/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/reducercommutativity/rangesum20.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 14:28:27,558 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 14:28:27,560 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 14:28:27,598 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 14:28:27,598 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 14:28:27,601 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 14:28:27,604 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 14:28:27,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 14:28:27,607 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 14:28:27,612 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 14:28:27,613 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 14:28:27,615 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 14:28:27,615 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 14:28:27,617 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 14:28:27,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 14:28:27,619 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 14:28:27,620 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 14:28:27,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 14:28:27,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 14:28:27,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 14:28:27,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 14:28:27,629 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 14:28:27,629 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 14:28:27,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 14:28:27,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 14:28:27,639 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 14:28:27,639 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 14:28:27,640 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 14:28:27,641 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 14:28:27,641 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 14:28:27,641 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 14:28:27,642 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 14:28:27,643 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 14:28:27,644 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 14:28:27,644 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 14:28:27,645 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 14:28:27,645 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 14:28:27,645 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 14:28:27,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 14:28:27,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 14:28:27,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 14:28:27,648 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 14:28:27,677 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 14:28:27,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 14:28:27,677 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 14:28:27,678 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 14:28:27,678 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 14:28:27,679 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 14:28:27,679 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 14:28:27,679 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 14:28:27,679 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 14:28:27,679 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 14:28:27,680 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 14:28:27,680 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 14:28:27,680 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 14:28:27,680 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 14:28:27,680 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 14:28:27,681 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 14:28:27,681 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 14:28:27,681 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 14:28:27,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 14:28:27,682 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 14:28:27,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 14:28:27,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 14:28:27,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 14:28:27,682 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 14:28:27,682 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 14:28:27,682 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 14:28:27,683 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 14:28:27,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 14:28:27,683 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 14:28:27,683 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 14:28:27,683 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 14:28:27,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 14:28:27,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:28:27,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 14:28:27,684 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 14:28:27,684 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 14:28:27,684 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 14:28:27,685 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 14:28:27,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 14:28:27,685 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 14:28:27,685 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 14:28:27,685 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 14:28:27,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 14:28:27,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 14:28:27,916 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 14:28:27,917 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 14:28:27,918 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 14:28:27,919 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum20.i [2023-04-02 14:28:29,103 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 14:28:29,288 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 14:28:29,289 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum20.i [2023-04-02 14:28:29,295 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86758f94c/4ff013483a734ae5af2041f0ca248d70/FLAGb9baef720 [2023-04-02 14:28:29,310 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86758f94c/4ff013483a734ae5af2041f0ca248d70 [2023-04-02 14:28:29,313 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 14:28:29,314 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 14:28:29,317 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 14:28:29,317 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 14:28:29,319 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 14:28:29,320 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:28:29" (1/1) ... [2023-04-02 14:28:29,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34645744 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:28:29, skipping insertion in model container [2023-04-02 14:28:29,322 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:28:29" (1/1) ... [2023-04-02 14:28:29,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 14:28:29,343 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 14:28:29,476 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum20.i[1465,1478] [2023-04-02 14:28:29,480 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:28:29,487 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 14:28:29,505 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum20.i[1465,1478] [2023-04-02 14:28:29,506 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:28:29,517 INFO L208 MainTranslator]: Completed translation [2023-04-02 14:28:29,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:28:29 WrapperNode [2023-04-02 14:28:29,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 14:28:29,519 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 14:28:29,519 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 14:28:29,519 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 14:28:29,529 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:28:29" (1/1) ... [2023-04-02 14:28:29,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:28:29" (1/1) ... [2023-04-02 14:28:29,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:28:29" (1/1) ... [2023-04-02 14:28:29,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:28:29" (1/1) ... [2023-04-02 14:28:29,540 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:28:29" (1/1) ... [2023-04-02 14:28:29,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:28:29" (1/1) ... [2023-04-02 14:28:29,545 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:28:29" (1/1) ... [2023-04-02 14:28:29,546 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:28:29" (1/1) ... [2023-04-02 14:28:29,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 14:28:29,549 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 14:28:29,549 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 14:28:29,549 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 14:28:29,550 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:28:29" (1/1) ... [2023-04-02 14:28:29,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:28:29,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:28:29,574 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) [2023-04-02 14:28:29,578 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 [2023-04-02 14:28:29,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 14:28:29,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 14:28:29,617 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 14:28:29,617 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2023-04-02 14:28:29,617 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2023-04-02 14:28:29,617 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 14:28:29,617 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 14:28:29,617 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 14:28:29,617 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 14:28:29,618 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 14:28:29,618 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 14:28:29,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 14:28:29,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 14:28:29,618 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2023-04-02 14:28:29,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 14:28:29,618 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2023-04-02 14:28:29,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 14:28:29,618 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 14:28:29,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 14:28:29,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 14:28:29,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 14:28:29,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 14:28:29,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 14:28:29,696 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 14:28:29,698 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 14:28:29,867 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 14:28:29,926 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 14:28:29,926 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-02 14:28:29,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:28:29 BoogieIcfgContainer [2023-04-02 14:28:29,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 14:28:29,930 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 14:28:29,930 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 14:28:29,933 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 14:28:29,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:28:29" (1/3) ... [2023-04-02 14:28:29,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b0cb59d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:28:29, skipping insertion in model container [2023-04-02 14:28:29,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:28:29" (2/3) ... [2023-04-02 14:28:29,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b0cb59d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:28:29, skipping insertion in model container [2023-04-02 14:28:29,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:28:29" (3/3) ... [2023-04-02 14:28:29,935 INFO L112 eAbstractionObserver]: Analyzing ICFG rangesum20.i [2023-04-02 14:28:29,950 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 14:28:29,950 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 14:28:29,990 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 14:28:29,995 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=FINITE_AUTOMATA, 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7aebf06f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 14:28:29,996 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 14:28:30,006 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 14:28:30,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-02 14:28:30,013 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:28:30,019 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:28:30,020 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:28:30,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:28:30,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1265445411, now seen corresponding path program 1 times [2023-04-02 14:28:30,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:28:30,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477715318] [2023-04-02 14:28:30,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:28:30,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:28:30,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:28:30,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:28:30,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477715318] [2023-04-02 14:28:30,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-02 14:28:30,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469171986] [2023-04-02 14:28:30,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:28:30,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:28:30,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:28:30,193 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) [2023-04-02 14:28:30,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 14:28:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:28:30,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-02 14:28:30,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:28:30,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-02 14:28:30,336 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 14:28:30,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469171986] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:28:30,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:28:30,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 14:28:30,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789157815] [2023-04-02 14:28:30,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:28:30,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 14:28:30,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:28:30,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 14:28:30,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:28:30,371 INFO L87 Difference]: Start difference. First operand has 27 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 14:28:30,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:28:30,407 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2023-04-02 14:28:30,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 14:28:30,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 28 [2023-04-02 14:28:30,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:28:30,418 INFO L225 Difference]: With dead ends: 47 [2023-04-02 14:28:30,419 INFO L226 Difference]: Without dead ends: 24 [2023-04-02 14:28:30,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:28:30,424 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:28:30,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:28:30,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-02 14:28:30,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-04-02 14:28:30,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 14:28:30,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-04-02 14:28:30,474 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2023-04-02 14:28:30,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:28:30,474 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-04-02 14:28:30,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 14:28:30,474 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-04-02 14:28:30,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 14:28:30,476 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:28:30,476 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:28:30,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 14:28:30,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-02 14:28:30,683 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:28:30,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:28:30,684 INFO L85 PathProgramCache]: Analyzing trace with hash 2029022752, now seen corresponding path program 1 times [2023-04-02 14:28:30,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:28:30,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477802417] [2023-04-02 14:28:30,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:28:30,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:28:30,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:28:30,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:28:30,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477802417] [2023-04-02 14:28:30,734 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-02 14:28:30,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534012196] [2023-04-02 14:28:30,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:28:30,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:28:30,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:28:30,736 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) [2023-04-02 14:28:30,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 14:28:30,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:28:30,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-02 14:28:30,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:28:30,863 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 14:28:30,863 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 14:28:30,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534012196] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:28:30,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:28:30,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 14:28:30,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045345830] [2023-04-02 14:28:30,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:28:30,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 14:28:30,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:28:30,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 14:28:30,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:28:30,866 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 14:28:30,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:28:30,900 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2023-04-02 14:28:30,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 14:28:30,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 29 [2023-04-02 14:28:30,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:28:30,903 INFO L225 Difference]: With dead ends: 37 [2023-04-02 14:28:30,903 INFO L226 Difference]: Without dead ends: 25 [2023-04-02 14:28:30,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:28:30,904 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:28:30,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:28:30,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-02 14:28:30,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-04-02 14:28:30,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 14:28:30,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-04-02 14:28:30,910 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2023-04-02 14:28:30,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:28:30,910 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-04-02 14:28:30,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 14:28:30,911 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-04-02 14:28:30,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-02 14:28:30,911 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:28:30,911 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:28:30,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 14:28:31,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-02 14:28:31,113 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:28:31,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:28:31,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1530991488, now seen corresponding path program 1 times [2023-04-02 14:28:31,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:28:31,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214244293] [2023-04-02 14:28:31,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:28:31,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:28:31,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:28:31,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:28:31,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214244293] [2023-04-02 14:28:31,191 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-02 14:28:31,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318296062] [2023-04-02 14:28:31,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:28:31,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:28:31,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:28:31,198 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) [2023-04-02 14:28:31,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 14:28:31,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:28:31,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-02 14:28:31,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:28:31,289 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:28:31,289 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 14:28:31,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318296062] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:28:31,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:28:31,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 14:28:31,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705005543] [2023-04-02 14:28:31,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:28:31,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 14:28:31,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:28:31,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 14:28:31,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:28:31,292 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 14:28:31,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:28:31,308 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2023-04-02 14:28:31,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 14:28:31,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2023-04-02 14:28:31,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:28:31,309 INFO L225 Difference]: With dead ends: 35 [2023-04-02 14:28:31,310 INFO L226 Difference]: Without dead ends: 26 [2023-04-02 14:28:31,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:28:31,311 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:28:31,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:28:31,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-02 14:28:31,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-04-02 14:28:31,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 14:28:31,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-04-02 14:28:31,317 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2023-04-02 14:28:31,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:28:31,318 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-04-02 14:28:31,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 14:28:31,318 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-04-02 14:28:31,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-02 14:28:31,319 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:28:31,319 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:28:31,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 14:28:31,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:28:31,525 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:28:31,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:28:31,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1156130694, now seen corresponding path program 1 times [2023-04-02 14:28:31,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:28:31,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351360617] [2023-04-02 14:28:31,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:28:31,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:28:31,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:28:31,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:28:31,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351360617] [2023-04-02 14:28:31,592 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-02 14:28:31,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328759349] [2023-04-02 14:28:31,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:28:31,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:28:31,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:28:31,600 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) [2023-04-02 14:28:31,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 14:28:31,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:28:31,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 14:28:31,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:28:31,730 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-02 14:28:31,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:28:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-02 14:28:31,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328759349] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:28:31,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [559716819] [2023-04-02 14:28:31,787 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-04-02 14:28:31,787 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:28:31,790 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:28:31,794 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:28:31,794 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:28:31,868 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:28:36,220 INFO L197 IcfgInterpreter]: Interpreting procedure init_nondet with input of size 32 for LOIs [2023-04-02 14:28:36,254 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 19 for LOIs [2023-04-02 14:28:36,706 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:28:36,710 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:28:38,284 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '797#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 19 main_~i~2) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-02 14:28:38,284 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:28:38,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:28:38,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-04-02 14:28:38,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960098492] [2023-04-02 14:28:38,285 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:28:38,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 14:28:38,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:28:38,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 14:28:38,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=496, Unknown=8, NotChecked=0, Total=600 [2023-04-02 14:28:38,287 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 14:28:38,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:28:38,316 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2023-04-02 14:28:38,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 14:28:38,317 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 33 [2023-04-02 14:28:38,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:28:38,318 INFO L225 Difference]: With dead ends: 46 [2023-04-02 14:28:38,318 INFO L226 Difference]: Without dead ends: 29 [2023-04-02 14:28:38,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=96, Invalid=496, Unknown=8, NotChecked=0, Total=600 [2023-04-02 14:28:38,319 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:28:38,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:28:38,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-02 14:28:38,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-04-02 14:28:38,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 14:28:38,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-04-02 14:28:38,324 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 33 [2023-04-02 14:28:38,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:28:38,324 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-04-02 14:28:38,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 14:28:38,324 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-04-02 14:28:38,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-02 14:28:38,325 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:28:38,325 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:28:38,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 14:28:38,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:28:38,532 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:28:38,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:28:38,532 INFO L85 PathProgramCache]: Analyzing trace with hash 526655817, now seen corresponding path program 2 times [2023-04-02 14:28:38,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:28:38,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703716655] [2023-04-02 14:28:38,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:28:38,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:28:38,553 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:28:38,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013544763] [2023-04-02 14:28:38,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:28:38,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:28:38,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:28:38,555 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) [2023-04-02 14:28:38,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 14:28:38,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 14:28:38,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:28:38,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 14:28:38,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:28:38,652 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-02 14:28:38,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:28:38,677 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-02 14:28:38,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:28:38,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703716655] [2023-04-02 14:28:38,677 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:28:38,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013544763] [2023-04-02 14:28:38,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013544763] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:28:38,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1153724652] [2023-04-02 14:28:38,681 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-04-02 14:28:38,681 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:28:38,682 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:28:38,682 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:28:38,682 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:28:38,702 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:28:41,348 INFO L197 IcfgInterpreter]: Interpreting procedure init_nondet with input of size 32 for LOIs [2023-04-02 14:28:41,378 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 19 for LOIs [2023-04-02 14:28:41,662 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:28:41,667 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:28:43,087 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1156#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 19 main_~i~2) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-02 14:28:43,087 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:28:43,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:28:43,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-04-02 14:28:43,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974792419] [2023-04-02 14:28:43,087 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:28:43,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 14:28:43,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:28:43,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 14:28:43,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=496, Unknown=8, NotChecked=0, Total=600 [2023-04-02 14:28:43,089 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 14:28:43,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:28:43,116 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2023-04-02 14:28:43,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 14:28:43,117 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36 [2023-04-02 14:28:43,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:28:43,117 INFO L225 Difference]: With dead ends: 46 [2023-04-02 14:28:43,117 INFO L226 Difference]: Without dead ends: 32 [2023-04-02 14:28:43,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=96, Invalid=496, Unknown=8, NotChecked=0, Total=600 [2023-04-02 14:28:43,118 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:28:43,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:28:43,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-02 14:28:43,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-04-02 14:28:43,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 14:28:43,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-04-02 14:28:43,122 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 36 [2023-04-02 14:28:43,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:28:43,122 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-04-02 14:28:43,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 14:28:43,122 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-04-02 14:28:43,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-02 14:28:43,123 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:28:43,123 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:28:43,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 14:28:43,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:28:43,324 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:28:43,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:28:43,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1232812885, now seen corresponding path program 3 times [2023-04-02 14:28:43,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:28:43,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141888519] [2023-04-02 14:28:43,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:28:43,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:28:43,344 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:28:43,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [324688865] [2023-04-02 14:28:43,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:28:43,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:28:43,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:28:43,346 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) [2023-04-02 14:28:43,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 14:28:43,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:28:43,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:28:43,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 14:28:43,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:28:43,470 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-02 14:28:43,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:28:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-02 14:28:43,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:28:43,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141888519] [2023-04-02 14:28:43,536 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:28:43,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324688865] [2023-04-02 14:28:43,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324688865] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:28:43,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [710959953] [2023-04-02 14:28:43,540 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-04-02 14:28:43,540 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:28:43,541 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:28:43,541 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:28:43,541 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:28:43,555 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:28:46,059 INFO L197 IcfgInterpreter]: Interpreting procedure init_nondet with input of size 32 for LOIs [2023-04-02 14:28:46,087 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 19 for LOIs [2023-04-02 14:28:46,320 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:28:46,325 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:28:47,982 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1583#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 19 main_~i~2) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-02 14:28:47,982 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:28:47,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:28:47,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-04-02 14:28:47,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701027397] [2023-04-02 14:28:47,982 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:28:47,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 14:28:47,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:28:47,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 14:28:47,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=775, Unknown=8, NotChecked=0, Total=930 [2023-04-02 14:28:47,984 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 14:28:48,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:28:48,030 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2023-04-02 14:28:48,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 14:28:48,030 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 45 [2023-04-02 14:28:48,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:28:48,031 INFO L225 Difference]: With dead ends: 58 [2023-04-02 14:28:48,032 INFO L226 Difference]: Without dead ends: 38 [2023-04-02 14:28:48,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=147, Invalid=775, Unknown=8, NotChecked=0, Total=930 [2023-04-02 14:28:48,035 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:28:48,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:28:48,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-04-02 14:28:48,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-04-02 14:28:48,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 14:28:48,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2023-04-02 14:28:48,049 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 45 [2023-04-02 14:28:48,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:28:48,051 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2023-04-02 14:28:48,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 14:28:48,051 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2023-04-02 14:28:48,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-02 14:28:48,054 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:28:48,054 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:28:48,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 14:28:48,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:28:48,262 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:28:48,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:28:48,263 INFO L85 PathProgramCache]: Analyzing trace with hash 508565963, now seen corresponding path program 4 times [2023-04-02 14:28:48,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:28:48,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143315113] [2023-04-02 14:28:48,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:28:48,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:28:48,305 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:28:48,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [640214874] [2023-04-02 14:28:48,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:28:48,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:28:48,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:28:48,313 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:28:48,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 14:28:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:28:48,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 14:28:48,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:28:48,489 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-02 14:28:48,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:28:48,689 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-02 14:28:48,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:28:48,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143315113] [2023-04-02 14:28:48,689 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:28:48,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640214874] [2023-04-02 14:28:48,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640214874] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:28:48,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [107513766] [2023-04-02 14:28:48,691 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-04-02 14:28:48,692 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:28:48,692 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:28:48,692 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:28:48,692 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:28:48,721 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:28:51,051 INFO L197 IcfgInterpreter]: Interpreting procedure init_nondet with input of size 32 for LOIs [2023-04-02 14:28:51,075 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 19 for LOIs [2023-04-02 14:28:51,344 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:28:51,346 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:28:52,873 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2090#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 19 main_~i~2) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-02 14:28:52,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:28:52,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:28:52,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2023-04-02 14:28:52,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729277156] [2023-04-02 14:28:52,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:28:52,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-02 14:28:52,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:28:52,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-02 14:28:52,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=1320, Unknown=8, NotChecked=0, Total=1640 [2023-04-02 14:28:52,876 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 14:28:52,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:28:52,926 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2023-04-02 14:28:52,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-02 14:28:52,927 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2023-04-02 14:28:52,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:28:52,928 INFO L225 Difference]: With dead ends: 68 [2023-04-02 14:28:52,928 INFO L226 Difference]: Without dead ends: 48 [2023-04-02 14:28:52,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=312, Invalid=1320, Unknown=8, NotChecked=0, Total=1640 [2023-04-02 14:28:52,929 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:28:52,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 96 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:28:52,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-04-02 14:28:52,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-04-02 14:28:52,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 14:28:52,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2023-04-02 14:28:52,934 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 51 [2023-04-02 14:28:52,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:28:52,935 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2023-04-02 14:28:52,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 14:28:52,935 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2023-04-02 14:28:52,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-02 14:28:52,935 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:28:52,936 INFO L195 NwaCegarLoop]: trace histogram [20, 12, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:28:52,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 14:28:53,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:28:53,142 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:28:53,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:28:53,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1100626005, now seen corresponding path program 5 times [2023-04-02 14:28:53,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:28:53,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972241542] [2023-04-02 14:28:53,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:28:53,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:28:53,181 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:28:53,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [906208693] [2023-04-02 14:28:53,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:28:53,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:28:53,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:28:53,183 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:28:53,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 14:28:53,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 14:28:53,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:28:53,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 14:28:53,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:28:53,355 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2023-04-02 14:28:53,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:28:53,385 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2023-04-02 14:28:53,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:28:53,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972241542] [2023-04-02 14:28:53,385 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:28:53,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906208693] [2023-04-02 14:28:53,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906208693] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:28:53,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1828788139] [2023-04-02 14:28:53,389 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-04-02 14:28:53,389 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:28:53,389 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:28:53,389 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:28:53,389 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:28:53,420 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:28:55,603 INFO L197 IcfgInterpreter]: Interpreting procedure init_nondet with input of size 32 for LOIs [2023-04-02 14:28:55,627 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 19 for LOIs [2023-04-02 14:28:55,861 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:28:55,863 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:28:57,029 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2681#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 19 main_~i~2) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-02 14:28:57,029 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:28:57,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:28:57,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-04-02 14:28:57,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422571398] [2023-04-02 14:28:57,029 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:28:57,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 14:28:57,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:28:57,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 14:28:57,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=496, Unknown=8, NotChecked=0, Total=600 [2023-04-02 14:28:57,031 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 14:28:57,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:28:57,050 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2023-04-02 14:28:57,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 14:28:57,052 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 61 [2023-04-02 14:28:57,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:28:57,052 INFO L225 Difference]: With dead ends: 63 [2023-04-02 14:28:57,052 INFO L226 Difference]: Without dead ends: 51 [2023-04-02 14:28:57,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=96, Invalid=496, Unknown=8, NotChecked=0, Total=600 [2023-04-02 14:28:57,053 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:28:57,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:28:57,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-04-02 14:28:57,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-04-02 14:28:57,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 14:28:57,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2023-04-02 14:28:57,058 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 61 [2023-04-02 14:28:57,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:28:57,058 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2023-04-02 14:28:57,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 14:28:57,058 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2023-04-02 14:28:57,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-02 14:28:57,059 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:28:57,059 INFO L195 NwaCegarLoop]: trace histogram [20, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:28:57,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 14:28:57,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-02 14:28:57,266 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:28:57,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:28:57,266 INFO L85 PathProgramCache]: Analyzing trace with hash 783204579, now seen corresponding path program 6 times [2023-04-02 14:28:57,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:28:57,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538499224] [2023-04-02 14:28:57,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:28:57,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:28:57,309 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:28:57,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [419415159] [2023-04-02 14:28:57,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:28:57,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:28:57,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:28:57,321 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:28:57,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 14:28:57,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:28:57,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:28:57,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 14:28:57,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:28:57,461 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2023-04-02 14:28:57,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:28:57,515 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2023-04-02 14:28:57,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:28:57,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538499224] [2023-04-02 14:28:57,516 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:28:57,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419415159] [2023-04-02 14:28:57,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419415159] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:28:57,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1627218055] [2023-04-02 14:28:57,520 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-04-02 14:28:57,520 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:28:57,521 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:28:57,521 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:28:57,521 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:28:57,532 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:28:59,469 INFO L197 IcfgInterpreter]: Interpreting procedure init_nondet with input of size 32 for LOIs [2023-04-02 14:28:59,493 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 19 for LOIs [2023-04-02 14:28:59,703 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:28:59,710 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:29:00,934 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3296#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 19 main_~i~2) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-02 14:29:00,934 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:29:00,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:29:00,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-04-02 14:29:00,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020894461] [2023-04-02 14:29:00,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:29:00,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 14:29:00,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:29:00,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 14:29:00,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=775, Unknown=8, NotChecked=0, Total=930 [2023-04-02 14:29:00,936 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 14:29:00,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:29:00,963 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2023-04-02 14:29:00,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 14:29:00,964 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 64 [2023-04-02 14:29:00,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:29:00,965 INFO L225 Difference]: With dead ends: 77 [2023-04-02 14:29:00,965 INFO L226 Difference]: Without dead ends: 57 [2023-04-02 14:29:00,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=147, Invalid=775, Unknown=8, NotChecked=0, Total=930 [2023-04-02 14:29:00,966 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:29:00,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:29:00,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-04-02 14:29:00,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-04-02 14:29:00,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 14:29:00,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2023-04-02 14:29:00,971 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 64 [2023-04-02 14:29:00,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:29:00,972 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2023-04-02 14:29:00,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 14:29:00,972 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2023-04-02 14:29:00,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-02 14:29:00,972 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:29:00,973 INFO L195 NwaCegarLoop]: trace histogram [30, 20, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:29:00,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 14:29:01,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:29:01,180 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:29:01,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:29:01,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1784959395, now seen corresponding path program 7 times [2023-04-02 14:29:01,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:29:01,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918122704] [2023-04-02 14:29:01,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:29:01,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:29:01,244 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:29:01,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1611782221] [2023-04-02 14:29:01,255 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:29:01,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:29:01,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:29:01,256 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:29:01,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 14:29:01,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:29:01,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 14:29:01,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:29:01,470 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 244 proven. 55 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2023-04-02 14:29:01,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:29:01,625 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2023-04-02 14:29:01,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:29:01,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918122704] [2023-04-02 14:29:01,625 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:29:01,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611782221] [2023-04-02 14:29:01,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611782221] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:29:01,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1126211164] [2023-04-02 14:29:01,627 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-04-02 14:29:01,627 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:29:01,627 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:29:01,627 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:29:01,627 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:29:01,637 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:29:03,718 INFO L197 IcfgInterpreter]: Interpreting procedure init_nondet with input of size 32 for LOIs [2023-04-02 14:29:03,743 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 19 for LOIs [2023-04-02 14:29:03,973 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:29:03,975 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:29:06,308 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4067#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 19 main_~i~2) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-02 14:29:06,309 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:29:06,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:29:06,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2023-04-02 14:29:06,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379157893] [2023-04-02 14:29:06,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:29:06,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-02 14:29:06,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:29:06,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-02 14:29:06,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=1320, Unknown=8, NotChecked=0, Total=1640 [2023-04-02 14:29:06,312 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 14:29:06,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:29:06,367 INFO L93 Difference]: Finished difference Result 93 states and 112 transitions. [2023-04-02 14:29:06,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-02 14:29:06,368 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 82 [2023-04-02 14:29:06,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:29:06,369 INFO L225 Difference]: With dead ends: 93 [2023-04-02 14:29:06,369 INFO L226 Difference]: Without dead ends: 67 [2023-04-02 14:29:06,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 204 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=312, Invalid=1320, Unknown=8, NotChecked=0, Total=1640 [2023-04-02 14:29:06,370 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:29:06,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:29:06,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-04-02 14:29:06,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2023-04-02 14:29:06,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 14:29:06,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2023-04-02 14:29:06,376 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 82 [2023-04-02 14:29:06,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:29:06,376 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2023-04-02 14:29:06,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 14:29:06,376 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2023-04-02 14:29:06,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-04-02 14:29:06,377 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:29:06,377 INFO L195 NwaCegarLoop]: trace histogram [60, 20, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:29:06,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 14:29:06,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 14:29:06,584 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:29:06,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:29:06,584 INFO L85 PathProgramCache]: Analyzing trace with hash -654507293, now seen corresponding path program 8 times [2023-04-02 14:29:06,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:29:06,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713892070] [2023-04-02 14:29:06,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:29:06,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:29:06,642 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:29:06,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957194478] [2023-04-02 14:29:06,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:29:06,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:29:06,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:29:06,644 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:29:06,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 14:29:06,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 14:29:06,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:29:06,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 14:29:06,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:29:06,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2179 backedges. 886 proven. 10 refuted. 0 times theorem prover too weak. 1283 trivial. 0 not checked. [2023-04-02 14:29:06,858 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:29:06,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2179 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2169 trivial. 0 not checked. [2023-04-02 14:29:06,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:29:06,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713892070] [2023-04-02 14:29:06,906 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:29:06,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957194478] [2023-04-02 14:29:06,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957194478] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:29:06,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [361803663] [2023-04-02 14:29:06,907 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-04-02 14:29:06,907 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:29:06,908 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:29:06,908 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:29:06,908 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:29:06,919 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:29:08,909 INFO L197 IcfgInterpreter]: Interpreting procedure init_nondet with input of size 32 for LOIs [2023-04-02 14:29:08,928 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 19 for LOIs [2023-04-02 14:29:09,145 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:29:09,147 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:29:11,414 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5060#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 19 main_~i~2) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-02 14:29:11,415 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:29:11,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:29:11,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-04-02 14:29:11,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729373498] [2023-04-02 14:29:11,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:29:11,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 14:29:11,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:29:11,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 14:29:11,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=775, Unknown=8, NotChecked=0, Total=930 [2023-04-02 14:29:11,416 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 14:29:11,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:29:11,444 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2023-04-02 14:29:11,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 14:29:11,445 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 112 [2023-04-02 14:29:11,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:29:11,445 INFO L225 Difference]: With dead ends: 101 [2023-04-02 14:29:11,446 INFO L226 Difference]: Without dead ends: 73 [2023-04-02 14:29:11,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=147, Invalid=775, Unknown=8, NotChecked=0, Total=930 [2023-04-02 14:29:11,447 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:29:11,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 96 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:29:11,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-04-02 14:29:11,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-04-02 14:29:11,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 14:29:11,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2023-04-02 14:29:11,453 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 112 [2023-04-02 14:29:11,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:29:11,453 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2023-04-02 14:29:11,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 14:29:11,453 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2023-04-02 14:29:11,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-04-02 14:29:11,454 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:29:11,454 INFO L195 NwaCegarLoop]: trace histogram [60, 20, 10, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:29:11,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-02 14:29:11,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-02 14:29:11,661 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:29:11,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:29:11,661 INFO L85 PathProgramCache]: Analyzing trace with hash -2074243613, now seen corresponding path program 9 times [2023-04-02 14:29:11,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:29:11,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573560214] [2023-04-02 14:29:11,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:29:11,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:29:11,697 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:29:11,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2026678885] [2023-04-02 14:29:11,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:29:11,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:29:11,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:29:11,699 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:29:11,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-02 14:29:11,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:29:11,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:29:11,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 14:29:11,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:29:11,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2224 backedges. 886 proven. 55 refuted. 0 times theorem prover too weak. 1283 trivial. 0 not checked. [2023-04-02 14:29:11,989 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:29:12,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2224 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2169 trivial. 0 not checked. [2023-04-02 14:29:12,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:29:12,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573560214] [2023-04-02 14:29:12,129 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:29:12,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026678885] [2023-04-02 14:29:12,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026678885] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:29:12,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1500825058] [2023-04-02 14:29:12,130 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-04-02 14:29:12,130 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:29:12,131 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:29:12,131 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:29:12,131 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:29:12,142 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:29:14,172 INFO L197 IcfgInterpreter]: Interpreting procedure init_nondet with input of size 32 for LOIs [2023-04-02 14:29:14,188 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 19 for LOIs [2023-04-02 14:29:14,442 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:29:14,444 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:29:16,705 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6128#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 19 main_~i~2) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-02 14:29:16,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:29:16,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:29:16,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2023-04-02 14:29:16,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597404720] [2023-04-02 14:29:16,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:29:16,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-02 14:29:16,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:29:16,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-02 14:29:16,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1261, Unknown=8, NotChecked=0, Total=1560 [2023-04-02 14:29:16,707 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 14:29:16,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:29:16,754 INFO L93 Difference]: Finished difference Result 110 states and 123 transitions. [2023-04-02 14:29:16,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-02 14:29:16,754 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 118 [2023-04-02 14:29:16,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:29:16,755 INFO L225 Difference]: With dead ends: 110 [2023-04-02 14:29:16,755 INFO L226 Difference]: Without dead ends: 82 [2023-04-02 14:29:16,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 312 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=291, Invalid=1261, Unknown=8, NotChecked=0, Total=1560 [2023-04-02 14:29:16,757 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:29:16,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 115 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:29:16,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-04-02 14:29:16,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2023-04-02 14:29:16,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 14:29:16,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2023-04-02 14:29:16,763 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 118 [2023-04-02 14:29:16,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:29:16,763 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2023-04-02 14:29:16,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 14:29:16,763 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2023-04-02 14:29:16,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-04-02 14:29:16,764 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:29:16,764 INFO L195 NwaCegarLoop]: trace histogram [60, 20, 19, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:29:16,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-02 14:29:16,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 14:29:16,972 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:29:16,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:29:16,973 INFO L85 PathProgramCache]: Analyzing trace with hash 659184811, now seen corresponding path program 10 times [2023-04-02 14:29:16,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:29:16,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972921697] [2023-04-02 14:29:16,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:29:16,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:29:17,009 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:29:17,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1810397201] [2023-04-02 14:29:17,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:29:17,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:29:17,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:29:17,011 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:29:17,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-02 14:29:20,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-02 14:29:20,928 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-02 14:29:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-02 14:29:33,647 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-04-02 14:29:33,648 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-02 14:29:33,648 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-02 14:29:33,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-02 14:29:33,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-02 14:29:33,868 INFO L445 BasicCegarLoop]: Path program histogram: [10, 1, 1, 1] [2023-04-02 14:29:33,870 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-02 14:29:33,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.04 02:29:33 BoogieIcfgContainer [2023-04-02 14:29:33,955 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-02 14:29:33,955 INFO L158 Benchmark]: Toolchain (without parser) took 64641.73ms. Allocated memory was 260.0MB in the beginning and 868.2MB in the end (delta: 608.2MB). Free memory was 216.0MB in the beginning and 732.0MB in the end (delta: -516.0MB). Peak memory consumption was 92.7MB. Max. memory is 8.0GB. [2023-04-02 14:29:33,955 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 187.7MB. Free memory is still 133.5MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 14:29:33,956 INFO L158 Benchmark]: CACSL2BoogieTranslator took 201.48ms. Allocated memory is still 260.0MB. Free memory was 216.0MB in the beginning and 205.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-02 14:29:33,956 INFO L158 Benchmark]: Boogie Preprocessor took 29.36ms. Allocated memory is still 260.0MB. Free memory was 205.5MB in the beginning and 204.0MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-04-02 14:29:33,956 INFO L158 Benchmark]: RCFGBuilder took 379.73ms. Allocated memory is still 260.0MB. Free memory was 204.0MB in the beginning and 186.6MB in the end (delta: 17.3MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2023-04-02 14:29:33,956 INFO L158 Benchmark]: TraceAbstraction took 64024.78ms. Allocated memory was 260.0MB in the beginning and 868.2MB in the end (delta: 608.2MB). Free memory was 186.1MB in the beginning and 732.0MB in the end (delta: -545.9MB). Peak memory consumption was 63.4MB. Max. memory is 8.0GB. [2023-04-02 14:29:33,957 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 187.7MB. Free memory is still 133.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 201.48ms. Allocated memory is still 260.0MB. Free memory was 216.0MB in the beginning and 205.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.36ms. Allocated memory is still 260.0MB. Free memory was 205.5MB in the beginning and 204.0MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 379.73ms. Allocated memory is still 260.0MB. Free memory was 204.0MB in the beginning and 186.6MB in the end (delta: 17.3MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * TraceAbstraction took 64024.78ms. Allocated memory was 260.0MB in the beginning and 868.2MB in the end (delta: 608.2MB). Free memory was 186.1MB in the beginning and 732.0MB in the end (delta: -545.9MB). Peak memory consumption was 63.4MB. Max. memory is 8.0GB. * 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: 61]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L42] int x[20]; VAL [x={3:0}] [L43] CALL init_nondet(x) VAL [x={3:0}] [L16] int i; [L17] i = 0 VAL [i=0, x={3:0}, x={3:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=1, x={3:0}, x={3:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=2, x={3:0}, x={3:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=3, x={3:0}, x={3:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=4, x={3:0}, x={3:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=5, x={3:0}, x={3:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=6, x={3:0}, x={3:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=7, x={3:0}, x={3:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=8, x={3:0}, x={3:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=9, x={3:0}, x={3:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=10, x={3:0}, x={3:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=11, x={3:0}, x={3:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=12, x={3:0}, x={3:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=13, x={3:0}, x={3:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=14, x={3:0}, x={3:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=15, x={3:0}, x={3:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=16, x={3:0}, x={3:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=17, x={3:0}, x={3:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=18, x={3:0}, x={3:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=19, x={3:0}, x={3:0}] [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=20, x={3:0}, x={3:0}] [L17] COND FALSE !(i < 20) [L43] RET init_nondet(x) VAL [x={3:0}] [L44] int temp; [L45] int ret; [L46] int ret2; [L47] int ret5; VAL [x={3:0}] [L49] CALL, EXPR rangesum(x) VAL [x={3:0}] [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 VAL [cnt=0, i=0, ret=0, x={3:0}, x={3:0}] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=1, ret=0, x={3:0}, x={3:0}, x[i]=113] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=2, ret=0, x={3:0}, x={3:0}, x[i]=113] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=3, ret=0, x={3:0}, x={3:0}, x[i]=113] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=4, ret=0, x={3:0}, x={3:0}, x[i]=113] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=5, ret=0, x={3:0}, x={3:0}, x[i]=113] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=6, ret=0, x={3:0}, x={3:0}, x[i]=113] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=7, ret=0, x={3:0}, x={3:0}, x[i]=113] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=8, ret=0, x={3:0}, x={3:0}, x[i]=113] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=9, ret=0, x={3:0}, x={3:0}, x[i]=113] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=10, ret=0, x={3:0}, x={3:0}, x[i]=113] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=11, ret=0, x={3:0}, x={3:0}, x[i]=113] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=1, i=12, ret=-51, x={3:0}, x={3:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=2, i=13, ret=-40, x={3:0}, x={3:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=3, i=14, ret=-32, x={3:0}, x={3:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=4, i=15, ret=-69, x={3:0}, x={3:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=5, i=16, ret=-107, x={3:0}, x={3:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=6, i=17, ret=-143, x={3:0}, x={3:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=7, i=18, ret=-180, x={3:0}, x={3:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=8, i=19, ret=-223, x={3:0}, x={3:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=9, i=20, ret=-36, x={3:0}, x={3:0}, x[i]=0] [L28] COND FALSE !(i < 20) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L49] RET, EXPR rangesum(x) VAL [rangesum(x)=-4, x={3:0}] [L49] ret = rangesum(x) [L51] EXPR x[0] [L51] temp=x[0] [L51] EXPR x[1] [L51] x[0] = x[1] [L51] x[1] = temp VAL [ret=-4, temp=-1, x={3:0}] [L52] CALL, EXPR rangesum(x) VAL [x={3:0}] [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 VAL [cnt=0, i=0, ret=0, x={3:0}, x={3:0}] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=1, ret=0, x={3:0}, x={3:0}, x[i]=197] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=2, ret=0, x={3:0}, x={3:0}, x[i]=197] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=3, ret=0, x={3:0}, x={3:0}, x[i]=197] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=4, ret=0, x={3:0}, x={3:0}, x[i]=197] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=5, ret=0, x={3:0}, x={3:0}, x[i]=197] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=6, ret=0, x={3:0}, x={3:0}, x[i]=197] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=7, ret=0, x={3:0}, x={3:0}, x[i]=197] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=8, ret=0, x={3:0}, x={3:0}, x[i]=197] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=9, ret=0, x={3:0}, x={3:0}, x[i]=197] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=10, ret=0, x={3:0}, x={3:0}, x[i]=197] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=11, ret=0, x={3:0}, x={3:0}, x[i]=197] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=1, i=12, ret=-51, x={3:0}, x={3:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=2, i=13, ret=-40, x={3:0}, x={3:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=3, i=14, ret=-32, x={3:0}, x={3:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=4, i=15, ret=-69, x={3:0}, x={3:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=5, i=16, ret=-107, x={3:0}, x={3:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=6, i=17, ret=-143, x={3:0}, x={3:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=7, i=18, ret=-180, x={3:0}, x={3:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=8, i=19, ret=-223, x={3:0}, x={3:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=9, i=20, ret=-36, x={3:0}, x={3:0}, x[i]=0] [L28] COND FALSE !(i < 20) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L52] RET, EXPR rangesum(x) VAL [rangesum(x)=-4, ret=-4, temp=-1, x={3:0}] [L52] ret2 = rangesum(x) [L53] EXPR x[0] [L53] temp=x[0] [L54] int i =0 ; VAL [i=0, ret2=-4, ret=-4, temp=-42, x={3:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=1, ret2=-4, ret=-4, temp=-42, x={3:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=2, ret2=-4, ret=-4, temp=-42, x={3:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=3, ret2=-4, ret=-4, temp=-42, x={3:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=4, ret2=-4, ret=-4, temp=-42, x={3:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=5, ret2=-4, ret=-4, temp=-42, x={3:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=6, ret2=-4, ret=-4, temp=-42, x={3:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=7, ret2=-4, ret=-4, temp=-42, x={3:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=8, ret2=-4, ret=-4, temp=-42, x={3:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=9, ret2=-4, ret=-4, temp=-42, x={3:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=10, ret2=-4, ret=-4, temp=-42, x={3:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=11, ret2=-4, ret=-4, temp=-42, x={3:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=12, ret2=-4, ret=-4, temp=-42, x={3:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=13, ret2=-4, ret=-4, temp=-42, x={3:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=14, ret2=-4, ret=-4, temp=-42, x={3:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=15, ret2=-4, ret=-4, temp=-42, x={3:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=16, ret2=-4, ret=-4, temp=-42, x={3:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=17, ret2=-4, ret=-4, temp=-42, x={3:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=18, ret2=-4, ret=-4, temp=-42, x={3:0}] [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=19, ret2=-4, ret=-4, temp=-42, x={3:0}] [L54] COND FALSE !(i<20 -1) [L57] x[20 -1] = temp VAL [i=19, ret2=-4, ret=-4, temp=-42, x={3:0}] [L58] CALL, EXPR rangesum(x) VAL [x={3:0}] [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 VAL [cnt=0, i=0, ret=0, x={3:0}, x={3:0}] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=1, ret=0, x={3:0}, x={3:0}, x[i]=323] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=2, ret=0, x={3:0}, x={3:0}, x[i]=323] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=3, ret=0, x={3:0}, x={3:0}, x[i]=323] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=4, ret=0, x={3:0}, x={3:0}, x[i]=323] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=5, ret=0, x={3:0}, x={3:0}, x[i]=323] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=6, ret=0, x={3:0}, x={3:0}, x[i]=323] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=7, ret=0, x={3:0}, x={3:0}, x[i]=323] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=8, ret=0, x={3:0}, x={3:0}, x[i]=323] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=9, ret=0, x={3:0}, x={3:0}, x[i]=323] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=10, ret=0, x={3:0}, x={3:0}, x[i]=323] [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ VAL [cnt=0, i=11, ret=0, x={3:0}, x={3:0}, x[i]=323] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=1, i=12, ret=11, x={3:0}, x={3:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=2, i=13, ret=19, x={3:0}, x={3:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=3, i=14, ret=-18, x={3:0}, x={3:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=4, i=15, ret=-56, x={3:0}, x={3:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=5, i=16, ret=-92, x={3:0}, x={3:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=6, i=17, ret=-129, x={3:0}, x={3:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=7, i=18, ret=-172, x={3:0}, x={3:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=8, i=19, ret=15, x={3:0}, x={3:0}, x[i]=0] [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ VAL [cnt=9, i=20, ret=-27, x={3:0}, x={3:0}, x[i]=0] [L28] COND FALSE !(i < 20) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L58] RET, EXPR rangesum(x) VAL [i=19, rangesum(x)=-3, ret2=-4, ret=-4, temp=-42, x={3:0}] [L58] ret5 = rangesum(x) [L60] COND TRUE ret != ret2 || ret !=ret5 VAL [i=19, ret2=-4, ret5=-3, ret=-4, temp=-42, x={3:0}] [L61] reach_error() VAL [i=19, ret2=-4, ret5=-3, ret=-4, temp=-42, x={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 63.9s, OverallIterations: 13, TraceHistogramMax: 60, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 797 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 554 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 364 IncrementalHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 243 mSDtfsCounter, 364 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1883 GetRequests, 1601 SyntacticMatches, 7 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2994 ImplicationChecksByTransitivity, 16.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=82occurred in iteration=12, InterpolantAutomatonStates: 128, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 4.6s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 940 NumberOfCodeBlocks, 834 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 1272 ConstructedInterpolants, 0 QuantifiedInterpolants, 1494 SizeOfPredicates, 0 NumberOfNonLiveVariables, 3355 ConjunctsInSsa, 69 ConjunctsInUnsatCore, 21 InterpolantComputations, 3 PerfectInterpolantSequences, 11657/12349 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-04-02 14:29:34,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...