/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_copy6_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 13:58:46,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 13:58:46,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 13:58:46,146 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 13:58:46,147 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 13:58:46,147 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 13:58:46,148 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 13:58:46,149 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 13:58:46,150 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 13:58:46,151 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 13:58:46,152 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 13:58:46,152 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 13:58:46,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 13:58:46,155 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 13:58:46,155 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 13:58:46,156 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 13:58:46,156 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 13:58:46,157 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 13:58:46,158 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 13:58:46,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 13:58:46,160 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 13:58:46,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 13:58:46,162 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 13:58:46,163 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 13:58:46,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 13:58:46,165 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 13:58:46,166 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 13:58:46,166 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 13:58:46,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 13:58:46,167 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 13:58:46,167 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 13:58:46,168 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 13:58:46,169 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 13:58:46,169 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 13:58:46,170 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 13:58:46,170 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 13:58:46,170 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 13:58:46,171 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 13:58:46,171 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 13:58:46,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 13:58:46,172 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 13:58:46,173 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 13:58:46,188 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 13:58:46,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 13:58:46,188 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 13:58:46,188 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 13:58:46,189 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 13:58:46,189 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 13:58:46,189 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 13:58:46,189 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 13:58:46,189 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 13:58:46,189 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 13:58:46,190 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 13:58:46,190 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 13:58:46,190 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 13:58:46,190 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 13:58:46,190 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 13:58:46,191 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 13:58:46,191 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 13:58:46,191 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 13:58:46,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 13:58:46,192 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 13:58:46,192 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 13:58:46,192 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 13:58:46,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 13:58:46,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 13:58:46,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 13:58:46,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 13:58:46,192 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 13:58:46,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 13:58:46,192 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 13:58:46,192 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 13:58:46,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 13:58:46,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 13:58:46,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 13:58:46,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 13:58:46,193 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 13:58:46,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 13:58:46,194 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 13:58:46,194 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 13:58:46,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 13:58:46,194 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 13:58:46,194 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 13:58:46,194 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 13:58:46,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 13:58:46,401 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 13:58:46,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 13:58:46,403 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 13:58:46,404 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 13:58:46,405 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy6_ground-1.i [2023-04-02 13:58:47,449 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 13:58:47,578 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 13:58:47,578 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy6_ground-1.i [2023-04-02 13:58:47,584 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95aab249d/b669e2ae42044d05b07ee9debcc3720d/FLAG1fd603350 [2023-04-02 13:58:47,597 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95aab249d/b669e2ae42044d05b07ee9debcc3720d [2023-04-02 13:58:47,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 13:58:47,600 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 13:58:47,601 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 13:58:47,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 13:58:47,603 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 13:58:47,604 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:58:47" (1/1) ... [2023-04-02 13:58:47,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58a39d6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:47, skipping insertion in model container [2023-04-02 13:58:47,605 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:58:47" (1/1) ... [2023-04-02 13:58:47,609 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 13:58:47,622 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 13:58:47,734 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_copy6_ground-1.i[816,829] [2023-04-02 13:58:47,764 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 13:58:47,771 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 13:58:47,781 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_copy6_ground-1.i[816,829] [2023-04-02 13:58:47,804 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 13:58:47,817 INFO L208 MainTranslator]: Completed translation [2023-04-02 13:58:47,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:47 WrapperNode [2023-04-02 13:58:47,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 13:58:47,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 13:58:47,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 13:58:47,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 13:58:47,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:47" (1/1) ... [2023-04-02 13:58:47,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:47" (1/1) ... [2023-04-02 13:58:47,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:47" (1/1) ... [2023-04-02 13:58:47,839 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:47" (1/1) ... [2023-04-02 13:58:47,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:47" (1/1) ... [2023-04-02 13:58:47,862 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:47" (1/1) ... [2023-04-02 13:58:47,864 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:47" (1/1) ... [2023-04-02 13:58:47,864 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:47" (1/1) ... [2023-04-02 13:58:47,866 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 13:58:47,866 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 13:58:47,867 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 13:58:47,867 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 13:58:47,867 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:47" (1/1) ... [2023-04-02 13:58:47,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 13:58:47,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:58:47,913 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 13:58:47,927 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 13:58:47,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 13:58:47,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 13:58:47,960 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 13:58:47,961 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 13:58:47,961 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 13:58:47,962 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 13:58:47,962 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 13:58:47,962 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 13:58:47,962 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 13:58:47,962 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 13:58:47,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 13:58:47,962 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 13:58:47,962 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 13:58:47,962 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 13:58:47,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 13:58:47,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 13:58:47,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 13:58:47,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 13:58:47,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 13:58:47,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 13:58:47,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 13:58:48,033 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 13:58:48,034 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 13:58:48,228 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 13:58:48,266 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 13:58:48,266 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-04-02 13:58:48,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:58:48 BoogieIcfgContainer [2023-04-02 13:58:48,268 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 13:58:48,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 13:58:48,269 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 13:58:48,272 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 13:58:48,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 01:58:47" (1/3) ... [2023-04-02 13:58:48,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79f34881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:58:48, skipping insertion in model container [2023-04-02 13:58:48,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:58:47" (2/3) ... [2023-04-02 13:58:48,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79f34881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:58:48, skipping insertion in model container [2023-04-02 13:58:48,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:58:48" (3/3) ... [2023-04-02 13:58:48,273 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy6_ground-1.i [2023-04-02 13:58:48,284 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 13:58:48,285 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 13:58:48,315 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 13:58:48,319 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;@8002560, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 13:58:48,319 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 13:58:48,322 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 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 13:58:48,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-02 13:58:48,327 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:58:48,327 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:58:48,327 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:58:48,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:58:48,330 INFO L85 PathProgramCache]: Analyzing trace with hash -627708306, now seen corresponding path program 1 times [2023-04-02 13:58:48,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:58:48,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512116591] [2023-04-02 13:58:48,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:48,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:58:48,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:48,602 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 13:58:48,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:58:48,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512116591] [2023-04-02 13:58:48,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512116591] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 13:58:48,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 13:58:48,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 13:58:48,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298100883] [2023-04-02 13:58:48,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 13:58:48,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 13:58:48,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:58:48,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 13:58:48,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 13:58:48,641 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 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 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 13:58:48,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:58:48,690 INFO L93 Difference]: Finished difference Result 43 states and 60 transitions. [2023-04-02 13:58:48,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 13:58:48,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (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 17 [2023-04-02 13:58:48,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:58:48,697 INFO L225 Difference]: With dead ends: 43 [2023-04-02 13:58:48,697 INFO L226 Difference]: Without dead ends: 22 [2023-04-02 13:58:48,699 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 13:58:48,702 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:58:48,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:58:48,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-02 13:58:48,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-02 13:58:48,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2023-04-02 13:58:48,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2023-04-02 13:58:48,727 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 17 [2023-04-02 13:58:48,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:58:48,727 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2023-04-02 13:58:48,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (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 13:58:48,727 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2023-04-02 13:58:48,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 13:58:48,728 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:58:48,728 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:58:48,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 13:58:48,728 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:58:48,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:58:48,729 INFO L85 PathProgramCache]: Analyzing trace with hash 864931605, now seen corresponding path program 1 times [2023-04-02 13:58:48,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:58:48,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068117726] [2023-04-02 13:58:48,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:48,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:58:48,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 13:58:48,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:58:48,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068117726] [2023-04-02 13:58:48,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068117726] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 13:58:48,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 13:58:48,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 13:58:48,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679057581] [2023-04-02 13:58:48,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 13:58:48,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 13:58:48,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:58:48,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 13:58:48,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 13:58:48,798 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2023-04-02 13:58:48,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:58:48,827 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2023-04-02 13:58:48,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 13:58:48,827 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 18 [2023-04-02 13:58:48,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:58:48,828 INFO L225 Difference]: With dead ends: 42 [2023-04-02 13:58:48,828 INFO L226 Difference]: Without dead ends: 28 [2023-04-02 13:58:48,829 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 13:58:48,829 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:58:48,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:58:48,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-02 13:58:48,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-02 13:58:48,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 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) [2023-04-02 13:58:48,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2023-04-02 13:58:48,834 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 18 [2023-04-02 13:58:48,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:58:48,834 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2023-04-02 13:58:48,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2023-04-02 13:58:48,835 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2023-04-02 13:58:48,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-02 13:58:48,835 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:58:48,835 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:58:48,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 13:58:48,836 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:58:48,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:58:48,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1314296630, now seen corresponding path program 1 times [2023-04-02 13:58:48,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:58:48,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820695726] [2023-04-02 13:58:48,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:48,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:58:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 13:58:48,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:58:48,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820695726] [2023-04-02 13:58:48,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820695726] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:58:48,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536410623] [2023-04-02 13:58:48,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:48,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:48,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:58:48,921 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 13:58:48,939 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 13:58:49,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:49,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 13:58:49,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:58:49,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 13:58:49,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:58:49,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 13:58:49,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536410623] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:58:49,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1115369662] [2023-04-02 13:58:49,086 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 13:58:49,086 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:58:49,090 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:58:49,094 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:58:49,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:58:49,167 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:58:49,260 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-02 13:58:49,401 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-02 13:58:51,173 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:58:51,205 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:58:51,208 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:58:52,376 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '405#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a1~0.base_BEFORE_CALL_1| Int) (|v_main_~#a7~0.base_BEFORE_CALL_1| Int)) (and (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_1|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a7~0.base_BEFORE_CALL_1|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_1|) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_1|) (<= 4 (+ |v_main_~#a1~0.base_BEFORE_CALL_1| |v_main_~#a7~0.base_BEFORE_CALL_1|)) (<= 2 |v_main_~#a7~0.base_BEFORE_CALL_1|) (not (= (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_1|) 0) (select (select |#memory_int| |v_main_~#a7~0.base_BEFORE_CALL_1|) 0))) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a7~0.base_BEFORE_CALL_1|)))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:58:52,377 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:58:52,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:58:52,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 13:58:52,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648127177] [2023-04-02 13:58:52,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:58:52,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 13:58:52,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:58:52,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 13:58:52,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-04-02 13:58:52,379 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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 13:58:52,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:58:52,426 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2023-04-02 13:58:52,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 13:58:52,426 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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 13:58:52,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:58:52,427 INFO L225 Difference]: With dead ends: 52 [2023-04-02 13:58:52,427 INFO L226 Difference]: Without dead ends: 31 [2023-04-02 13:58:52,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-04-02 13:58:52,429 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:58:52,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:58:52,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-02 13:58:52,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-04-02 13:58:52,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 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) [2023-04-02 13:58:52,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2023-04-02 13:58:52,434 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 24 [2023-04-02 13:58:52,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:58:52,434 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2023-04-02 13:58:52,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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 13:58:52,435 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2023-04-02 13:58:52,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-02 13:58:52,435 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:58:52,436 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:58:52,445 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 13:58:52,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:52,643 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:58:52,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:58:52,643 INFO L85 PathProgramCache]: Analyzing trace with hash -410843357, now seen corresponding path program 2 times [2023-04-02 13:58:52,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:58:52,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042264800] [2023-04-02 13:58:52,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:52,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:58:52,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:52,749 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 13:58:52,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:58:52,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042264800] [2023-04-02 13:58:52,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042264800] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:58:52,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399780274] [2023-04-02 13:58:52,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 13:58:52,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:52,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:58:52,751 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 13:58:52,768 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 13:58:52,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 13:58:52,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:58:52,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 13:58:52,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:58:52,875 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 13:58:52,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:58:52,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 13:58:52,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399780274] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:58:52,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1613603930] [2023-04-02 13:58:52,891 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 13:58:52,891 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:58:52,891 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:58:52,891 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:58:52,892 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:58:52,908 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:58:52,944 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-02 13:58:52,987 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-02 13:58:54,188 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:58:54,206 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:58:54,208 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:58:55,282 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '728#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#a1~0.base_BEFORE_CALL_2| Int) (|v_main_~#a7~0.base_BEFORE_CALL_2| Int)) (and (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_2|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a7~0.base_BEFORE_CALL_2|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a7~0.base_BEFORE_CALL_2|) (<= 2 |v_main_~#a7~0.base_BEFORE_CALL_2|) (not (= (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_2|) 0) (select (select |#memory_int| |v_main_~#a7~0.base_BEFORE_CALL_2|) 0))) (<= 4 (+ |v_main_~#a1~0.base_BEFORE_CALL_2| |v_main_~#a7~0.base_BEFORE_CALL_2|)) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_2|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_2|))) (= |#NULL.base| 0))' at error location [2023-04-02 13:58:55,282 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:58:55,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:58:55,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 13:58:55,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128449135] [2023-04-02 13:58:55,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:58:55,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 13:58:55,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:58:55,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 13:58:55,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-04-02 13:58:55,284 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2023-04-02 13:58:55,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:58:55,338 INFO L93 Difference]: Finished difference Result 68 states and 98 transitions. [2023-04-02 13:58:55,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 13:58:55,339 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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 27 [2023-04-02 13:58:55,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:58:55,339 INFO L225 Difference]: With dead ends: 68 [2023-04-02 13:58:55,339 INFO L226 Difference]: Without dead ends: 49 [2023-04-02 13:58:55,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-04-02 13:58:55,340 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:58:55,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:58:55,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-04-02 13:58:55,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-04-02 13:58:55,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 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) [2023-04-02 13:58:55,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2023-04-02 13:58:55,345 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 27 [2023-04-02 13:58:55,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:58:55,345 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2023-04-02 13:58:55,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2023-04-02 13:58:55,345 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2023-04-02 13:58:55,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-02 13:58:55,346 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:58:55,346 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:58:55,351 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 13:58:55,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-02 13:58:55,553 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:58:55,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:58:55,553 INFO L85 PathProgramCache]: Analyzing trace with hash 275021550, now seen corresponding path program 3 times [2023-04-02 13:58:55,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:58:55,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044651354] [2023-04-02 13:58:55,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:55,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:58:55,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:55,706 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-02 13:58:55,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:58:55,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044651354] [2023-04-02 13:58:55,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044651354] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:58:55,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219018603] [2023-04-02 13:58:55,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 13:58:55,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:55,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:58:55,723 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 13:58:55,724 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 13:58:55,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 13:58:55,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:58:55,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 13:58:55,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:58:55,861 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-02 13:58:55,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:58:55,906 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-02 13:58:55,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219018603] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:58:55,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [448342326] [2023-04-02 13:58:55,908 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 13:58:55,908 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:58:55,908 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:58:55,908 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:58:55,909 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:58:55,926 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:58:55,974 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-02 13:58:56,039 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-02 13:58:57,101 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:58:57,110 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:58:57,118 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:58:58,093 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1233#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a1~0.base_BEFORE_CALL_3| Int) (|v_main_~#a7~0.base_BEFORE_CALL_3| Int)) (and (<= 4 (+ |v_main_~#a1~0.base_BEFORE_CALL_3| |v_main_~#a7~0.base_BEFORE_CALL_3|)) (<= 2 |v_main_~#a7~0.base_BEFORE_CALL_3|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_3|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_3|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a7~0.base_BEFORE_CALL_3|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a7~0.base_BEFORE_CALL_3|)) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_3|) (not (= (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_3|) 0) (select (select |#memory_int| |v_main_~#a7~0.base_BEFORE_CALL_3|) 0))))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:58:58,093 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:58:58,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:58:58,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-02 13:58:58,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227481735] [2023-04-02 13:58:58,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:58:58,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 13:58:58,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:58:58,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 13:58:58,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2023-04-02 13:58:58,095 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 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 13:58:58,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:58:58,130 INFO L93 Difference]: Finished difference Result 94 states and 113 transitions. [2023-04-02 13:58:58,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 13:58:58,130 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 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 45 [2023-04-02 13:58:58,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:58:58,130 INFO L225 Difference]: With dead ends: 94 [2023-04-02 13:58:58,130 INFO L226 Difference]: Without dead ends: 55 [2023-04-02 13:58:58,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2023-04-02 13:58:58,132 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:58:58,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:58:58,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-04-02 13:58:58,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-04-02 13:58:58,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 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) [2023-04-02 13:58:58,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2023-04-02 13:58:58,137 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 45 [2023-04-02 13:58:58,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:58:58,137 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2023-04-02 13:58:58,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 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 13:58:58,137 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2023-04-02 13:58:58,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-02 13:58:58,138 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:58:58,138 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:58:58,144 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 13:58:58,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:58,343 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:58:58,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:58:58,344 INFO L85 PathProgramCache]: Analyzing trace with hash -521968242, now seen corresponding path program 4 times [2023-04-02 13:58:58,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:58:58,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946046915] [2023-04-02 13:58:58,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:58:58,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:58:58,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:58,642 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-02 13:58:58,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:58:58,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946046915] [2023-04-02 13:58:58,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946046915] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:58:58,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001346020] [2023-04-02 13:58:58,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 13:58:58,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:58:58,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:58:58,661 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 13:58:58,673 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 13:58:58,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:58:58,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 13:58:58,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:58:58,856 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-02 13:58:58,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:58:59,015 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-02 13:58:59,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001346020] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:58:59,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1207042705] [2023-04-02 13:58:59,017 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 13:58:59,017 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:58:59,018 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:58:59,018 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:58:59,018 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:58:59,028 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:58:59,057 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-02 13:58:59,089 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-02 13:59:00,105 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:59:00,118 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:59:00,120 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:59:01,028 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1850#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#a1~0.base_BEFORE_CALL_4| Int) (|v_main_~#a7~0.base_BEFORE_CALL_4| Int)) (and (not (= (select (select |#memory_int| |v_main_~#a7~0.base_BEFORE_CALL_4|) 0) (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_4|) 0))) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_4|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a7~0.base_BEFORE_CALL_4|)) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_4|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a7~0.base_BEFORE_CALL_4|) (<= 4 (+ |v_main_~#a1~0.base_BEFORE_CALL_4| |v_main_~#a7~0.base_BEFORE_CALL_4|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_4|) (<= 2 |v_main_~#a7~0.base_BEFORE_CALL_4|))) (= |#NULL.base| 0))' at error location [2023-04-02 13:59:01,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:59:01,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:59:01,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-02 13:59:01,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879728158] [2023-04-02 13:59:01,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:59:01,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 13:59:01,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:59:01,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 13:59:01,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 13:59:01,030 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 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 13:59:01,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:59:01,106 INFO L93 Difference]: Finished difference Result 106 states and 131 transitions. [2023-04-02 13:59:01,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 13:59:01,107 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 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 51 [2023-04-02 13:59:01,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:59:01,107 INFO L225 Difference]: With dead ends: 106 [2023-04-02 13:59:01,108 INFO L226 Difference]: Without dead ends: 67 [2023-04-02 13:59:01,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 13:59:01,109 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:59:01,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:59:01,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-04-02 13:59:01,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2023-04-02 13:59:01,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 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) [2023-04-02 13:59:01,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2023-04-02 13:59:01,117 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 51 [2023-04-02 13:59:01,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:59:01,117 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2023-04-02 13:59:01,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 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 13:59:01,117 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2023-04-02 13:59:01,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-02 13:59:01,118 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:59:01,118 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:59:01,136 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 13:59:01,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:59:01,331 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:59:01,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:59:01,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1858286898, now seen corresponding path program 5 times [2023-04-02 13:59:01,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:59:01,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189185959] [2023-04-02 13:59:01,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:59:01,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:59:01,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:59:01,933 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-02 13:59:01,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:59:01,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189185959] [2023-04-02 13:59:01,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189185959] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:59:01,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926323448] [2023-04-02 13:59:01,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 13:59:01,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:59:01,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:59:01,954 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 13:59:01,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 13:59:02,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 13:59:02,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:59:02,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 13:59:02,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:59:02,292 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2023-04-02 13:59:02,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:59:02,371 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2023-04-02 13:59:02,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926323448] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:59:02,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1084604216] [2023-04-02 13:59:02,373 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 13:59:02,373 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:59:02,373 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:59:02,373 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:59:02,374 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:59:02,385 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:59:02,408 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-02 13:59:02,435 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-02 13:59:03,447 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:59:03,457 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:59:03,459 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:59:04,562 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2597#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a7~0.base_BEFORE_CALL_5| Int) (|v_main_~#a1~0.base_BEFORE_CALL_5| Int)) (and (not (= (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_5|) 0) (select (select |#memory_int| |v_main_~#a7~0.base_BEFORE_CALL_5|) 0))) (<= 2 |v_main_~#a7~0.base_BEFORE_CALL_5|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a7~0.base_BEFORE_CALL_5|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_5|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_5|) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_5|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a7~0.base_BEFORE_CALL_5|)) (<= 4 (+ |v_main_~#a1~0.base_BEFORE_CALL_5| |v_main_~#a7~0.base_BEFORE_CALL_5|)))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:59:04,562 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:59:04,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:59:04,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2023-04-02 13:59:04,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919971851] [2023-04-02 13:59:04,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:59:04,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-02 13:59:04,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:59:04,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-02 13:59:04,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=1665, Unknown=0, NotChecked=0, Total=2070 [2023-04-02 13:59:04,565 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 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 13:59:04,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:59:04,716 INFO L93 Difference]: Finished difference Result 143 states and 193 transitions. [2023-04-02 13:59:04,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-02 13:59:04,716 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 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 63 [2023-04-02 13:59:04,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:59:04,717 INFO L225 Difference]: With dead ends: 143 [2023-04-02 13:59:04,717 INFO L226 Difference]: Without dead ends: 104 [2023-04-02 13:59:04,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=405, Invalid=1665, Unknown=0, NotChecked=0, Total=2070 [2023-04-02 13:59:04,718 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:59:04,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:59:04,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-04-02 13:59:04,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2023-04-02 13:59:04,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 98 states have (on average 1.0816326530612246) internal successors, (106), 98 states have internal predecessors, (106), 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) [2023-04-02 13:59:04,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 111 transitions. [2023-04-02 13:59:04,725 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 111 transitions. Word has length 63 [2023-04-02 13:59:04,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:59:04,725 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 111 transitions. [2023-04-02 13:59:04,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 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 13:59:04,726 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 111 transitions. [2023-04-02 13:59:04,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-02 13:59:04,727 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:59:04,727 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:59:04,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 13:59:04,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:59:04,933 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:59:04,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:59:04,934 INFO L85 PathProgramCache]: Analyzing trace with hash -144217643, now seen corresponding path program 6 times [2023-04-02 13:59:04,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:59:04,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100754868] [2023-04-02 13:59:04,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:59:04,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:59:05,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:59:05,739 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-04-02 13:59:05,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:59:05,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100754868] [2023-04-02 13:59:05,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100754868] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:59:05,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76434753] [2023-04-02 13:59:05,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 13:59:05,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:59:05,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:59:05,743 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:59:05,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 13:59:06,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 13:59:06,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:59:06,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-02 13:59:06,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:59:06,075 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-04-02 13:59:06,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:59:06,708 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-04-02 13:59:06,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76434753] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:59:06,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1269720687] [2023-04-02 13:59:06,718 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 13:59:06,718 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:59:06,718 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:59:06,718 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:59:06,718 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:59:06,733 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:59:06,763 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-02 13:59:06,803 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-02 13:59:07,838 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:59:07,847 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:59:07,851 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:59:08,930 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3730#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a7~0.base_BEFORE_CALL_6| Int) (|v_main_~#a1~0.base_BEFORE_CALL_6| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#a7~0.base_BEFORE_CALL_6|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a7~0.base_BEFORE_CALL_6|)) (<= 4 (+ |v_main_~#a1~0.base_BEFORE_CALL_6| |v_main_~#a7~0.base_BEFORE_CALL_6|)) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_6|) (<= 2 |v_main_~#a7~0.base_BEFORE_CALL_6|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_6|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_6|) (not (= (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_6|) 0) (select (select |#memory_int| |v_main_~#a7~0.base_BEFORE_CALL_6|) 0))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:59:08,930 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:59:08,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:59:08,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-04-02 13:59:08,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136126724] [2023-04-02 13:59:08,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:59:08,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-04-02 13:59:08,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:59:08,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-04-02 13:59:08,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1315, Invalid=2467, Unknown=0, NotChecked=0, Total=3782 [2023-04-02 13:59:08,948 INFO L87 Difference]: Start difference. First operand 104 states and 111 transitions. Second operand has 51 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 51 states have internal predecessors, (69), 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 13:59:09,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:59:09,029 INFO L93 Difference]: Finished difference Result 204 states and 242 transitions. [2023-04-02 13:59:09,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-04-02 13:59:09,030 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 51 states have internal predecessors, (69), 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 100 [2023-04-02 13:59:09,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:59:09,030 INFO L225 Difference]: With dead ends: 204 [2023-04-02 13:59:09,030 INFO L226 Difference]: Without dead ends: 129 [2023-04-02 13:59:09,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1315, Invalid=2467, Unknown=0, NotChecked=0, Total=3782 [2023-04-02 13:59:09,032 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:59:09,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:59:09,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-04-02 13:59:09,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-04-02 13:59:09,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 123 states have (on average 1.065040650406504) internal successors, (131), 123 states have internal predecessors, (131), 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) [2023-04-02 13:59:09,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 136 transitions. [2023-04-02 13:59:09,038 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 136 transitions. Word has length 100 [2023-04-02 13:59:09,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:59:09,039 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 136 transitions. [2023-04-02 13:59:09,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 51 states have internal predecessors, (69), 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 13:59:09,039 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 136 transitions. [2023-04-02 13:59:09,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-02 13:59:09,040 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:59:09,040 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:59:09,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-02 13:59:09,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:59:09,247 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:59:09,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:59:09,247 INFO L85 PathProgramCache]: Analyzing trace with hash 310338638, now seen corresponding path program 7 times [2023-04-02 13:59:09,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:59:09,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408897792] [2023-04-02 13:59:09,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:59:09,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:59:09,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:59:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1506 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-04-02 13:59:11,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:59:11,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408897792] [2023-04-02 13:59:11,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408897792] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:59:11,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403043490] [2023-04-02 13:59:11,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 13:59:11,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:59:11,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:59:11,228 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:59:11,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 13:59:11,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:59:11,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 1425 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-02 13:59:11,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:59:11,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1506 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-04-02 13:59:11,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:59:13,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1506 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-04-02 13:59:13,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403043490] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:59:13,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [159721547] [2023-04-02 13:59:13,988 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 13:59:13,989 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:59:13,989 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:59:13,989 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:59:13,989 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:59:13,999 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:59:14,022 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-02 13:59:14,052 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-02 13:59:15,172 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:59:15,181 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:59:15,183 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:59:16,286 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5235#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a7~0.base_BEFORE_CALL_7| Int) (|v_main_~#a1~0.base_BEFORE_CALL_7| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#a7~0.base_BEFORE_CALL_7|) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_7|) (<= 2 |v_main_~#a7~0.base_BEFORE_CALL_7|) (not (= (select (select |#memory_int| |v_main_~#a7~0.base_BEFORE_CALL_7|) 0) (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_7|) 0))) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_7|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a7~0.base_BEFORE_CALL_7|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_7|)) (<= 4 (+ |v_main_~#a1~0.base_BEFORE_CALL_7| |v_main_~#a7~0.base_BEFORE_CALL_7|)))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:59:16,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:59:16,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:59:16,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2023-04-02 13:59:16,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970265247] [2023-04-02 13:59:16,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:59:16,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-04-02 13:59:16,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:59:16,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-04-02 13:59:16,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5090, Invalid=7342, Unknown=0, NotChecked=0, Total=12432 [2023-04-02 13:59:16,307 INFO L87 Difference]: Start difference. First operand 129 states and 136 transitions. Second operand has 101 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 101 states have internal predecessors, (119), 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 13:59:16,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:59:16,484 INFO L93 Difference]: Finished difference Result 254 states and 317 transitions. [2023-04-02 13:59:16,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-04-02 13:59:16,484 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 101 states have internal predecessors, (119), 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 125 [2023-04-02 13:59:16,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:59:16,486 INFO L225 Difference]: With dead ends: 254 [2023-04-02 13:59:16,486 INFO L226 Difference]: Without dead ends: 179 [2023-04-02 13:59:16,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1822 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5090, Invalid=7342, Unknown=0, NotChecked=0, Total=12432 [2023-04-02 13:59:16,489 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:59:16,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 111 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:59:16,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-04-02 13:59:16,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2023-04-02 13:59:16,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 173 states have (on average 1.046242774566474) internal successors, (181), 173 states have internal predecessors, (181), 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) [2023-04-02 13:59:16,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 186 transitions. [2023-04-02 13:59:16,498 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 186 transitions. Word has length 125 [2023-04-02 13:59:16,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:59:16,499 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 186 transitions. [2023-04-02 13:59:16,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 101 states have internal predecessors, (119), 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 13:59:16,499 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 186 transitions. [2023-04-02 13:59:16,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-04-02 13:59:16,517 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:59:16,517 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:59:16,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-02 13:59:16,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:59:16,723 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:59:16,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:59:16,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1185710546, now seen corresponding path program 8 times [2023-04-02 13:59:16,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:59:16,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162010793] [2023-04-02 13:59:16,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:59:16,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:59:16,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:59:21,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5181 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-04-02 13:59:21,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:59:21,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162010793] [2023-04-02 13:59:21,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162010793] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:59:21,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186287529] [2023-04-02 13:59:21,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 13:59:21,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:59:21,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:59:21,996 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:59:21,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 13:59:31,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-02 13:59:31,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:59:31,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 13:59:31,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:59:31,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5181 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5126 trivial. 0 not checked. [2023-04-02 13:59:31,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:59:32,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5181 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5126 trivial. 0 not checked. [2023-04-02 13:59:32,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186287529] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:59:32,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [117973812] [2023-04-02 13:59:32,275 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 13:59:32,275 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:59:32,276 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:59:32,276 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:59:32,276 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:59:32,289 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:59:32,322 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-02 13:59:32,348 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-02 13:59:33,435 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:59:33,444 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:59:33,446 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:59:35,164 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7262#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a7~0.base_BEFORE_CALL_8| Int) (|v_main_~#a1~0.base_BEFORE_CALL_8| Int)) (and (<= 2 |v_main_~#a7~0.base_BEFORE_CALL_8|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_8|)) (<= 4 (+ |v_main_~#a1~0.base_BEFORE_CALL_8| |v_main_~#a7~0.base_BEFORE_CALL_8|)) (not (= (select (select |#memory_int| |v_main_~#a7~0.base_BEFORE_CALL_8|) 0) (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_8|) 0))) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_8|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a7~0.base_BEFORE_CALL_8|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a7~0.base_BEFORE_CALL_8|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_8|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:59:35,164 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:59:35,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:59:35,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 13, 13] total 123 [2023-04-02 13:59:35,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004627247] [2023-04-02 13:59:35,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:59:35,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2023-04-02 13:59:35,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:59:35,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2023-04-02 13:59:35,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5365, Invalid=12457, Unknown=0, NotChecked=0, Total=17822 [2023-04-02 13:59:35,170 INFO L87 Difference]: Start difference. First operand 179 states and 186 transitions. Second operand has 123 states, 123 states have (on average 1.1951219512195121) internal successors, (147), 123 states have internal predecessors, (147), 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 13:59:35,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:59:35,518 INFO L93 Difference]: Finished difference Result 327 states and 413 transitions. [2023-04-02 13:59:35,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2023-04-02 13:59:35,518 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.1951219512195121) internal successors, (147), 123 states have internal predecessors, (147), 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 175 [2023-04-02 13:59:35,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:59:35,519 INFO L225 Difference]: With dead ends: 327 [2023-04-02 13:59:35,519 INFO L226 Difference]: Without dead ends: 252 [2023-04-02 13:59:35,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3588 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5365, Invalid=12457, Unknown=0, NotChecked=0, Total=17822 [2023-04-02 13:59:35,523 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 13:59:35,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 93 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 13:59:35,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-04-02 13:59:35,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2023-04-02 13:59:35,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 246 states have (on average 1.032520325203252) internal successors, (254), 246 states have internal predecessors, (254), 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) [2023-04-02 13:59:35,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 259 transitions. [2023-04-02 13:59:35,533 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 259 transitions. Word has length 175 [2023-04-02 13:59:35,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:59:35,533 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 259 transitions. [2023-04-02 13:59:35,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.1951219512195121) internal successors, (147), 123 states have internal predecessors, (147), 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 13:59:35,534 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 259 transitions. [2023-04-02 13:59:35,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2023-04-02 13:59:35,536 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:59:35,536 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:59:35,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 13:59:35,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 13:59:35,736 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:59:35,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:59:35,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1542083115, now seen corresponding path program 9 times [2023-04-02 13:59:35,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:59:35,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961637334] [2023-04-02 13:59:35,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:59:35,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:59:35,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:59:42,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6468 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2023-04-02 13:59:42,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:59:42,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961637334] [2023-04-02 13:59:42,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961637334] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:59:42,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349747660] [2023-04-02 13:59:42,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 13:59:42,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:59:42,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:59:42,059 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:59:42,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 13:59:42,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 13:59:42,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:59:42,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 2796 conjuncts, 101 conjunts are in the unsatisfiable core [2023-04-02 13:59:42,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:59:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6468 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2023-04-02 13:59:42,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:59:50,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6468 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2023-04-02 13:59:50,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349747660] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:59:50,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [791520095] [2023-04-02 13:59:50,031 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 13:59:50,031 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:59:50,032 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:59:50,032 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:59:50,032 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:59:50,042 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:59:50,082 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-02 13:59:50,109 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-02 13:59:51,173 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:59:51,182 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:59:51,184 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:59:52,855 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10099#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a7~0.base_BEFORE_CALL_9| Int) (|v_main_~#a1~0.base_BEFORE_CALL_9| Int)) (and (<= 3 (+ |#StackHeapBarrier| |v_main_~#a1~0.base_BEFORE_CALL_9|)) (not (= (select (select |#memory_int| |v_main_~#a7~0.base_BEFORE_CALL_9|) 0) (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_9|) 0))) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_9|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a7~0.base_BEFORE_CALL_9|) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_9|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a7~0.base_BEFORE_CALL_9|)) (<= 4 (+ |v_main_~#a1~0.base_BEFORE_CALL_9| |v_main_~#a7~0.base_BEFORE_CALL_9|)) (<= 2 |v_main_~#a7~0.base_BEFORE_CALL_9|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:59:52,856 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:59:52,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:59:52,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2023-04-02 13:59:52,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163210748] [2023-04-02 13:59:52,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:59:52,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-04-02 13:59:52,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:59:52,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-04-02 13:59:52,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20543, Invalid=25039, Unknown=0, NotChecked=0, Total=45582 [2023-04-02 13:59:52,878 INFO L87 Difference]: Start difference. First operand 252 states and 259 transitions. Second operand has 203 states, 203 states have (on average 1.0886699507389161) internal successors, (221), 203 states have internal predecessors, (221), 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 13:59:53,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:59:53,252 INFO L93 Difference]: Finished difference Result 500 states and 614 transitions. [2023-04-02 13:59:53,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-04-02 13:59:53,252 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0886699507389161) internal successors, (221), 203 states have internal predecessors, (221), 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 248 [2023-04-02 13:59:53,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:59:53,254 INFO L225 Difference]: With dead ends: 500 [2023-04-02 13:59:53,254 INFO L226 Difference]: Without dead ends: 353 [2023-04-02 13:59:53,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 633 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3709 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=20543, Invalid=25039, Unknown=0, NotChecked=0, Total=45582 [2023-04-02 13:59:53,259 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 13:59:53,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 122 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 13:59:53,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2023-04-02 13:59:53,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2023-04-02 13:59:53,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 347 states have (on average 1.0230547550432276) internal successors, (355), 347 states have internal predecessors, (355), 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) [2023-04-02 13:59:53,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 360 transitions. [2023-04-02 13:59:53,279 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 360 transitions. Word has length 248 [2023-04-02 13:59:53,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:59:53,280 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 360 transitions. [2023-04-02 13:59:53,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0886699507389161) internal successors, (221), 203 states have internal predecessors, (221), 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 13:59:53,281 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 360 transitions. [2023-04-02 13:59:53,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2023-04-02 13:59:53,289 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:59:53,290 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:59:53,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 13:59:53,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:59:53,506 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:59:53,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:59:53,506 INFO L85 PathProgramCache]: Analyzing trace with hash -657263858, now seen corresponding path program 10 times [2023-04-02 13:59:53,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:59:53,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625352646] [2023-04-02 13:59:53,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:59:53,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:59:53,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:00:18,653 INFO L134 CoverageAnalysis]: Checked inductivity of 21618 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2023-04-02 14:00:18,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:00:18,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625352646] [2023-04-02 14:00:18,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625352646] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:00:18,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586078310] [2023-04-02 14:00:18,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:00:18,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:00:18,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:00:18,655 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:00:18,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 14:00:19,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:00:19,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 4513 conjuncts, 202 conjunts are in the unsatisfiable core [2023-04-02 14:00:19,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:00:20,070 INFO L134 CoverageAnalysis]: Checked inductivity of 21618 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2023-04-02 14:00:20,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:00:49,732 INFO L134 CoverageAnalysis]: Checked inductivity of 21618 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2023-04-02 14:00:49,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586078310] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:00:49,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1052346918] [2023-04-02 14:00:49,734 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 14:00:49,734 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:00:49,735 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:00:49,735 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:00:49,735 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:00:49,757 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:00:49,779 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-02 14:00:49,804 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-02 14:00:50,894 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 14:00:50,903 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:00:50,905 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:00:53,629 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14292#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a7~0.base_BEFORE_CALL_10| Int) (|v_main_~#a1~0.base_BEFORE_CALL_10| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#a7~0.base_BEFORE_CALL_10|) (<= 2 |v_main_~#a7~0.base_BEFORE_CALL_10|) (<= 2 |v_main_~#a1~0.base_BEFORE_CALL_10|) (<= 3 (+ |v_main_~#a1~0.base_BEFORE_CALL_10| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a1~0.base_BEFORE_CALL_10|) (<= 4 (+ |v_main_~#a1~0.base_BEFORE_CALL_10| |v_main_~#a7~0.base_BEFORE_CALL_10|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a7~0.base_BEFORE_CALL_10|)) (not (= (select (select |#memory_int| |v_main_~#a1~0.base_BEFORE_CALL_10|) 0) (select (select |#memory_int| |v_main_~#a7~0.base_BEFORE_CALL_10|) 0))))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:00:53,629 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:00:53,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:00:53,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [203, 203, 203] total 405 [2023-04-02 14:00:53,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781557543] [2023-04-02 14:00:53,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:00:53,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2023-04-02 14:00:53,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:00:53,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2023-04-02 14:00:53,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81850, Invalid=90790, Unknown=0, NotChecked=0, Total=172640 [2023-04-02 14:00:53,647 INFO L87 Difference]: Start difference. First operand 353 states and 360 transitions. Second operand has 405 states, 405 states have (on average 1.0444444444444445) internal successors, (423), 405 states have internal predecessors, (423), 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 14:00:55,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:00:55,195 INFO L93 Difference]: Finished difference Result 702 states and 917 transitions. [2023-04-02 14:00:55,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2023-04-02 14:00:55,195 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.0444444444444445) internal successors, (423), 405 states have internal predecessors, (423), 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 349 [2023-04-02 14:00:55,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:00:55,203 INFO L225 Difference]: With dead ends: 702 [2023-04-02 14:00:55,204 INFO L226 Difference]: Without dead ends: 555 [2023-04-02 14:00:55,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1249 GetRequests, 835 SyntacticMatches, 0 SemanticMatches, 414 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7446 ImplicationChecksByTransitivity, 44.0s TimeCoverageRelationStatistics Valid=81850, Invalid=90790, Unknown=0, NotChecked=0, Total=172640 [2023-04-02 14:00:55,224 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 14:00:55,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 14:00:55,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2023-04-02 14:00:55,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 555. [2023-04-02 14:00:55,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 549 states have (on average 1.0145719489981786) internal successors, (557), 549 states have internal predecessors, (557), 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) [2023-04-02 14:00:55,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 562 transitions. [2023-04-02 14:00:55,238 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 562 transitions. Word has length 349 [2023-04-02 14:00:55,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:00:55,238 INFO L495 AbstractCegarLoop]: Abstraction has 555 states and 562 transitions. [2023-04-02 14:00:55,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.0444444444444445) internal successors, (423), 405 states have internal predecessors, (423), 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 14:00:55,239 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 562 transitions. [2023-04-02 14:00:55,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2023-04-02 14:00:55,244 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:00:55,245 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:00:55,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 14:00:55,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 14:00:55,458 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:00:55,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:00:55,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1979510638, now seen corresponding path program 11 times [2023-04-02 14:00:55,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:00:55,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914884309] [2023-04-02 14:00:55,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:00:55,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:00:56,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:02:29,224 INFO L134 CoverageAnalysis]: Checked inductivity of 82521 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2023-04-02 14:02:29,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:02:29,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914884309] [2023-04-02 14:02:29,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914884309] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:02:29,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973527799] [2023-04-02 14:02:29,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:02:29,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:02:29,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:02:29,228 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:02:29,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process