/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-industry-pattern/array_of_struct_loop_dep.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 14:20:36,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 14:20:36,319 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 14:20:36,352 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 14:20:36,352 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 14:20:36,354 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 14:20:36,356 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 14:20:36,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 14:20:36,359 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 14:20:36,363 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 14:20:36,364 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 14:20:36,365 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 14:20:36,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 14:20:36,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 14:20:36,368 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 14:20:36,369 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 14:20:36,369 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 14:20:36,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 14:20:36,371 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 14:20:36,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 14:20:36,375 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 14:20:36,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 14:20:36,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 14:20:36,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 14:20:36,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 14:20:36,384 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 14:20:36,384 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 14:20:36,385 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 14:20:36,385 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 14:20:36,386 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 14:20:36,386 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 14:20:36,386 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 14:20:36,387 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 14:20:36,388 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 14:20:36,388 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 14:20:36,388 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 14:20:36,389 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 14:20:36,389 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 14:20:36,389 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 14:20:36,389 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 14:20:36,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 14:20:36,391 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 14:20:36,413 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 14:20:36,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 14:20:36,414 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 14:20:36,414 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 14:20:36,414 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 14:20:36,415 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 14:20:36,415 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 14:20:36,415 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 14:20:36,415 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 14:20:36,415 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 14:20:36,415 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 14:20:36,416 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 14:20:36,416 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 14:20:36,416 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 14:20:36,416 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 14:20:36,416 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 14:20:36,416 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 14:20:36,416 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 14:20:36,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 14:20:36,417 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 14:20:36,417 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 14:20:36,417 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 14:20:36,417 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 14:20:36,417 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 14:20:36,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 14:20:36,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 14:20:36,417 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 14:20:36,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 14:20:36,417 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 14:20:36,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 14:20:36,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 14:20:36,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 14:20:36,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:20:36,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 14:20:36,418 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 14:20:36,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 14:20:36,418 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 14:20:36,418 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 14:20:36,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 14:20:36,419 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 14:20:36,419 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 14:20:36,419 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 14:20:36,591 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 14:20:36,610 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 14:20:36,612 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 14:20:36,613 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 14:20:36,614 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 14:20:36,615 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_of_struct_loop_dep.i [2023-04-02 14:20:37,538 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 14:20:37,709 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 14:20:37,710 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_of_struct_loop_dep.i [2023-04-02 14:20:37,713 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa6483c88/8f11a89973c1455084f23296ac4e4a23/FLAGd9c867823 [2023-04-02 14:20:37,723 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa6483c88/8f11a89973c1455084f23296ac4e4a23 [2023-04-02 14:20:37,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 14:20:37,726 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 14:20:37,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 14:20:37,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 14:20:37,729 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 14:20:37,730 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:20:37" (1/1) ... [2023-04-02 14:20:37,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7129027e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:20:37, skipping insertion in model container [2023-04-02 14:20:37,731 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:20:37" (1/1) ... [2023-04-02 14:20:37,735 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 14:20:37,749 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 14:20:37,847 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-industry-pattern/array_of_struct_loop_dep.i[817,830] [2023-04-02 14:20:37,859 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:20:38,702 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 14:20:38,710 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-industry-pattern/array_of_struct_loop_dep.i[817,830] [2023-04-02 14:20:38,714 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:20:38,725 INFO L208 MainTranslator]: Completed translation [2023-04-02 14:20:38,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:20:38 WrapperNode [2023-04-02 14:20:38,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 14:20:38,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 14:20:38,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 14:20:38,726 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 14:20:38,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:20:38" (1/1) ... [2023-04-02 14:20:38,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:20:38" (1/1) ... [2023-04-02 14:20:38,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:20:38" (1/1) ... [2023-04-02 14:20:38,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:20:38" (1/1) ... [2023-04-02 14:20:38,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:20:38" (1/1) ... [2023-04-02 14:20:38,750 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:20:38" (1/1) ... [2023-04-02 14:20:38,750 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:20:38" (1/1) ... [2023-04-02 14:20:38,751 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:20:38" (1/1) ... [2023-04-02 14:20:38,752 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 14:20:38,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 14:20:38,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 14:20:38,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 14:20:38,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:20:38" (1/1) ... [2023-04-02 14:20:38,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:20:38,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:20:38,775 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 14:20:38,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 14:20:38,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 14:20:38,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 14:20:38,799 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 14:20:38,799 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 14:20:38,799 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 14:20:38,799 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 14:20:38,799 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 14:20:38,800 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 14:20:38,800 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 14:20:38,800 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 14:20:38,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 14:20:38,800 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 14:20:38,800 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 14:20:38,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 14:20:38,800 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 14:20:38,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 14:20:38,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 14:20:38,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 14:20:38,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 14:20:38,869 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 14:20:38,871 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 14:20:39,016 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 14:20:39,038 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 14:20:39,039 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 14:20:39,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:20:39 BoogieIcfgContainer [2023-04-02 14:20:39,040 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 14:20:39,042 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 14:20:39,042 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 14:20:39,044 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 14:20:39,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:20:37" (1/3) ... [2023-04-02 14:20:39,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b98bcd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:20:39, skipping insertion in model container [2023-04-02 14:20:39,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:20:38" (2/3) ... [2023-04-02 14:20:39,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b98bcd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:20:39, skipping insertion in model container [2023-04-02 14:20:39,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:20:39" (3/3) ... [2023-04-02 14:20:39,047 INFO L112 eAbstractionObserver]: Analyzing ICFG array_of_struct_loop_dep.i [2023-04-02 14:20:39,060 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 14:20:39,060 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 14:20:39,105 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 14:20:39,111 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;@232a1655, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 14:20:39,112 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 14:20:39,116 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:20:39,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 14:20:39,122 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:20:39,122 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:20:39,123 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:20:39,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:20:39,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1529679341, now seen corresponding path program 1 times [2023-04-02 14:20:39,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:20:39,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161692754] [2023-04-02 14:20:39,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:20:39,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:20:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:20:39,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:20:39,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:20:39,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161692754] [2023-04-02 14:20:39,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161692754] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:20:39,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:20:39,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 14:20:39,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736060277] [2023-04-02 14:20:39,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:20:39,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 14:20:39,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:20:39,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 14:20:39,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:20:39,336 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 14:20:39,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:20:39,371 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2023-04-02 14:20:39,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 14:20:39,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2023-04-02 14:20:39,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:20:39,378 INFO L225 Difference]: With dead ends: 34 [2023-04-02 14:20:39,378 INFO L226 Difference]: Without dead ends: 19 [2023-04-02 14:20:39,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:20:39,384 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:20:39,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 25 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:20:39,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-04-02 14:20:39,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2023-04-02 14:20:39,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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 14:20:39,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-04-02 14:20:39,408 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2023-04-02 14:20:39,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:20:39,408 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-04-02 14:20:39,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 14:20:39,409 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-04-02 14:20:39,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-02 14:20:39,409 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:20:39,409 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:20:39,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 14:20:39,409 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:20:39,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:20:39,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1341600878, now seen corresponding path program 1 times [2023-04-02 14:20:39,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:20:39,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194489465] [2023-04-02 14:20:39,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:20:39,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:20:39,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:20:39,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:20:39,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:20:39,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194489465] [2023-04-02 14:20:39,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194489465] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:20:39,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447595533] [2023-04-02 14:20:39,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:20:39,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:20:39,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:20:39,499 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:20:39,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 14:20:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:20:39,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 14:20:39,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:20:39,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:20:39,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:20:39,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:20:39,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447595533] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:20:39,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [587539008] [2023-04-02 14:20:39,614 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-02 14:20:39,614 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:20:39,617 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:20:39,620 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:20:39,620 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:20:39,715 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-02 14:20:39,790 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-02 14:20:39,805 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-02 14:20:39,819 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:20:40,026 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '173#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= (select (select |#memory_int| 3) 0) 10)) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:20:40,029 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:20:40,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:20:40,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 14:20:40,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595835241] [2023-04-02 14:20:40,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:20:40,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 14:20:40,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:20:40,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 14:20:40,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2023-04-02 14:20:40,034 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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 14:20:40,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:20:40,075 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2023-04-02 14:20:40,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 14:20:40,075 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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 12 [2023-04-02 14:20:40,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:20:40,076 INFO L225 Difference]: With dead ends: 38 [2023-04-02 14:20:40,076 INFO L226 Difference]: Without dead ends: 29 [2023-04-02 14:20:40,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2023-04-02 14:20:40,078 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:20:40,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 38 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:20:40,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-02 14:20:40,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2023-04-02 14:20:40,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:20:40,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2023-04-02 14:20:40,086 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 12 [2023-04-02 14:20:40,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:20:40,086 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2023-04-02 14:20:40,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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 14:20:40,087 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2023-04-02 14:20:40,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 14:20:40,087 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:20:40,088 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:20:40,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 14:20:40,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:20:40,295 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:20:40,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:20:40,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1828597971, now seen corresponding path program 2 times [2023-04-02 14:20:40,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:20:40,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160328853] [2023-04-02 14:20:40,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:20:40,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:20:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:20:40,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:20:40,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:20:40,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160328853] [2023-04-02 14:20:40,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160328853] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:20:40,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515313163] [2023-04-02 14:20:40,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:20:40,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:20:40,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:20:40,441 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:20:40,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 14:20:40,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 14:20:40,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:20:40,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 14:20:40,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:20:40,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:20:40,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:20:40,568 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:20:40,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515313163] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:20:40,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [662887121] [2023-04-02 14:20:40,573 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-02 14:20:40,574 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:20:40,574 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:20:40,575 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:20:40,575 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:20:40,621 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-02 14:20:40,656 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-02 14:20:40,664 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-02 14:20:40,671 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:20:40,865 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '374#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= (select (select |#memory_int| 3) 0) 10)) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:20:40,865 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:20:40,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:20:40,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-02 14:20:40,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474850346] [2023-04-02 14:20:40,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:20:40,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 14:20:40,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:20:40,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 14:20:40,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2023-04-02 14:20:40,867 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 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 14:20:40,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:20:40,941 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2023-04-02 14:20:40,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 14:20:40,941 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-04-02 14:20:40,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:20:40,943 INFO L225 Difference]: With dead ends: 62 [2023-04-02 14:20:40,943 INFO L226 Difference]: Without dead ends: 53 [2023-04-02 14:20:40,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2023-04-02 14:20:40,947 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:20:40,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 47 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:20:40,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-04-02 14:20:40,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 25. [2023-04-02 14:20:40,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 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 14:20:40,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-04-02 14:20:40,957 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 15 [2023-04-02 14:20:40,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:20:40,957 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-04-02 14:20:40,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 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 14:20:40,957 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-04-02 14:20:40,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 14:20:40,958 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:20:40,958 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:20:40,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 14:20:41,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-02 14:20:41,165 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:20:41,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:20:41,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1633486093, now seen corresponding path program 3 times [2023-04-02 14:20:41,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:20:41,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006278668] [2023-04-02 14:20:41,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:20:41,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:20:41,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:20:41,358 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:20:41,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:20:41,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006278668] [2023-04-02 14:20:41,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006278668] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:20:41,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091409907] [2023-04-02 14:20:41,358 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:20:41,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:20:41,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:20:41,374 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:20:41,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 14:20:41,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:20:41,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:20:41,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 14:20:41,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:20:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:20:41,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:20:41,580 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:20:41,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091409907] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:20:41,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [13539132] [2023-04-02 14:20:41,582 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-02 14:20:41,582 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:20:41,582 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:20:41,582 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:20:41,582 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:20:41,610 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-02 14:20:41,630 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-02 14:20:41,636 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-02 14:20:41,644 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:20:41,833 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '677#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= (select (select |#memory_int| 3) 0) 10)) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:20:41,834 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:20:41,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:20:41,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-02 14:20:41,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396424370] [2023-04-02 14:20:41,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:20:41,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 14:20:41,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:20:41,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 14:20:41,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=810, Unknown=0, NotChecked=0, Total=1190 [2023-04-02 14:20:41,836 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 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 14:20:41,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:20:41,995 INFO L93 Difference]: Finished difference Result 110 states and 144 transitions. [2023-04-02 14:20:41,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 14:20:41,995 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 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 21 [2023-04-02 14:20:41,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:20:41,997 INFO L225 Difference]: With dead ends: 110 [2023-04-02 14:20:41,997 INFO L226 Difference]: Without dead ends: 101 [2023-04-02 14:20:41,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=810, Unknown=0, NotChecked=0, Total=1190 [2023-04-02 14:20:41,998 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:20:41,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 56 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:20:41,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-04-02 14:20:42,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 37. [2023-04-02 14:20:42,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 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 14:20:42,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2023-04-02 14:20:42,006 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 21 [2023-04-02 14:20:42,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:20:42,006 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2023-04-02 14:20:42,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 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 14:20:42,006 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2023-04-02 14:20:42,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-02 14:20:42,007 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:20:42,007 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:20:42,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-02 14:20:42,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:20:42,212 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:20:42,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:20:42,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1542866739, now seen corresponding path program 4 times [2023-04-02 14:20:42,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:20:42,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251539896] [2023-04-02 14:20:42,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:20:42,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:20:42,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:20:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:20:42,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:20:42,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251539896] [2023-04-02 14:20:42,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251539896] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:20:42,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133920511] [2023-04-02 14:20:42,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:20:42,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:20:42,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:20:42,576 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:20:42,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 14:20:42,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:20:42,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-02 14:20:42,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:20:42,680 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:20:42,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:20:43,230 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:20:43,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133920511] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:20:43,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1759778014] [2023-04-02 14:20:43,232 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-02 14:20:43,232 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:20:43,232 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:20:43,233 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:20:43,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:20:43,265 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-02 14:20:43,289 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-02 14:20:43,297 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-02 14:20:43,304 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:20:43,538 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1184#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= (select (select |#memory_int| 3) 0) 10)) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:20:43,538 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:20:43,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:20:43,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-04-02 14:20:43,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057137185] [2023-04-02 14:20:43,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:20:43,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-02 14:20:43,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:20:43,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-02 14:20:43,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1304, Invalid=2118, Unknown=0, NotChecked=0, Total=3422 [2023-04-02 14:20:43,541 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 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 14:20:43,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:20:43,946 INFO L93 Difference]: Finished difference Result 206 states and 276 transitions. [2023-04-02 14:20:43,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-02 14:20:43,947 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 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 33 [2023-04-02 14:20:43,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:20:43,948 INFO L225 Difference]: With dead ends: 206 [2023-04-02 14:20:43,948 INFO L226 Difference]: Without dead ends: 197 [2023-04-02 14:20:43,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1304, Invalid=2118, Unknown=0, NotChecked=0, Total=3422 [2023-04-02 14:20:43,949 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 149 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 14:20:43,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 56 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 14:20:43,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-04-02 14:20:43,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 61. [2023-04-02 14:20:43,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 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 14:20:43,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2023-04-02 14:20:43,959 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 33 [2023-04-02 14:20:43,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:20:43,959 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2023-04-02 14:20:43,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 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 14:20:43,960 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2023-04-02 14:20:43,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-02 14:20:43,960 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:20:43,960 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:20:43,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 14:20:44,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:20:44,165 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:20:44,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:20:44,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1388036019, now seen corresponding path program 5 times [2023-04-02 14:20:44,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:20:44,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343519813] [2023-04-02 14:20:44,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:20:44,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:20:44,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:20:45,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:20:45,461 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:20:45,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343519813] [2023-04-02 14:20:45,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343519813] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:20:45,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278648903] [2023-04-02 14:20:45,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:20:45,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:20:45,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:20:45,463 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:20:45,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 14:21:35,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-04-02 14:21:35,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:21:35,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-02 14:21:35,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:21:35,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:21:35,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:21:37,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:21:37,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278648903] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:21:37,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [434959952] [2023-04-02 14:21:37,993 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-02 14:21:37,993 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:21:37,994 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:21:37,994 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:21:37,994 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:21:38,031 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-02 14:21:38,044 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-02 14:21:38,050 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-02 14:21:38,058 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:21:38,361 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2099#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= (select (select |#memory_int| 3) 0) 10)) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:21:38,361 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:21:38,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:21:38,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2023-04-02 14:21:38,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107556581] [2023-04-02 14:21:38,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:21:38,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-04-02 14:21:38,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:21:38,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-04-02 14:21:38,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4880, Invalid=6462, Unknown=0, NotChecked=0, Total=11342 [2023-04-02 14:21:38,367 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 97 states have internal predecessors, (103), 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 14:21:39,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:21:39,889 INFO L93 Difference]: Finished difference Result 398 states and 540 transitions. [2023-04-02 14:21:39,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-04-02 14:21:39,890 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 97 states have internal predecessors, (103), 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 57 [2023-04-02 14:21:39,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:21:39,891 INFO L225 Difference]: With dead ends: 398 [2023-04-02 14:21:39,892 INFO L226 Difference]: Without dead ends: 389 [2023-04-02 14:21:39,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1698 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4880, Invalid=6462, Unknown=0, NotChecked=0, Total=11342 [2023-04-02 14:21:39,894 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 443 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 794 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 794 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 14:21:39,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 29 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [794 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 14:21:39,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2023-04-02 14:21:39,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 109. [2023-04-02 14:21:39,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 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 14:21:39,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2023-04-02 14:21:39,910 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 57 [2023-04-02 14:21:39,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:21:39,910 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2023-04-02 14:21:39,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 97 states have internal predecessors, (103), 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 14:21:39,911 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2023-04-02 14:21:39,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-04-02 14:21:39,911 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:21:39,912 INFO L195 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:21:39,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 14:21:40,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:21:40,129 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:21:40,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:21:40,130 INFO L85 PathProgramCache]: Analyzing trace with hash -75641011, now seen corresponding path program 6 times [2023-04-02 14:21:40,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:21:40,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18349635] [2023-04-02 14:21:40,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:21:40,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:21:40,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:21:44,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:21:44,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:21:44,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18349635] [2023-04-02 14:21:44,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18349635] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:21:44,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364758256] [2023-04-02 14:21:44,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:21:44,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:21:44,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:21:44,106 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:21:44,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 14:21:44,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:21:44,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:21:44,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 96 conjunts are in the unsatisfiable core [2023-04-02 14:21:44,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:21:44,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:21:44,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:21:51,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:21:51,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364758256] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:21:51,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1437489422] [2023-04-02 14:21:51,677 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-02 14:21:51,678 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:21:51,678 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:21:51,678 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:21:51,678 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:21:51,702 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-02 14:21:51,717 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-02 14:21:51,722 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-02 14:21:51,726 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:21:52,202 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3830#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= (select (select |#memory_int| 3) 0) 10)) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:21:52,203 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:21:52,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:21:52,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2023-04-02 14:21:52,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959435623] [2023-04-02 14:21:52,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:21:52,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2023-04-02 14:21:52,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:21:52,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2023-04-02 14:21:52,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18944, Invalid=22062, Unknown=0, NotChecked=0, Total=41006 [2023-04-02 14:21:52,214 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 193 states, 193 states have (on average 1.0310880829015545) internal successors, (199), 193 states have internal predecessors, (199), 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 14:22:04,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:22:04,278 INFO L93 Difference]: Finished difference Result 782 states and 1068 transitions. [2023-04-02 14:22:04,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2023-04-02 14:22:04,279 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0310880829015545) internal successors, (199), 193 states have internal predecessors, (199), 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 105 [2023-04-02 14:22:04,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:22:04,284 INFO L225 Difference]: With dead ends: 782 [2023-04-02 14:22:04,284 INFO L226 Difference]: Without dead ends: 773 [2023-04-02 14:22:04,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3426 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=18944, Invalid=22062, Unknown=0, NotChecked=0, Total=41006 [2023-04-02 14:22:04,287 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 884 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 1580 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1074 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 2349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1580 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 14:22:04,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1074 Valid, 65 Invalid, 2349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1580 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-02 14:22:04,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2023-04-02 14:22:04,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 205. [2023-04-02 14:22:04,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 199 states have (on average 1.0100502512562815) internal successors, (201), 199 states have internal predecessors, (201), 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 14:22:04,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2023-04-02 14:22:04,328 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 105 [2023-04-02 14:22:04,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:22:04,329 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2023-04-02 14:22:04,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0310880829015545) internal successors, (199), 193 states have internal predecessors, (199), 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 14:22:04,329 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2023-04-02 14:22:04,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-04-02 14:22:04,330 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:22:04,331 INFO L195 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:22:04,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 14:22:04,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:22:04,541 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:22:04,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:22:04,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1459425971, now seen corresponding path program 7 times [2023-04-02 14:22:04,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:22:04,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043039289] [2023-04-02 14:22:04,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:22:04,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:22:04,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:22:18,489 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:22:18,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:22:18,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043039289] [2023-04-02 14:22:18,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043039289] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:22:18,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407872820] [2023-04-02 14:22:18,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:22:18,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:22:18,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:22:18,491 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:22:18,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 14:22:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:22:18,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 1401 conjuncts, 192 conjunts are in the unsatisfiable core [2023-04-02 14:22:18,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:22:19,012 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:22:19,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:22:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:22:48,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407872820] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:22:48,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2032987638] [2023-04-02 14:22:48,594 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-02 14:22:48,594 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:22:48,594 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:22:48,594 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:22:48,594 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:22:48,637 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-02 14:22:48,653 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-02 14:22:48,660 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-02 14:22:48,664 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:22:49,446 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7193#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= (select (select |#memory_int| 3) 0) 10)) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:22:49,446 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:22:49,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:22:49,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 385 [2023-04-02 14:22:49,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818635269] [2023-04-02 14:22:49,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:22:49,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2023-04-02 14:22:49,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:22:49,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2023-04-02 14:22:49,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74720, Invalid=80910, Unknown=0, NotChecked=0, Total=155630 [2023-04-02 14:22:49,465 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand has 385 states, 385 states have (on average 1.0155844155844156) internal successors, (391), 385 states have internal predecessors, (391), 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)