/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 EqDomain -i ../sv-benchmarks/c/reducercommutativity/rangesum.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 08:49:01,624 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 08:49:01,626 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 08:49:01,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 08:49:01,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 08:49:01,666 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 08:49:01,669 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 08:49:01,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 08:49:01,672 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 08:49:01,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 08:49:01,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 08:49:01,680 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 08:49:01,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 08:49:01,682 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 08:49:01,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 08:49:01,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 08:49:01,683 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 08:49:01,684 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 08:49:01,685 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 08:49:01,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 08:49:01,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 08:49:01,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 08:49:01,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 08:49:01,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 08:49:01,697 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 08:49:01,700 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 08:49:01,700 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 08:49:01,701 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 08:49:01,702 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 08:49:01,702 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 08:49:01,702 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 08:49:01,703 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 08:49:01,703 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 08:49:01,703 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 08:49:01,704 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 08:49:01,705 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 08:49:01,708 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 [2023-04-01 08:49:01,732 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 08:49:01,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 08:49:01,733 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 08:49:01,733 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 08:49:01,734 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 08:49:01,734 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 08:49:01,734 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 08:49:01,734 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 08:49:01,734 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 08:49:01,734 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 08:49:01,735 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 08:49:01,735 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 08:49:01,735 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 08:49:01,735 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 08:49:01,735 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 08:49:01,735 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 08:49:01,736 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 08:49:01,736 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 08:49:01,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 08:49:01,736 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 08:49:01,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 08:49:01,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 08:49:01,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 08:49:01,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 08:49:01,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 08:49:01,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 08:49:01,737 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 08:49:01,738 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 08:49:01,738 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 08:49:01,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 08:49:01,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 08:49:01,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 08:49:01,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:49:01,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 08:49:01,739 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 08:49:01,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 08:49:01,739 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 08:49:01,739 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 08:49:01,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 08:49:01,739 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 08:49:01,739 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 08:49:01,739 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 08:49:01,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 08:49:01,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 08:49:01,986 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 08:49:01,987 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 08:49:01,988 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 08:49:01,989 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum.i [2023-04-01 08:49:03,178 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 08:49:03,381 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 08:49:03,381 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum.i [2023-04-01 08:49:03,387 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9a873ce0/180372a5769844d8aeebadf71e8f4955/FLAG1288864d1 [2023-04-01 08:49:03,405 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9a873ce0/180372a5769844d8aeebadf71e8f4955 [2023-04-01 08:49:03,407 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 08:49:03,409 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 08:49:03,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 08:49:03,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 08:49:03,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 08:49:03,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:49:03" (1/1) ... [2023-04-01 08:49:03,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72fbf777 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:49:03, skipping insertion in model container [2023-04-01 08:49:03,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:49:03" (1/1) ... [2023-04-01 08:49:03,422 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 08:49:03,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 08:49:03,567 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/rangesum.i[1544,1557] [2023-04-01 08:49:03,571 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:49:03,579 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 08:49:03,606 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/rangesum.i[1544,1557] [2023-04-01 08:49:03,607 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:49:03,619 INFO L208 MainTranslator]: Completed translation [2023-04-01 08:49:03,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:49:03 WrapperNode [2023-04-01 08:49:03,620 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 08:49:03,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 08:49:03,621 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 08:49:03,621 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 08:49:03,630 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:49:03" (1/1) ... [2023-04-01 08:49:03,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:49:03" (1/1) ... [2023-04-01 08:49:03,641 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:49:03" (1/1) ... [2023-04-01 08:49:03,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:49:03" (1/1) ... [2023-04-01 08:49:03,650 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:49:03" (1/1) ... [2023-04-01 08:49:03,654 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:49:03" (1/1) ... [2023-04-01 08:49:03,655 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:49:03" (1/1) ... [2023-04-01 08:49:03,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:49:03" (1/1) ... [2023-04-01 08:49:03,658 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 08:49:03,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 08:49:03,659 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 08:49:03,659 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 08:49:03,660 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:49:03" (1/1) ... [2023-04-01 08:49:03,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:49:03,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:49:03,690 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) [2023-04-01 08:49:03,692 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 [2023-04-01 08:49:03,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 08:49:03,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 08:49:03,726 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 08:49:03,731 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2023-04-01 08:49:03,731 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2023-04-01 08:49:03,731 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 08:49:03,731 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 08:49:03,731 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 08:49:03,731 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 08:49:03,732 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 08:49:03,732 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 08:49:03,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 08:49:03,732 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 08:49:03,732 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2023-04-01 08:49:03,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 08:49:03,732 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2023-04-01 08:49:03,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 08:49:03,733 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 08:49:03,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 08:49:03,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 08:49:03,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 08:49:03,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 08:49:03,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 08:49:03,801 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 08:49:03,803 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 08:49:03,990 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 08:49:04,137 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 08:49:04,138 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 08:49:04,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:49:04 BoogieIcfgContainer [2023-04-01 08:49:04,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 08:49:04,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 08:49:04,142 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 08:49:04,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 08:49:04,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:49:03" (1/3) ... [2023-04-01 08:49:04,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a125cb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:49:04, skipping insertion in model container [2023-04-01 08:49:04,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:49:03" (2/3) ... [2023-04-01 08:49:04,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a125cb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:49:04, skipping insertion in model container [2023-04-01 08:49:04,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:49:04" (3/3) ... [2023-04-01 08:49:04,148 INFO L112 eAbstractionObserver]: Analyzing ICFG rangesum.i [2023-04-01 08:49:04,166 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 08:49:04,166 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 08:49:04,214 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 08:49:04,219 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;@45cd755a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 08:49:04,220 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 08:49:04,223 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 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) [2023-04-01 08:49:04,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 08:49:04,228 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:49:04,229 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] [2023-04-01 08:49:04,229 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:49:04,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:49:04,233 INFO L85 PathProgramCache]: Analyzing trace with hash -320671087, now seen corresponding path program 1 times [2023-04-01 08:49:04,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:49:04,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203729319] [2023-04-01 08:49:04,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:04,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:49:04,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:49:04,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:49:04,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203729319] [2023-04-01 08:49:04,409 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-01 08:49:04,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900867941] [2023-04-01 08:49:04,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:04,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:49:04,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:49:04,421 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) [2023-04-01 08:49:04,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 08:49:04,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:49:04,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 08:49:04,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:49:04,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 08:49:04,688 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 08:49:04,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900867941] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:49:04,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 08:49:04,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 08:49:04,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085217139] [2023-04-01 08:49:04,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:49:04,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 08:49:04,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:49:04,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 08:49:04,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 08:49:04,740 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 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 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 08:49:04,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:49:04,845 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2023-04-01 08:49:04,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 08:49:04,848 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 29 [2023-04-01 08:49:04,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:49:04,854 INFO L225 Difference]: With dead ends: 54 [2023-04-01 08:49:04,855 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 08:49:04,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 08:49:04,862 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 26 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:49:04,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 48 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:49:04,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 08:49:04,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-04-01 08:49:04,900 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) [2023-04-01 08:49:04,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-04-01 08:49:04,903 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2023-04-01 08:49:04,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:49:04,904 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-04-01 08:49:04,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 08:49:04,904 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-04-01 08:49:04,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 08:49:04,906 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:49:04,906 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, 1] [2023-04-01 08:49:04,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 08:49:05,113 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 [2023-04-01 08:49:05,114 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:49:05,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:49:05,115 INFO L85 PathProgramCache]: Analyzing trace with hash 2030063906, now seen corresponding path program 1 times [2023-04-01 08:49:05,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:49:05,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108205810] [2023-04-01 08:49:05,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:05,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:49:05,147 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:49:05,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [703908545] [2023-04-01 08:49:05,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:05,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:49:05,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:49:05,153 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) [2023-04-01 08:49:05,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 08:49:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:49:05,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 08:49:05,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:49:05,305 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 08:49:05,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:49:05,436 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 08:49:05,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:49:05,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108205810] [2023-04-01 08:49:05,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 08:49:05,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703908545] [2023-04-01 08:49:05,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703908545] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:49:05,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [815563812] [2023-04-01 08:49:05,477 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 08:49:05,477 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:49:05,481 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:49:05,485 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:49:05,486 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:49:05,618 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 08:49:06,489 INFO L197 IcfgInterpreter]: Interpreting procedure init_nondet with input of size 63 for LOIs [2023-04-01 08:49:06,558 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 27 for LOIs [2023-04-01 08:49:06,578 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:49:06,583 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:49:08,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [815563812] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:49:08,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 08:49:08,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [5, 6] total 28 [2023-04-01 08:49:08,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043098504] [2023-04-01 08:49:08,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:49:08,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-01 08:49:08,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:49:08,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-01 08:49:08,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=665, Unknown=3, NotChecked=0, Total=756 [2023-04-01 08:49:08,157 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 22 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 13 states have internal predecessors, (15), 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) [2023-04-01 08:49:09,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:49:09,560 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2023-04-01 08:49:09,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 08:49:09,561 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 13 states have internal predecessors, (15), 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) Word has length 30 [2023-04-01 08:49:09,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:49:09,563 INFO L225 Difference]: With dead ends: 41 [2023-04-01 08:49:09,564 INFO L226 Difference]: Without dead ends: 37 [2023-04-01 08:49:09,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=191, Invalid=1612, Unknown=3, NotChecked=0, Total=1806 [2023-04-01 08:49:09,567 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 08:49:09,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 68 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 08:49:09,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-01 08:49:09,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2023-04-01 08:49:09,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2023-04-01 08:49:09,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2023-04-01 08:49:09,586 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 30 [2023-04-01 08:49:09,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:49:09,587 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2023-04-01 08:49:09,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 13 states have internal predecessors, (15), 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) [2023-04-01 08:49:09,587 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2023-04-01 08:49:09,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 08:49:09,590 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:49:09,590 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, 1, 1] [2023-04-01 08:49:09,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 08:49:09,801 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 [2023-04-01 08:49:09,801 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:49:09,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:49:09,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1737166559, now seen corresponding path program 1 times [2023-04-01 08:49:09,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:49:09,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566482815] [2023-04-01 08:49:09,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:09,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:49:09,826 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:49:09,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1224910869] [2023-04-01 08:49:09,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:09,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:49:09,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:49:09,829 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) [2023-04-01 08:49:09,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 08:49:09,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:49:09,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 08:49:09,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:49:09,926 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 08:49:09,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:49:09,992 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 08:49:09,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:49:09,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566482815] [2023-04-01 08:49:09,992 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 08:49:09,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224910869] [2023-04-01 08:49:09,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224910869] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:49:09,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [711782302] [2023-04-01 08:49:09,995 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 08:49:09,995 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:49:09,995 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:49:09,996 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:49:09,996 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:49:10,041 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 08:49:13,813 INFO L197 IcfgInterpreter]: Interpreting procedure init_nondet with input of size 63 for LOIs [2023-04-01 08:49:13,858 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 25 for LOIs [2023-04-01 08:49:14,178 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:49:14,181 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:49:16,437 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '768#(and (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (not (= ~N~0 1)) (not (= |main_~#x~0.base| 0)) (= (select |old(#length)| 2) 11) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |main_~#x~0.offset| 0) (= |old(~N~0)| 0) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 1) 1) 0) (= main_~i~2 0) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0))' at error location [2023-04-01 08:49:16,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:49:16,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 08:49:16,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2023-04-01 08:49:16,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970720140] [2023-04-01 08:49:16,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 08:49:16,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 08:49:16,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:49:16,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 08:49:16,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2023-04-01 08:49:16,439 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2023-04-01 08:49:16,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:49:16,502 INFO L93 Difference]: Finished difference Result 55 states and 77 transitions. [2023-04-01 08:49:16,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 08:49:16,503 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 31 [2023-04-01 08:49:16,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:49:16,504 INFO L225 Difference]: With dead ends: 55 [2023-04-01 08:49:16,504 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 08:49:16,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2023-04-01 08:49:16,506 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:49:16,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 55 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:49:16,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 08:49:16,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-04-01 08:49:16,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2023-04-01 08:49:16,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2023-04-01 08:49:16,518 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 31 [2023-04-01 08:49:16,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:49:16,518 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2023-04-01 08:49:16,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2023-04-01 08:49:16,519 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2023-04-01 08:49:16,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 08:49:16,519 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:49:16,520 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:49:16,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 08:49:16,725 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 [2023-04-01 08:49:16,725 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:49:16,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:49:16,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1640697136, now seen corresponding path program 2 times [2023-04-01 08:49:16,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:49:16,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841327166] [2023-04-01 08:49:16,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:16,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:49:16,747 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:49:16,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264373315] [2023-04-01 08:49:16,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:49:16,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:49:16,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:49:16,756 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) [2023-04-01 08:49:16,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 08:49:16,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-04-01 08:49:16,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:49:16,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 08:49:16,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:49:16,861 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 08:49:16,861 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 08:49:16,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:49:16,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841327166] [2023-04-01 08:49:16,862 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 08:49:16,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264373315] [2023-04-01 08:49:16,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264373315] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:49:16,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 08:49:16,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 08:49:16,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205986592] [2023-04-01 08:49:16,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:49:16,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 08:49:16,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:49:16,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 08:49:16,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 08:49:16,865 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 08:49:16,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:49:16,904 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2023-04-01 08:49:16,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 08:49:16,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2023-04-01 08:49:16,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:49:16,905 INFO L225 Difference]: With dead ends: 44 [2023-04-01 08:49:16,905 INFO L226 Difference]: Without dead ends: 27 [2023-04-01 08:49:16,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 08:49:16,906 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:49:16,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 34 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:49:16,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-01 08:49:16,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-04-01 08:49:16,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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) [2023-04-01 08:49:16,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-04-01 08:49:16,915 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2023-04-01 08:49:16,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:49:16,916 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-04-01 08:49:16,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 08:49:16,916 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-04-01 08:49:16,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 08:49:16,918 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:49:16,918 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:49:16,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 08:49:17,121 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 [2023-04-01 08:49:17,121 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:49:17,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:49:17,121 INFO L85 PathProgramCache]: Analyzing trace with hash -198724038, now seen corresponding path program 3 times [2023-04-01 08:49:17,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:49:17,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273288897] [2023-04-01 08:49:17,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:17,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:49:17,149 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:49:17,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [302789160] [2023-04-01 08:49:17,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:49:17,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:49:17,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:49:17,151 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) [2023-04-01 08:49:17,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 08:49:17,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:49:17,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:49:17,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 08:49:17,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:49:17,262 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 08:49:17,262 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 08:49:17,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:49:17,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273288897] [2023-04-01 08:49:17,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 08:49:17,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302789160] [2023-04-01 08:49:17,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302789160] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:49:17,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 08:49:17,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 08:49:17,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301781604] [2023-04-01 08:49:17,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:49:17,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 08:49:17,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:49:17,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 08:49:17,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 08:49:17,264 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 08:49:17,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:49:17,301 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2023-04-01 08:49:17,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 08:49:17,302 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 34 [2023-04-01 08:49:17,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:49:17,302 INFO L225 Difference]: With dead ends: 37 [2023-04-01 08:49:17,302 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 08:49:17,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 08:49:17,303 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:49:17,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 34 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:49:17,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 08:49:17,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-01 08:49:17,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 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) [2023-04-01 08:49:17,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-04-01 08:49:17,311 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2023-04-01 08:49:17,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:49:17,311 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-04-01 08:49:17,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 08:49:17,312 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-04-01 08:49:17,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 08:49:17,312 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:49:17,312 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:49:17,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 08:49:17,517 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 [2023-04-01 08:49:17,517 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:49:17,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:49:17,517 INFO L85 PathProgramCache]: Analyzing trace with hash 615687697, now seen corresponding path program 1 times [2023-04-01 08:49:17,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:49:17,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23863933] [2023-04-01 08:49:17,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:17,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:49:17,534 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:49:17,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [30900712] [2023-04-01 08:49:17,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:17,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:49:17,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:49:17,541 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) [2023-04-01 08:49:17,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 08:49:17,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:49:17,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 08:49:17,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:49:17,652 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 08:49:17,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:49:17,720 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 08:49:17,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:49:17,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23863933] [2023-04-01 08:49:17,720 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 08:49:17,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30900712] [2023-04-01 08:49:17,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30900712] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:49:17,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [187544237] [2023-04-01 08:49:17,723 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 08:49:17,723 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:49:17,723 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:49:17,723 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:49:17,723 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:49:17,752 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 08:49:20,216 INFO L197 IcfgInterpreter]: Interpreting procedure init_nondet with input of size 63 for LOIs [2023-04-01 08:49:20,265 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 25 for LOIs [2023-04-01 08:49:20,496 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:49:20,499 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:49:24,306 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1551#(and (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (not (= ~N~0 1)) (not (= |main_~#x~0.base| 0)) (= (select |old(#length)| 2) 11) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |main_~#x~0.offset| 0) (= |old(~N~0)| 0) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0))' at error location [2023-04-01 08:49:24,307 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:49:24,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 08:49:24,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2023-04-01 08:49:24,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287086222] [2023-04-01 08:49:24,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 08:49:24,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 08:49:24,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:49:24,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 08:49:24,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2023-04-01 08:49:24,309 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-04-01 08:49:24,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:49:24,360 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2023-04-01 08:49:24,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 08:49:24,360 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 35 [2023-04-01 08:49:24,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:49:24,361 INFO L225 Difference]: With dead ends: 43 [2023-04-01 08:49:24,361 INFO L226 Difference]: Without dead ends: 29 [2023-04-01 08:49:24,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2023-04-01 08:49:24,367 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:49:24,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 31 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:49:24,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-01 08:49:24,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-04-01 08:49:24,381 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) [2023-04-01 08:49:24,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-04-01 08:49:24,382 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 35 [2023-04-01 08:49:24,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:49:24,382 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-04-01 08:49:24,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-04-01 08:49:24,384 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-04-01 08:49:24,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 08:49:24,386 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:49:24,386 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:49:24,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 08:49:24,589 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 [2023-04-01 08:49:24,589 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:49:24,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:49:24,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1021011018, now seen corresponding path program 2 times [2023-04-01 08:49:24,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:49:24,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527166591] [2023-04-01 08:49:24,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:49:24,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:49:24,606 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:49:24,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541788255] [2023-04-01 08:49:24,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:49:24,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:49:24,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:49:24,608 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) [2023-04-01 08:49:24,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 08:49:24,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-01 08:49:24,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:49:24,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 42 conjunts are in the unsatisfiable core [2023-04-01 08:49:24,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:49:25,114 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 20 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 08:49:25,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:49:27,205 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:49:27,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 87 [2023-04-01 08:49:36,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 93