:17:52,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:17:52,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:17:52,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:17:52,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179103650] [2022-07-11 23:17:52,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179103650] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:17:52,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:17:52,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-11 23:17:52,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058498434] [2022-07-11 23:17:52,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:17:52,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-11 23:17:52,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:17:52,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-11 23:17:52,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 23:17:52,178 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:17:52,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:17:52,192 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2022-07-11 23:17:52,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-11 23:17:52,193 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-11 23:17:52,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:17:52,198 INFO L225 Difference]: With dead ends: 50 [2022-07-11 23:17:52,198 INFO L226 Difference]: Without dead ends: 23 [2022-07-11 23:17:52,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 23:17:52,204 INFO L413 NwaCegarLoop]: 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 [2022-07-11 23:17:52,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:17:52,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-11 23:17:52,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-11 23:17:52,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:17:52,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2022-07-11 23:17:52,225 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 14 [2022-07-11 23:17:52,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:17:52,226 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2022-07-11 23:17:52,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:17:52,226 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2022-07-11 23:17:52,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-11 23:17:52,227 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:17:52,227 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:17:52,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 23:17:52,227 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:17:52,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:17:52,228 INFO L85 PathProgramCache]: Analyzing trace with hash 670750212, now seen corresponding path program 1 times [2022-07-11 23:17:52,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:17:52,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175683176] [2022-07-11 23:17:52,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:17:52,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:17:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:17:52,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:17:52,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:17:52,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175683176] [2022-07-11 23:17:52,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175683176] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:17:52,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:17:52,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:17:52,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144654627] [2022-07-11 23:17:52,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:17:52,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:17:52,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:17:52,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:17:52,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:17:52,313 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:17:52,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:17:52,380 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2022-07-11 23:17:52,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:17:52,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-11 23:17:52,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:17:52,382 INFO L225 Difference]: With dead ends: 56 [2022-07-11 23:17:52,382 INFO L226 Difference]: Without dead ends: 38 [2022-07-11 23:17:52,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:17:52,387 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:17:52,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 19 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:17:52,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-11 23:17:52,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2022-07-11 23:17:52,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:17:52,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-07-11 23:17:52,400 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 14 [2022-07-11 23:17:52,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:17:52,401 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-07-11 23:17:52,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:17:52,402 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-07-11 23:17:52,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-11 23:17:52,405 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:17:52,405 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:17:52,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-11 23:17:52,405 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:17:52,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:17:52,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1978137699, now seen corresponding path program 1 times [2022-07-11 23:17:52,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:17:52,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995873123] [2022-07-11 23:17:52,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:17:52,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:17:52,438 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:17:52,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1230582594] [2022-07-11 23:17:52,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:17:52,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:17:52,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:17:52,441 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:17:52,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 23:17:52,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:17:52,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-11 23:17:52,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:17:52,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-11 23:17:52,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-11 23:17:52,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:17:52,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:17:52,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995873123] [2022-07-11 23:17:52,661 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:17:52,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230582594] [2022-07-11 23:17:52,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230582594] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:17:52,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:17:52,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-11 23:17:52,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497611220] [2022-07-11 23:17:52,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:17:52,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:17:52,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:17:52,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:17:52,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:17:52,663 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:17:52,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:17:52,716 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-07-11 23:17:52,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-11 23:17:52,717 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-11 23:17:52,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:17:52,718 INFO L225 Difference]: With dead ends: 37 [2022-07-11 23:17:52,718 INFO L226 Difference]: Without dead ends: 35 [2022-07-11 23:17:52,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-11 23:17:52,722 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 20 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:17:52,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 66 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:17:52,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-11 23:17:52,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2022-07-11 23:17:52,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:17:52,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-07-11 23:17:52,730 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 23 [2022-07-11 23:17:52,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:17:52,730 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-07-11 23:17:52,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:17:52,731 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-07-11 23:17:52,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-11 23:17:52,731 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:17:52,731 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:17:52,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-11 23:17:52,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:17:52,948 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:17:52,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:17:52,948 INFO L85 PathProgramCache]: Analyzing trace with hash -100913581, now seen corresponding path program 1 times [2022-07-11 23:17:52,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:17:52,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312055345] [2022-07-11 23:17:52,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:17:52,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:17:52,973 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:17:52,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [451942774] [2022-07-11 23:17:52,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:17:52,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:17:52,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:17:52,980 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:17:52,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 23:17:53,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:17:53,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-11 23:17:53,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:17:53,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-11 23:17:53,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:17:53,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-11 23:17:53,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:17:53,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312055345] [2022-07-11 23:17:53,144 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:17:53,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451942774] [2022-07-11 23:17:53,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451942774] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:17:53,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:17:53,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-11 23:17:53,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454238284] [2022-07-11 23:17:53,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:17:53,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 23:17:53,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:17:53,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 23:17:53,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:17:53,149 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:17:53,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:17:53,287 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2022-07-11 23:17:53,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:17:53,287 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-11 23:17:53,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:17:53,288 INFO L225 Difference]: With dead ends: 87 [2022-07-11 23:17:53,288 INFO L226 Difference]: Without dead ends: 51 [2022-07-11 23:17:53,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:17:53,289 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:17:53,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 43 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:17:53,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-11 23:17:53,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 37. [2022-07-11 23:17:53,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:17:53,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-07-11 23:17:53,293 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2022-07-11 23:17:53,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:17:53,293 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-07-11 23:17:53,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:17:53,294 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-07-11 23:17:53,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-11 23:17:53,294 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:17:53,295 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1] [2022-07-11 23:17:53,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-11 23:17:53,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-11 23:17:53,508 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:17:53,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:17:53,508 INFO L85 PathProgramCache]: Analyzing trace with hash -2051071008, now seen corresponding path program 1 times [2022-07-11 23:17:53,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:17:53,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081880780] [2022-07-11 23:17:53,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:17:53,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:17:53,530 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:17:53,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [989970114] [2022-07-11 23:17:53,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:17:53,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:17:53,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:17:53,532 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:17:53,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 23:17:53,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:17:53,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-11 23:17:53,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:17:53,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 94 [2022-07-11 23:17:53,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-11 23:17:53,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:17:53,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-11 23:17:53,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-11 23:17:53,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:17:53,871 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-11 23:17:53,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2022-07-11 23:17:53,996 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-11 23:17:53,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 30 [2022-07-11 23:17:54,006 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-11 23:17:54,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:17:56,215 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_48| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_48|)) (forall ((v_ArrVal_128 Int)) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_48| 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_128)))) (store .cse0 |c_ULTIMATE.start_main_~c~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset| 0))) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)))) is different from false [2022-07-11 23:17:56,296 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 1 not checked. [2022-07-11 23:17:56,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:17:56,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081880780] [2022-07-11 23:17:56,297 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:17:56,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989970114] [2022-07-11 23:17:56,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989970114] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:17:56,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:17:56,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2022-07-11 23:17:56,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11411567] [2022-07-11 23:17:56,298 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:17:56,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-11 23:17:56,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:17:56,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-11 23:17:56,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=443, Unknown=1, NotChecked=44, Total=600 [2022-07-11 23:17:56,299 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:17:58,350 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_48| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_48|)) (forall ((v_ArrVal_128 Int)) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_48| 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_128)))) (store .cse0 |c_ULTIMATE.start_main_~c~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset| 0))) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)))) (= |c_ULTIMATE.start_main_~i~0#1| 0) (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (= |c_ULTIMATE.start_main_~c~0#1.offset| 0) (not (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~c~0#1.base|))) is different from false [2022-07-11 23:17:58,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:17:58,780 INFO L93 Difference]: Finished difference Result 83 states and 99 transitions. [2022-07-11 23:17:58,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-11 23:17:58,782 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-11 23:17:58,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:17:58,782 INFO L225 Difference]: With dead ends: 83 [2022-07-11 23:17:58,782 INFO L226 Difference]: Without dead ends: 61 [2022-07-11 23:17:58,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=189, Invalid=809, Unknown=2, NotChecked=122, Total=1122 [2022-07-11 23:17:58,783 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:17:58,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 85 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 216 Invalid, 0 Unknown, 87 Unchecked, 0.3s Time] [2022-07-11 23:17:58,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-11 23:17:58,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 48. [2022-07-11 23:17:58,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:17:58,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-07-11 23:17:58,789 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 36 [2022-07-11 23:17:58,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:17:58,789 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-07-11 23:17:58,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:17:58,790 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-07-11 23:17:58,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-11 23:17:58,790 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:17:58,790 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:17:58,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-11 23:17:59,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:17:59,003 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:17:59,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:17:59,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1866238698, now seen corresponding path program 2 times [2022-07-11 23:17:59,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:17:59,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699757404] [2022-07-11 23:17:59,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:17:59,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:17:59,020 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:17:59,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1736330091] [2022-07-11 23:17:59,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:17:59,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:17:59,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:17:59,022 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:17:59,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 23:17:59,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:17:59,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:17:59,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-11 23:17:59,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:17:59,149 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-11 23:17:59,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:17:59,200 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-11 23:17:59,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:17:59,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699757404] [2022-07-11 23:17:59,200 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:17:59,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736330091] [2022-07-11 23:17:59,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736330091] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:17:59,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:17:59,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-07-11 23:17:59,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419616124] [2022-07-11 23:17:59,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:17:59,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-11 23:17:59,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:17:59,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-11 23:17:59,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:17:59,202 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:17:59,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:17:59,403 INFO L93 Difference]: Finished difference Result 151 states and 174 transitions. [2022-07-11 23:17:59,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-11 23:17:59,404 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-11 23:17:59,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:17:59,405 INFO L225 Difference]: With dead ends: 151 [2022-07-11 23:17:59,405 INFO L226 Difference]: Without dead ends: 92 [2022-07-11 23:17:59,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-07-11 23:17:59,406 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 114 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:17:59,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 69 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 23:17:59,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-11 23:17:59,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 66. [2022-07-11 23:17:59,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 65 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:17:59,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2022-07-11 23:17:59,429 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 40 [2022-07-11 23:17:59,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:17:59,430 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2022-07-11 23:17:59,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:17:59,430 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2022-07-11 23:17:59,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-11 23:17:59,431 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:17:59,431 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:17:59,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-11 23:17:59,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:17:59,647 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:17:59,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:17:59,648 INFO L85 PathProgramCache]: Analyzing trace with hash -175718331, now seen corresponding path program 3 times [2022-07-11 23:17:59,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:17:59,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363128718] [2022-07-11 23:17:59,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:17:59,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:17:59,668 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:17:59,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817791813] [2022-07-11 23:17:59,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:17:59,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:17:59,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:17:59,670 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:17:59,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-11 23:17:59,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-11 23:17:59,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:17:59,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-11 23:17:59,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:17:59,808 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-11 23:17:59,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:17:59,845 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-11 23:17:59,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:17:59,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363128718] [2022-07-11 23:17:59,845 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:17:59,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817791813] [2022-07-11 23:17:59,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817791813] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:17:59,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:17:59,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-07-11 23:17:59,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285746219] [2022-07-11 23:17:59,846 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:17:59,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-11 23:17:59,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:17:59,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-11 23:17:59,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:17:59,848 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:17:59,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:17:59,993 INFO L93 Difference]: Finished difference Result 121 states and 138 transitions. [2022-07-11 23:17:59,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-11 23:17:59,993 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-11 23:17:59,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:17:59,994 INFO L225 Difference]: With dead ends: 121 [2022-07-11 23:17:59,994 INFO L226 Difference]: Without dead ends: 62 [2022-07-11 23:17:59,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-07-11 23:17:59,995 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 128 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:17:59,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 46 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:17:59,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-11 23:17:59,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 50. [2022-07-11 23:17:59,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:17:59,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-07-11 23:18:00,000 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 48 [2022-07-11 23:18:00,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:18:00,000 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-07-11 23:18:00,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:18:00,000 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-07-11 23:18:00,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-11 23:18:00,001 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:18:00,001 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:18:00,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-11 23:18:00,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:18:00,207 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:18:00,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:18:00,208 INFO L85 PathProgramCache]: Analyzing trace with hash 132233513, now seen corresponding path program 4 times [2022-07-11 23:18:00,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:18:00,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612352039] [2022-07-11 23:18:00,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:18:00,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:18:00,230 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:18:00,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1958968788] [2022-07-11 23:18:00,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 23:18:00,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:18:00,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:18:00,244 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:18:00,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-11 23:18:00,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 23:18:00,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-07-11 23:18:00,315 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-11 23:18:00,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-11 23:18:00,364 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-11 23:18:00,364 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-11 23:18:00,365 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-11 23:18:00,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-11 23:18:00,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:18:00,569 INFO L356 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1] [2022-07-11 23:18:00,572 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-11 23:18:00,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.07 11:18:00 BoogieIcfgContainer [2022-07-11 23:18:00,603 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-11 23:18:00,603 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-11 23:18:00,604 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-11 23:18:00,604 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-11 23:18:00,604 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:17:51" (3/4) ... [2022-07-11 23:18:00,605 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-11 23:18:00,639 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-11 23:18:00,639 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-11 23:18:00,640 INFO L158 Benchmark]: Toolchain (without parser) took 9185.64ms. Allocated memory was 102.8MB in the beginning and 172.0MB in the end (delta: 69.2MB). Free memory was 71.0MB in the beginning and 73.0MB in the end (delta: -2.0MB). Peak memory consumption was 67.4MB. Max. memory is 16.1GB. [2022-07-11 23:18:00,640 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 102.8MB. Free memory is still 59.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-11 23:18:00,640 INFO L158 Benchmark]: CACSL2BoogieTranslator took 188.72ms. Allocated memory was 102.8MB in the beginning and 142.6MB in the end (delta: 39.8MB). Free memory was 70.8MB in the beginning and 116.7MB in the end (delta: -46.0MB). Peak memory consumption was 9.5MB. Max. memory is 16.1GB. [2022-07-11 23:18:00,641 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.58ms. Allocated memory is still 142.6MB. Free memory was 116.7MB in the beginning and 114.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-11 23:18:00,641 INFO L158 Benchmark]: Boogie Preprocessor took 20.06ms. Allocated memory is still 142.6MB. Free memory was 114.7MB in the beginning and 113.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-11 23:18:00,641 INFO L158 Benchmark]: RCFGBuilder took 276.58ms. Allocated memory is still 142.6MB. Free memory was 113.5MB in the beginning and 101.5MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-11 23:18:00,641 INFO L158 Benchmark]: TraceAbstraction took 8634.05ms. Allocated memory was 142.6MB in the beginning and 172.0MB in the end (delta: 29.4MB). Free memory was 100.9MB in the beginning and 77.2MB in the end (delta: 23.7MB). Peak memory consumption was 53.7MB. Max. memory is 16.1GB. [2022-07-11 23:18:00,641 INFO L158 Benchmark]: Witness Printer took 36.09ms. Allocated memory is still 172.0MB. Free memory was 77.2MB in the beginning and 73.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-11 23:18:00,643 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 102.8MB. Free memory is still 59.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 188.72ms. Allocated memory was 102.8MB in the beginning and 142.6MB in the end (delta: 39.8MB). Free memory was 70.8MB in the beginning and 116.7MB in the end (delta: -46.0MB). Peak memory consumption was 9.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.58ms. Allocated memory is still 142.6MB. Free memory was 116.7MB in the beginning and 114.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.06ms. Allocated memory is still 142.6MB. Free memory was 114.7MB in the beginning and 113.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 276.58ms. Allocated memory is still 142.6MB. Free memory was 113.5MB in the beginning and 101.5MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 8634.05ms. Allocated memory was 142.6MB in the beginning and 172.0MB in the end (delta: 29.4MB). Free memory was 100.9MB in the beginning and 77.2MB in the end (delta: 23.7MB). Peak memory consumption was 53.7MB. Max. memory is 16.1GB. * Witness Printer took 36.09ms. Allocated memory is still 172.0MB. Free memory was 77.2MB in the beginning and 73.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, N=3] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L30] long long *c = malloc(sizeof(long long)*N); [L32] i=0 VAL [a={-1:0}, b={-2:0}, c={4:0}, i=0, N=3] [L32] COND TRUE i