/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/array-lopstr16/single_elem_safe.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:03:02,989 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:03:02,991 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:03:03,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:03:03,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:03:03,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:03:03,011 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:03:03,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:03:03,012 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:03:03,013 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:03:03,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:03:03,014 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:03:03,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:03:03,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:03:03,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:03:03,016 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:03:03,017 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:03:03,017 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:03:03,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:03:03,019 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:03:03,020 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:03:03,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:03:03,021 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:03:03,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:03:03,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:03:03,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:03:03,024 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:03:03,025 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:03:03,025 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:03:03,025 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:03:03,026 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:03:03,026 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:03:03,026 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:03:03,027 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:03:03,027 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:03:03,027 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:03:03,028 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:03:03,028 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:03:03,028 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:03:03,029 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:03:03,029 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:03:03,035 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 09:03:03,049 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:03:03,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:03:03,050 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:03:03,050 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:03:03,050 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:03:03,050 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:03:03,050 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:03:03,051 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:03:03,051 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:03:03,051 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:03:03,051 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:03:03,051 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:03:03,051 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:03:03,051 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:03:03,051 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:03:03,052 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:03:03,052 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:03:03,052 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:03:03,052 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:03:03,052 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:03:03,053 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:03:03,053 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:03:03,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:03:03,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:03:03,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:03:03,053 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:03:03,053 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:03:03,053 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:03:03,053 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:03:03,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:03:03,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:03:03,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:03:03,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:03:03,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:03:03,054 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:03:03,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:03:03,054 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:03:03,055 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:03:03,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:03:03,055 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:03:03,055 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:03:03,055 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:03:03,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:03:03,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:03:03,232 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:03:03,234 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:03:03,234 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:03:03,235 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-lopstr16/single_elem_safe.i [2023-04-01 09:03:04,176 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:03:04,416 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:03:04,416 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/single_elem_safe.i [2023-04-01 09:03:04,424 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06b70b880/2c6e40de038d4a14b6d0405e7531fd83/FLAGf6e76a9da [2023-04-01 09:03:04,440 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06b70b880/2c6e40de038d4a14b6d0405e7531fd83 [2023-04-01 09:03:04,442 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:03:04,443 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:03:04,453 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:03:04,453 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:03:04,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:03:04,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:03:04" (1/1) ... [2023-04-01 09:03:04,459 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@394abceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:04, skipping insertion in model container [2023-04-01 09:03:04,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:03:04" (1/1) ... [2023-04-01 09:03:04,464 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:03:04,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:03:04,583 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/array-lopstr16/single_elem_safe.i[809,822] [2023-04-01 09:03:04,623 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:03:04,630 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:03:04,646 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/array-lopstr16/single_elem_safe.i[809,822] [2023-04-01 09:03:04,660 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:03:04,682 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:03:04,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:04 WrapperNode [2023-04-01 09:03:04,683 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:03:04,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:03:04,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:03:04,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:03:04,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:04" (1/1) ... [2023-04-01 09:03:04,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:04" (1/1) ... [2023-04-01 09:03:04,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:04" (1/1) ... [2023-04-01 09:03:04,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:04" (1/1) ... [2023-04-01 09:03:04,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:04" (1/1) ... [2023-04-01 09:03:04,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:04" (1/1) ... [2023-04-01 09:03:04,725 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:04" (1/1) ... [2023-04-01 09:03:04,726 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:04" (1/1) ... [2023-04-01 09:03:04,728 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:03:04,729 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:03:04,729 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:03:04,729 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:03:04,729 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:04" (1/1) ... [2023-04-01 09:03:04,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:03:04,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:03:04,750 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 09:03:04,751 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 09:03:04,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:03:04,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:03:04,782 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:03:04,783 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 09:03:04,783 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:03:04,784 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:03:04,784 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:03:04,786 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 09:03:04,786 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 09:03:04,786 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:03:04,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:03:04,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 09:03:04,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:03:04,787 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 09:03:04,787 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:03:04,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 09:03:04,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:03:04,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:03:04,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 09:03:04,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 09:03:04,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:03:04,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:03:04,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:03:04,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:03:04,852 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:03:04,853 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:03:05,037 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:03:05,141 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:03:05,142 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 09:03:05,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:03:05 BoogieIcfgContainer [2023-04-01 09:03:05,143 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:03:05,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:03:05,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:03:05,147 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:03:05,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:03:04" (1/3) ... [2023-04-01 09:03:05,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c8cbbe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:03:05, skipping insertion in model container [2023-04-01 09:03:05,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:04" (2/3) ... [2023-04-01 09:03:05,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c8cbbe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:03:05, skipping insertion in model container [2023-04-01 09:03:05,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:03:05" (3/3) ... [2023-04-01 09:03:05,149 INFO L112 eAbstractionObserver]: Analyzing ICFG single_elem_safe.i [2023-04-01 09:03:05,164 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:03:05,165 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:03:05,203 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:03:05,207 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;@7e43a18e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:03:05,207 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:03:05,210 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:03:05,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 09:03:05,215 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:03:05,215 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:03:05,216 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:03:05,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:03:05,219 INFO L85 PathProgramCache]: Analyzing trace with hash -2090491817, now seen corresponding path program 1 times [2023-04-01 09:03:05,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:03:05,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443883575] [2023-04-01 09:03:05,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:03:05,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:03:05,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:03:05,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:03:05,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:03:05,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443883575] [2023-04-01 09:03:05,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443883575] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:03:05,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:03:05,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:03:05,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224831269] [2023-04-01 09:03:05,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:03:05,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:03:05,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:03:05,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:03:05,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:03:05,402 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:03:05,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:03:05,487 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2023-04-01 09:03:05,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:03:05,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-01 09:03:05,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:03:05,493 INFO L225 Difference]: With dead ends: 40 [2023-04-01 09:03:05,493 INFO L226 Difference]: Without dead ends: 23 [2023-04-01 09:03:05,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:03:05,497 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:03:05,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 31 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:03:05,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-01 09:03:05,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2023-04-01 09:03:05,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:03:05,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-04-01 09:03:05,529 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2023-04-01 09:03:05,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:03:05,530 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-04-01 09:03:05,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:03:05,530 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-04-01 09:03:05,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 09:03:05,530 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:03:05,531 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:03:05,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:03:05,531 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:03:05,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:03:05,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1026462345, now seen corresponding path program 1 times [2023-04-01 09:03:05,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:03:05,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291979650] [2023-04-01 09:03:05,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:03:05,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:03:05,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:03:05,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:03:05,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:03:05,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291979650] [2023-04-01 09:03:05,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291979650] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:03:05,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674476815] [2023-04-01 09:03:05,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:03:05,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:03:05,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:03:05,753 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 09:03:05,772 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 09:03:05,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:03:05,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 09:03:05,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:03:05,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:03:05,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:03:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:03:05,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674476815] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:03:05,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1751007138] [2023-04-01 09:03:05,918 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 09:03:05,918 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:03:05,920 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:03:05,923 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:03:05,924 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:03:06,043 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 59 for LOIs [2023-04-01 09:03:06,825 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 118 for LOIs [2023-04-01 09:03:06,884 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 19 for LOIs [2023-04-01 09:03:06,893 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:03:07,848 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '189#(and (exists ((|v_old(#length)_BEFORE_CALL_1| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_1| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_1| (Array Int Int))) (and (= (select |v_old(#valid)_BEFORE_CALL_1| 3) 1) (not (= |v_old(#valid)_BEFORE_CALL_1| |v_old(#length)_BEFORE_CALL_1|)) (= 4000000 (select |v_old(#length)_BEFORE_CALL_1| 3)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_1| 1) |v_old(#valid)_BEFORE_CALL_1|)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_1| 1) 0)) (= (select |v_old(#valid)_BEFORE_CALL_1| 1) 1) (= 2 (select |v_old(#length)_BEFORE_CALL_1| 1)) (= (select |v_old(#valid)_BEFORE_CALL_1| 2) 1) (not (= (select |v_old(#memory_int)_BEFORE_CALL_1| 1) |v_old(#length)_BEFORE_CALL_1|)) (= (select |v_old(#valid)_BEFORE_CALL_1| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_1| 1) 1) 0) (= 19 (select |v_old(#length)_BEFORE_CALL_1| 2)))) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| 3) 0)) (select (select |#memory_$Pointer$.offset| 3) 0)) 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= 3 |~#a~0.base|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| 3) 0)) (select (select |#memory_$Pointer$.offset| 3) 0)) 0) (= (select (select |#memory_int| (select (select |#memory_$Pointer$.base| 3) 0)) (+ (select (select |#memory_$Pointer$.offset| 3) 0) 4)) 0) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (exists ((|v_#memory_$Pointer$.offset_69| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_69| 3 (store (select |v_#memory_$Pointer$.offset_69| 3) 12 0)))) (exists ((|v_#valid_44| (Array Int Int)) (|v_#length_44| (Array Int Int)) (|v_main_#t~malloc6.base_5| Int) (|v_#memory_$Pointer$.base_69| (Array Int (Array Int Int)))) (and (not (= 0 |v_main_#t~malloc6.base_5|)) (= (store |v_#length_44| |v_main_#t~malloc6.base_5| 8) |#length|) (< |v_main_#t~malloc6.base_5| |#StackHeapBarrier|) (= (store |v_#memory_$Pointer$.base_69| 3 (store (select |v_#memory_$Pointer$.base_69| 3) 12 |v_main_#t~malloc6.base_5|)) |#memory_$Pointer$.base|) (= (store |v_#valid_44| |v_main_#t~malloc6.base_5| 1) |#valid|) (= (select |v_#valid_44| |v_main_#t~malloc6.base_5|) 0))) (or (not (= (select (select |#memory_$Pointer$.base| 3) 0) 0)) (not (= (select (select |#memory_$Pointer$.offset| 3) 0) 0))) (= |#NULL.base| 0))' at error location [2023-04-01 09:03:07,848 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:03:07,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 09:03:07,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 09:03:07,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662812700] [2023-04-01 09:03:07,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 09:03:07,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 09:03:07,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:03:07,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 09:03:07,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-04-01 09:03:07,851 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:03:07,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:03:07,925 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2023-04-01 09:03:07,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 09:03:07,925 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-04-01 09:03:07,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:03:07,926 INFO L225 Difference]: With dead ends: 48 [2023-04-01 09:03:07,926 INFO L226 Difference]: Without dead ends: 37 [2023-04-01 09:03:07,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-04-01 09:03:07,927 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:03:07,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 44 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:03:07,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-01 09:03:07,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 21. [2023-04-01 09:03:07,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:03:07,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-04-01 09:03:07,931 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2023-04-01 09:03:07,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:03:07,931 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-04-01 09:03:07,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:03:07,931 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-04-01 09:03:07,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 09:03:07,932 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:03:07,932 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:03:07,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 09:03:08,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:03:08,140 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:03:08,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:03:08,141 INFO L85 PathProgramCache]: Analyzing trace with hash 657038551, now seen corresponding path program 2 times [2023-04-01 09:03:08,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:03:08,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423475141] [2023-04-01 09:03:08,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:03:08,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:03:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:03:08,433 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:03:08,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:03:08,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423475141] [2023-04-01 09:03:08,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423475141] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:03:08,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241283134] [2023-04-01 09:03:08,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:03:08,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:03:08,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:03:08,435 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 09:03:08,438 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 09:03:08,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 09:03:08,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:03:08,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 09:03:08,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:03:08,820 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:03:08,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:03:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:03:08,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241283134] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:03:08,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [374436369] [2023-04-01 09:03:08,877 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 09:03:08,877 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:03:08,877 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:03:08,877 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:03:08,878 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:03:08,956 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 59 for LOIs [2023-04-01 09:03:09,394 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 118 for LOIs [2023-04-01 09:03:09,426 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 19 for LOIs [2023-04-01 09:03:09,432 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:03:10,339 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '409#(and (exists ((|v_old(#valid)_BEFORE_CALL_2| (Array Int Int)) (|v_old(#length)_BEFORE_CALL_2| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_2| (Array Int (Array Int Int)))) (and (= 2 (select |v_old(#length)_BEFORE_CALL_2| 1)) (= (select |v_old(#length)_BEFORE_CALL_2| 3) 4000000) (= (select (select |v_old(#memory_int)_BEFORE_CALL_2| 1) 1) 0) (= 19 (select |v_old(#length)_BEFORE_CALL_2| 2)) (= (select |v_old(#valid)_BEFORE_CALL_2| 0) 0) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_2| 1) 0)) (not (= |v_old(#length)_BEFORE_CALL_2| (select |v_old(#memory_int)_BEFORE_CALL_2| 1))) (not (= |v_old(#valid)_BEFORE_CALL_2| (select |v_old(#memory_int)_BEFORE_CALL_2| 1))) (not (= |v_old(#valid)_BEFORE_CALL_2| |v_old(#length)_BEFORE_CALL_2|)) (= (select |v_old(#valid)_BEFORE_CALL_2| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_2| 3) 1) (= (select |v_old(#valid)_BEFORE_CALL_2| 1) 1))) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| 3) 0)) (select (select |#memory_$Pointer$.offset| 3) 0)) 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= 3 |~#a~0.base|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| 3) 0)) (select (select |#memory_$Pointer$.offset| 3) 0)) 0) (= (select (select |#memory_int| (select (select |#memory_$Pointer$.base| 3) 0)) (+ (select (select |#memory_$Pointer$.offset| 3) 0) 4)) 0) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (exists ((|v_#memory_$Pointer$.offset_100| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_100| 3 (store (select |v_#memory_$Pointer$.offset_100| 3) 12 0)))) (exists ((|v_#valid_62| (Array Int Int)) (|v_main_#t~malloc6.base_5| Int) (|v_#memory_$Pointer$.base_100| (Array Int (Array Int Int))) (|v_#length_62| (Array Int Int))) (and (not (= 0 |v_main_#t~malloc6.base_5|)) (= |#length| (store |v_#length_62| |v_main_#t~malloc6.base_5| 8)) (< |v_main_#t~malloc6.base_5| |#StackHeapBarrier|) (= (store |v_#valid_62| |v_main_#t~malloc6.base_5| 1) |#valid|) (= (select |v_#valid_62| |v_main_#t~malloc6.base_5|) 0) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_100| 3 (store (select |v_#memory_$Pointer$.base_100| 3) 12 |v_main_#t~malloc6.base_5|))))) (or (not (= (select (select |#memory_$Pointer$.base| 3) 0) 0)) (not (= (select (select |#memory_$Pointer$.offset| 3) 0) 0))) (= |#NULL.base| 0))' at error location [2023-04-01 09:03:10,339 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:03:10,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 09:03:10,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-01 09:03:10,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427478288] [2023-04-01 09:03:10,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 09:03:10,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 09:03:10,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:03:10,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 09:03:10,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2023-04-01 09:03:10,341 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:03:10,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:03:10,503 INFO L93 Difference]: Finished difference Result 84 states and 111 transitions. [2023-04-01 09:03:10,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 09:03:10,504 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-04-01 09:03:10,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:03:10,505 INFO L225 Difference]: With dead ends: 84 [2023-04-01 09:03:10,505 INFO L226 Difference]: Without dead ends: 73 [2023-04-01 09:03:10,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2023-04-01 09:03:10,506 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 88 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:03:10,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 70 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:03:10,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-04-01 09:03:10,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 27. [2023-04-01 09:03:10,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:03:10,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-04-01 09:03:10,511 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 16 [2023-04-01 09:03:10,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:03:10,511 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-04-01 09:03:10,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:03:10,511 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-04-01 09:03:10,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 09:03:10,512 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:03:10,512 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:03:10,519 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 09:03:10,719 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,SelfDestructingSolverStorable2 [2023-04-01 09:03:10,720 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:03:10,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:03:10,720 INFO L85 PathProgramCache]: Analyzing trace with hash 439312279, now seen corresponding path program 3 times [2023-04-01 09:03:10,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:03:10,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510261273] [2023-04-01 09:03:10,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:03:10,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:03:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:03:11,054 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:03:11,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:03:11,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510261273] [2023-04-01 09:03:11,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510261273] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:03:11,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274953034] [2023-04-01 09:03:11,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 09:03:11,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:03:11,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:03:11,072 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 09:03:11,073 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 09:03:11,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 09:03:11,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:03:11,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 09:03:11,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:03:11,262 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:03:11,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:03:11,442 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:03:11,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274953034] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:03:11,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [651645207] [2023-04-01 09:03:11,444 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 09:03:11,444 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:03:11,444 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:03:11,444 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:03:11,444 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:03:11,482 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 59 for LOIs [2023-04-01 09:03:11,849 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 118 for LOIs [2023-04-01 09:03:11,875 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 19 for LOIs [2023-04-01 09:03:11,880 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:03:12,801 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '743#(and (exists ((|v_#memory_$Pointer$.offset_161| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_161| 3 (store (select |v_#memory_$Pointer$.offset_161| 3) 12 0)))) (exists ((|v_#memory_$Pointer$.base_161| (Array Int (Array Int Int))) (|v_#valid_98| (Array Int Int)) (|v_#length_98| (Array Int Int)) (|v_main_#t~malloc6.base_5| Int)) (and (= (store |v_#valid_98| |v_main_#t~malloc6.base_5| 1) |#valid|) (not (= 0 |v_main_#t~malloc6.base_5|)) (< |v_main_#t~malloc6.base_5| |#StackHeapBarrier|) (= (select |v_#valid_98| |v_main_#t~malloc6.base_5|) 0) (= |#length| (store |v_#length_98| |v_main_#t~malloc6.base_5| 8)) (= (store |v_#memory_$Pointer$.base_161| 3 (store (select |v_#memory_$Pointer$.base_161| 3) 12 |v_main_#t~malloc6.base_5|)) |#memory_$Pointer$.base|))) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| 3) 0)) (select (select |#memory_$Pointer$.offset| 3) 0)) 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= 3 |~#a~0.base|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| 3) 0)) (select (select |#memory_$Pointer$.offset| 3) 0)) 0) (= (select (select |#memory_int| (select (select |#memory_$Pointer$.base| 3) 0)) (+ (select (select |#memory_$Pointer$.offset| 3) 0) 4)) 0) (exists ((|v_old(#length)_BEFORE_CALL_3| (Array Int Int)) (|v_old(#valid)_BEFORE_CALL_3| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_3| (Array Int (Array Int Int)))) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 1) 0) 48) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_3| 0) 0) (not (= |v_old(#valid)_BEFORE_CALL_3| |v_old(#length)_BEFORE_CALL_3|)) (= 2 (select |v_old(#length)_BEFORE_CALL_3| 1)) (= (select |v_old(#length)_BEFORE_CALL_3| 3) 4000000) (not (= |v_old(#length)_BEFORE_CALL_3| (select |v_old(#memory_int)_BEFORE_CALL_3| 1))) (not (= |v_old(#valid)_BEFORE_CALL_3| (select |v_old(#memory_int)_BEFORE_CALL_3| 1))) (= (select |v_old(#valid)_BEFORE_CALL_3| 2) 1) (= 19 (select |v_old(#length)_BEFORE_CALL_3| 2)) (= (select |v_old(#valid)_BEFORE_CALL_3| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_3| 3) 1))) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (or (not (= (select (select |#memory_$Pointer$.base| 3) 0) 0)) (not (= (select (select |#memory_$Pointer$.offset| 3) 0) 0))) (= |#NULL.base| 0))' at error location [2023-04-01 09:03:12,801 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:03:12,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 09:03:12,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-01 09:03:12,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439721910] [2023-04-01 09:03:12,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 09:03:12,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 09:03:12,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:03:12,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 09:03:12,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 09:03:12,803 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:03:13,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:03:13,222 INFO L93 Difference]: Finished difference Result 156 states and 213 transitions. [2023-04-01 09:03:13,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 09:03:13,222 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-04-01 09:03:13,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:03:13,223 INFO L225 Difference]: With dead ends: 156 [2023-04-01 09:03:13,223 INFO L226 Difference]: Without dead ends: 145 [2023-04-01 09:03:13,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 09:03:13,225 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 251 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 09:03:13,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 109 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 09:03:13,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-04-01 09:03:13,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 39. [2023-04-01 09:03:13,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:03:13,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2023-04-01 09:03:13,233 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 22 [2023-04-01 09:03:13,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:03:13,233 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2023-04-01 09:03:13,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:03:13,233 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2023-04-01 09:03:13,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 09:03:13,234 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:03:13,234 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:03:13,247 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 09:03:13,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:03:13,440 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:03:13,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:03:13,440 INFO L85 PathProgramCache]: Analyzing trace with hash -608193257, now seen corresponding path program 4 times [2023-04-01 09:03:13,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:03:13,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318828557] [2023-04-01 09:03:13,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:03:13,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:03:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:03:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:03:14,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:03:14,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318828557] [2023-04-01 09:03:14,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318828557] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:03:14,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463923425] [2023-04-01 09:03:14,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 09:03:14,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:03:14,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:03:14,544 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 09:03:14,545 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 09:03:14,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:03:14,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-01 09:03:14,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:03:14,901 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:03:14,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:03:15,487 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:03:15,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463923425] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:03:15,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [604201920] [2023-04-01 09:03:15,489 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 09:03:15,489 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:03:15,489 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:03:15,489 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:03:15,489 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:03:15,530 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 59 for LOIs [2023-04-01 09:03:15,942 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 118 for LOIs [2023-04-01 09:03:15,968 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 19 for LOIs [2023-04-01 09:03:15,972 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:03:16,883 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1305#(and (exists ((|v_#memory_$Pointer$.offset_282| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.offset_282| 3 (store (select |v_#memory_$Pointer$.offset_282| 3) 12 0)) |#memory_$Pointer$.offset|)) (exists ((|v_#memory_$Pointer$.base_282| (Array Int (Array Int Int))) (|v_#length_170| (Array Int Int)) (|v_main_#t~malloc6.base_5| Int) (|v_#valid_170| (Array Int Int))) (and (not (= 0 |v_main_#t~malloc6.base_5|)) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_282| 3 (store (select |v_#memory_$Pointer$.base_282| 3) 12 |v_main_#t~malloc6.base_5|))) (= (store |v_#length_170| |v_main_#t~malloc6.base_5| 8) |#length|) (< |v_main_#t~malloc6.base_5| |#StackHeapBarrier|) (= (store |v_#valid_170| |v_main_#t~malloc6.base_5| 1) |#valid|) (= (select |v_#valid_170| |v_main_#t~malloc6.base_5|) 0))) (exists ((|v_old(#memory_int)_BEFORE_CALL_4| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_4| (Array Int Int)) (|v_old(#length)_BEFORE_CALL_4| (Array Int Int))) (and (= (select |v_old(#length)_BEFORE_CALL_4| 1) 2) (= (select |v_old(#length)_BEFORE_CALL_4| 2) 19) (= (select |v_old(#valid)_BEFORE_CALL_4| 1) 1) (= (select |v_old(#length)_BEFORE_CALL_4| 3) 4000000) (= (select |v_old(#valid)_BEFORE_CALL_4| 0) 0) (not (= |v_old(#valid)_BEFORE_CALL_4| |v_old(#length)_BEFORE_CALL_4|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_4| 1) |v_old(#length)_BEFORE_CALL_4|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_4| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_4| 3) 1) (not (= |v_old(#valid)_BEFORE_CALL_4| (select |v_old(#memory_int)_BEFORE_CALL_4| 1))) (= (select |v_old(#valid)_BEFORE_CALL_4| 2) 1) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_4| 1) 0)))) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| 3) 0)) (select (select |#memory_$Pointer$.offset| 3) 0)) 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= 3 |~#a~0.base|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| 3) 0)) (select (select |#memory_$Pointer$.offset| 3) 0)) 0) (= (select (select |#memory_int| (select (select |#memory_$Pointer$.base| 3) 0)) (+ (select (select |#memory_$Pointer$.offset| 3) 0) 4)) 0) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (or (not (= (select (select |#memory_$Pointer$.base| 3) 0) 0)) (not (= (select (select |#memory_$Pointer$.offset| 3) 0) 0))) (= |#NULL.base| 0))' at error location [2023-04-01 09:03:16,883 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:03:16,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 09:03:16,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-04-01 09:03:16,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630096471] [2023-04-01 09:03:16,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 09:03:16,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-01 09:03:16,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:03:16,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-01 09:03:16,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1350, Invalid=2190, Unknown=0, NotChecked=0, Total=3540 [2023-04-01 09:03:16,886 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:03:17,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:03:17,724 INFO L93 Difference]: Finished difference Result 300 states and 417 transitions. [2023-04-01 09:03:17,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-01 09:03:17,724 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2023-04-01 09:03:17,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:03:17,728 INFO L225 Difference]: With dead ends: 300 [2023-04-01 09:03:17,728 INFO L226 Difference]: Without dead ends: 289 [2023-04-01 09:03:17,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1350, Invalid=2190, Unknown=0, NotChecked=0, Total=3540 [2023-04-01 09:03:17,730 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 550 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 09:03:17,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [596 Valid, 210 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 09:03:17,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-04-01 09:03:17,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 63. [2023-04-01 09:03:17,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:03:17,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2023-04-01 09:03:17,758 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 34 [2023-04-01 09:03:17,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:03:17,758 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2023-04-01 09:03:17,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:03:17,758 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2023-04-01 09:03:17,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 09:03:17,761 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:03:17,761 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:03:17,770 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 09:03:17,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:03:17,968 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:03:17,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:03:17,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1153196009, now seen corresponding path program 5 times [2023-04-01 09:03:17,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:03:17,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114741521] [2023-04-01 09:03:17,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:03:17,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:03:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:03:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:03:21,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:03:21,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114741521] [2023-04-01 09:03:21,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114741521] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:03:21,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488897177] [2023-04-01 09:03:21,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:03:21,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:03:21,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:03:21,872 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 09:03:21,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process