/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-examples/standard_running-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 14:12:57,097 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 14:12:57,098 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 14:12:57,126 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 14:12:57,126 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 14:12:57,127 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 14:12:57,127 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 14:12:57,128 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 14:12:57,131 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 14:12:57,132 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 14:12:57,132 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 14:12:57,133 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 14:12:57,133 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 14:12:57,134 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 14:12:57,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 14:12:57,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 14:12:57,136 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 14:12:57,139 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 14:12:57,141 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 14:12:57,143 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 14:12:57,144 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 14:12:57,146 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 14:12:57,147 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 14:12:57,148 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 14:12:57,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 14:12:57,151 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 14:12:57,151 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 14:12:57,152 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 14:12:57,152 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 14:12:57,155 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 14:12:57,155 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 14:12:57,155 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 14:12:57,156 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 14:12:57,156 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 14:12:57,157 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 14:12:57,157 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 14:12:57,157 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 14:12:57,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 14:12:57,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 14:12:57,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 14:12:57,158 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 14:12:57,160 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 14:12:57,182 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 14:12:57,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 14:12:57,183 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 14:12:57,183 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 14:12:57,183 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 14:12:57,183 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 14:12:57,183 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 14:12:57,184 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 14:12:57,184 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 14:12:57,184 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 14:12:57,184 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 14:12:57,184 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 14:12:57,184 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 14:12:57,185 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 14:12:57,185 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 14:12:57,185 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 14:12:57,185 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 14:12:57,185 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 14:12:57,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 14:12:57,185 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 14:12:57,185 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 14:12:57,185 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 14:12:57,185 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 14:12:57,186 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 14:12:57,186 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 14:12:57,186 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 14:12:57,186 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 14:12:57,186 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 14:12:57,186 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 14:12:57,186 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 14:12:57,187 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 14:12:57,187 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 14:12:57,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:12:57,187 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 14:12:57,187 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 14:12:57,187 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 14:12:57,187 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 14:12:57,187 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 14:12:57,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 14:12:57,187 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 14:12:57,187 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 14:12:57,187 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 14:12:57,361 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 14:12:57,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 14:12:57,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 14:12:57,381 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 14:12:57,382 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 14:12:57,382 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_running-2.i [2023-04-02 14:12:58,350 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 14:12:58,541 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 14:12:58,541 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_running-2.i [2023-04-02 14:12:58,544 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98aa85ee3/bc2dcc251932438f88f8b29c556aa644/FLAGda2313fc7 [2023-04-02 14:12:58,557 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98aa85ee3/bc2dcc251932438f88f8b29c556aa644 [2023-04-02 14:12:58,558 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 14:12:58,559 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 14:12:58,561 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 14:12:58,561 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 14:12:58,563 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 14:12:58,564 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:12:58" (1/1) ... [2023-04-02 14:12:58,565 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43667dcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:12:58, skipping insertion in model container [2023-04-02 14:12:58,565 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:12:58" (1/1) ... [2023-04-02 14:12:58,569 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 14:12:58,578 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 14:12:58,690 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-examples/standard_running-2.i[811,824] [2023-04-02 14:12:58,705 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:12:58,715 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 14:12:58,724 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-examples/standard_running-2.i[811,824] [2023-04-02 14:12:58,740 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:12:58,755 INFO L208 MainTranslator]: Completed translation [2023-04-02 14:12:58,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:12:58 WrapperNode [2023-04-02 14:12:58,755 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 14:12:58,756 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 14:12:58,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 14:12:58,756 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 14:12:58,764 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:12:58" (1/1) ... [2023-04-02 14:12:58,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:12:58" (1/1) ... [2023-04-02 14:12:58,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:12:58" (1/1) ... [2023-04-02 14:12:58,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:12:58" (1/1) ... [2023-04-02 14:12:58,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:12:58" (1/1) ... [2023-04-02 14:12:58,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:12:58" (1/1) ... [2023-04-02 14:12:58,777 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:12:58" (1/1) ... [2023-04-02 14:12:58,777 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:12:58" (1/1) ... [2023-04-02 14:12:58,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 14:12:58,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 14:12:58,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 14:12:58,780 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 14:12:58,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:12:58" (1/1) ... [2023-04-02 14:12:58,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:12:58,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:12:58,805 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 14:12:58,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 14:12:58,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 14:12:58,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 14:12:58,839 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 14:12:58,839 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 14:12:58,839 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 14:12:58,839 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 14:12:58,839 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 14:12:58,839 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 14:12:58,839 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 14:12:58,839 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 14:12:58,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 14:12:58,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 14:12:58,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 14:12:58,840 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 14:12:58,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 14:12:58,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 14:12:58,840 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 14:12:58,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 14:12:58,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 14:12:58,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 14:12:58,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 14:12:58,924 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 14:12:58,926 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 14:12:59,153 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 14:12:59,263 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 14:12:59,263 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-02 14:12:59,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:12:59 BoogieIcfgContainer [2023-04-02 14:12:59,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 14:12:59,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 14:12:59,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 14:12:59,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 14:12:59,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:12:58" (1/3) ... [2023-04-02 14:12:59,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dc9e10c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:12:59, skipping insertion in model container [2023-04-02 14:12:59,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:12:58" (2/3) ... [2023-04-02 14:12:59,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dc9e10c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:12:59, skipping insertion in model container [2023-04-02 14:12:59,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:12:59" (3/3) ... [2023-04-02 14:12:59,271 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_running-2.i [2023-04-02 14:12:59,290 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 14:12:59,290 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 14:12:59,331 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 14:12:59,335 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;@6e6e6585, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 14:12:59,335 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 14:12:59,338 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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) [2023-04-02 14:12:59,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-02 14:12:59,343 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:12:59,344 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:12:59,344 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:12:59,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:12:59,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1828486361, now seen corresponding path program 1 times [2023-04-02 14:12:59,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:12:59,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36701778] [2023-04-02 14:12:59,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:12:59,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:12:59,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:12:59,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:12:59,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:12:59,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36701778] [2023-04-02 14:12:59,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36701778] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:12:59,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:12:59,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 14:12:59,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382068019] [2023-04-02 14:12:59,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:12:59,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 14:12:59,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:12:59,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 14:12:59,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:12:59,549 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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) [2023-04-02 14:12:59,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:12:59,598 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2023-04-02 14:12:59,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 14:12:59,601 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 [2023-04-02 14:12:59,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:12:59,605 INFO L225 Difference]: With dead ends: 35 [2023-04-02 14:12:59,605 INFO L226 Difference]: Without dead ends: 16 [2023-04-02 14:12:59,607 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 [2023-04-02 14:12:59,609 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:12:59,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:12:59,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-04-02 14:12:59,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-04-02 14:12:59,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:12:59,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2023-04-02 14:12:59,631 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2023-04-02 14:12:59,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:12:59,632 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2023-04-02 14:12:59,632 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) [2023-04-02 14:12:59,633 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2023-04-02 14:12:59,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 14:12:59,633 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:12:59,633 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:12:59,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 14:12:59,634 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:12:59,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:12:59,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1952487926, now seen corresponding path program 1 times [2023-04-02 14:12:59,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:12:59,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390370406] [2023-04-02 14:12:59,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:12:59,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:12:59,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:12:59,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 14:12:59,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:12:59,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390370406] [2023-04-02 14:12:59,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390370406] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:12:59,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284057627] [2023-04-02 14:12:59,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:12:59,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:12:59,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:12:59,715 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:12:59,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 14:12:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:12:59,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 14:12:59,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:12:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 14:12:59,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:12:59,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 14:12:59,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284057627] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:12:59,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1474780673] [2023-04-02 14:12:59,890 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:12:59,890 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:12:59,892 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:12:59,895 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:12:59,895 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:12:59,955 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:13:00,288 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-02 14:13:00,294 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:13:00,302 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:13:00,460 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '198#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:13:00,461 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:13:00,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:13:00,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 14:13:00,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563790834] [2023-04-02 14:13:00,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:13:00,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 14:13:00,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:13:00,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 14:13:00,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2023-04-02 14:13:00,463 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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) [2023-04-02 14:13:00,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:13:00,494 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2023-04-02 14:13:00,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 14:13:00,494 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 15 [2023-04-02 14:13:00,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:13:00,495 INFO L225 Difference]: With dead ends: 34 [2023-04-02 14:13:00,495 INFO L226 Difference]: Without dead ends: 25 [2023-04-02 14:13:00,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2023-04-02 14:13:00,496 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:13:00,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:13:00,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-02 14:13:00,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-04-02 14:13:00,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:13:00,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2023-04-02 14:13:00,500 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 15 [2023-04-02 14:13:00,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:13:00,500 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2023-04-02 14:13:00,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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) [2023-04-02 14:13:00,500 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2023-04-02 14:13:00,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-02 14:13:00,501 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:13:00,501 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:13:00,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 14:13:00,705 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 [2023-04-02 14:13:00,708 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:13:00,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:13:00,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1582051047, now seen corresponding path program 2 times [2023-04-02 14:13:00,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:13:00,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497580319] [2023-04-02 14:13:00,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:13:00,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:13:00,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:13:00,888 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 14:13:00,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:13:00,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497580319] [2023-04-02 14:13:00,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497580319] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:13:00,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129552372] [2023-04-02 14:13:00,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:13:00,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:13:00,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:13:00,890 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:13:00,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 14:13:00,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 14:13:00,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:13:00,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 14:13:00,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:13:00,998 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 14:13:00,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:13:01,037 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 14:13:01,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129552372] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:13:01,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1565000540] [2023-04-02 14:13:01,039 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:13:01,039 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:13:01,039 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:13:01,039 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:13:01,039 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:13:01,053 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:13:01,207 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-02 14:13:01,209 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:13:01,212 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:13:01,374 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '467#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:13:01,375 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:13:01,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:13:01,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-02 14:13:01,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218912512] [2023-04-02 14:13:01,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:13:01,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 14:13:01,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:13:01,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 14:13:01,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2023-04-02 14:13:01,376 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 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) [2023-04-02 14:13:01,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:13:01,436 INFO L93 Difference]: Finished difference Result 58 states and 79 transitions. [2023-04-02 14:13:01,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 14:13:01,436 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 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 24 [2023-04-02 14:13:01,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:13:01,437 INFO L225 Difference]: With dead ends: 58 [2023-04-02 14:13:01,437 INFO L226 Difference]: Without dead ends: 43 [2023-04-02 14:13:01,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2023-04-02 14:13:01,438 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:13:01,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:13:01,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-04-02 14:13:01,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-04-02 14:13:01,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:13:01,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2023-04-02 14:13:01,442 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 24 [2023-04-02 14:13:01,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:13:01,443 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2023-04-02 14:13:01,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 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) [2023-04-02 14:13:01,443 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2023-04-02 14:13:01,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-02 14:13:01,443 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:13:01,444 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:13:01,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-02 14:13:01,648 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 [2023-04-02 14:13:01,649 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:13:01,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:13:01,649 INFO L85 PathProgramCache]: Analyzing trace with hash 153183097, now seen corresponding path program 3 times [2023-04-02 14:13:01,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:13:01,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996782482] [2023-04-02 14:13:01,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:13:01,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:13:01,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:13:01,937 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-02 14:13:01,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:13:01,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996782482] [2023-04-02 14:13:01,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996782482] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:13:01,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127465057] [2023-04-02 14:13:01,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:13:01,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:13:01,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:13:01,938 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:13:01,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 14:13:02,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:13:02,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:13:02,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 14:13:02,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:13:02,075 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-02 14:13:02,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:13:02,216 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-02 14:13:02,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127465057] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:13:02,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [600983534] [2023-04-02 14:13:02,217 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:13:02,217 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:13:02,218 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:13:02,218 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:13:02,218 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:13:02,230 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:13:02,365 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-02 14:13:02,368 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:13:02,370 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:13:02,545 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '940#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:13:02,545 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:13:02,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:13:02,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-02 14:13:02,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669306907] [2023-04-02 14:13:02,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:13:02,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 14:13:02,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:13:02,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 14:13:02,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=732, Unknown=0, NotChecked=0, Total=1056 [2023-04-02 14:13:02,547 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 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) [2023-04-02 14:13:02,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:13:02,710 INFO L93 Difference]: Finished difference Result 106 states and 145 transitions. [2023-04-02 14:13:02,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 14:13:02,710 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 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 42 [2023-04-02 14:13:02,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:13:02,712 INFO L225 Difference]: With dead ends: 106 [2023-04-02 14:13:02,712 INFO L226 Difference]: Without dead ends: 79 [2023-04-02 14:13:02,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=324, Invalid=732, Unknown=0, NotChecked=0, Total=1056 [2023-04-02 14:13:02,715 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:13:02,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:13:02,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-04-02 14:13:02,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-04-02 14:13:02,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:13:02,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2023-04-02 14:13:02,735 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 42 [2023-04-02 14:13:02,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:13:02,735 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2023-04-02 14:13:02,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 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) [2023-04-02 14:13:02,735 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2023-04-02 14:13:02,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-02 14:13:02,738 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:13:02,738 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:13:02,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 14:13:02,944 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 [2023-04-02 14:13:02,944 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:13:02,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:13:02,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1980248007, now seen corresponding path program 4 times [2023-04-02 14:13:02,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:13:02,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064226738] [2023-04-02 14:13:02,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:13:02,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:13:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:13:03,836 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2023-04-02 14:13:03,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:13:03,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064226738] [2023-04-02 14:13:03,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064226738] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:13:03,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223873212] [2023-04-02 14:13:03,837 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:13:03,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:13:03,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:13:03,862 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:13:03,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 14:13:04,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:13:04,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-02 14:13:04,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:13:04,099 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2023-04-02 14:13:04,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:13:04,668 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2023-04-02 14:13:04,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223873212] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:13:04,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1987932769] [2023-04-02 14:13:04,670 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:13:04,670 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:13:04,670 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:13:04,671 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:13:04,671 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:13:04,682 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:13:04,845 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-02 14:13:04,847 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:13:04,850 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:13:05,056 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1821#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:13:05,056 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:13:05,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:13:05,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-04-02 14:13:05,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037765288] [2023-04-02 14:13:05,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:13:05,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-02 14:13:05,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:13:05,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-02 14:13:05,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1200, Invalid=1992, Unknown=0, NotChecked=0, Total=3192 [2023-04-02 14:13:05,061 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 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) [2023-04-02 14:13:05,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:13:05,354 INFO L93 Difference]: Finished difference Result 202 states and 277 transitions. [2023-04-02 14:13:05,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-02 14:13:05,355 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 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 78 [2023-04-02 14:13:05,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:13:05,357 INFO L225 Difference]: With dead ends: 202 [2023-04-02 14:13:05,357 INFO L226 Difference]: Without dead ends: 151 [2023-04-02 14:13:05,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1200, Invalid=1992, Unknown=0, NotChecked=0, Total=3192 [2023-04-02 14:13:05,359 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 14:13:05,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 14:13:05,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-04-02 14:13:05,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2023-04-02 14:13:05,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0205479452054795) internal successors, (149), 146 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:13:05,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2023-04-02 14:13:05,382 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 78 [2023-04-02 14:13:05,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:13:05,383 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2023-04-02 14:13:05,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 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) [2023-04-02 14:13:05,383 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2023-04-02 14:13:05,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-04-02 14:13:05,388 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:13:05,388 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:13:05,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 14:13:05,594 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 [2023-04-02 14:13:05,595 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:13:05,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:13:05,595 INFO L85 PathProgramCache]: Analyzing trace with hash 587844025, now seen corresponding path program 5 times [2023-04-02 14:13:05,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:13:05,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236666640] [2023-04-02 14:13:05,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:13:05,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:13:05,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:13:08,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2023-04-02 14:13:08,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:13:08,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236666640] [2023-04-02 14:13:08,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236666640] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:13:08,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609255442] [2023-04-02 14:13:08,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:13:08,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:13:08,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:13:08,047 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:13:08,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process