/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-crafted/xor4.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 02:51:50,716 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 02:51:50,717 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 02:51:50,751 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 02:51:50,752 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 02:51:50,753 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 02:51:50,755 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 02:51:50,757 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 02:51:50,758 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 02:51:50,762 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 02:51:50,763 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 02:51:50,764 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 02:51:50,764 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 02:51:50,766 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 02:51:50,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 02:51:50,768 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 02:51:50,768 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 02:51:50,769 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 02:51:50,770 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 02:51:50,775 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 02:51:50,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 02:51:50,776 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 02:51:50,777 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 02:51:50,777 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 02:51:50,783 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 02:51:50,783 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 02:51:50,783 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 02:51:50,784 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 02:51:50,784 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 02:51:50,785 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 02:51:50,785 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 02:51:50,785 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 02:51:50,786 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 02:51:50,786 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 02:51:50,786 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 02:51:50,787 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 02:51:50,787 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 02:51:50,787 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 02:51:50,787 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 02:51:50,788 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 02:51:50,788 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 02:51:50,791 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 02:51:50,813 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 02:51:50,813 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 02:51:50,814 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 02:51:50,814 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 02:51:50,814 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 02:51:50,815 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 02:51:50,815 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 02:51:50,815 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 02:51:50,815 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 02:51:50,815 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 02:51:50,815 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 02:51:50,816 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 02:51:50,816 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 02:51:50,816 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 02:51:50,816 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 02:51:50,816 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 02:51:50,816 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 02:51:50,816 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 02:51:50,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 02:51:50,816 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 02:51:50,817 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 02:51:50,817 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 02:51:50,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 02:51:50,817 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 02:51:50,817 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 02:51:50,817 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 02:51:50,817 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 02:51:50,817 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 02:51:50,817 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 02:51:50,818 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 02:51:50,818 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 02:51:50,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 02:51:50,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:51:50,818 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 02:51:50,818 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 02:51:50,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 02:51:50,818 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 02:51:50,818 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 02:51:50,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 02:51:50,818 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 02:51:50,819 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 02:51:50,819 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 02:51:50,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 02:51:51,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 02:51:51,004 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 02:51:51,005 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 02:51:51,006 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 02:51:51,006 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/xor4.i [2023-04-01 02:51:51,928 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 02:51:52,158 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 02:51:52,158 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor4.i [2023-04-01 02:51:52,163 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc2d8cb6c/f2cb46a26f014d4da4e4d56609b8b7fe/FLAG2af95505e [2023-04-01 02:51:52,571 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc2d8cb6c/f2cb46a26f014d4da4e4d56609b8b7fe [2023-04-01 02:51:52,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 02:51:52,575 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 02:51:52,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 02:51:52,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 02:51:52,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 02:51:52,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:51:52" (1/1) ... [2023-04-01 02:51:52,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b13186d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:51:52, skipping insertion in model container [2023-04-01 02:51:52,581 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:51:52" (1/1) ... [2023-04-01 02:51:52,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 02:51:52,596 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 02:51:52,686 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-crafted/xor4.i[1303,1316] [2023-04-01 02:51:52,688 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:51:52,694 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 02:51:52,706 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-crafted/xor4.i[1303,1316] [2023-04-01 02:51:52,707 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:51:52,715 INFO L208 MainTranslator]: Completed translation [2023-04-01 02:51:52,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:51:52 WrapperNode [2023-04-01 02:51:52,715 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 02:51:52,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 02:51:52,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 02:51:52,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 02:51:52,724 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:51:52" (1/1) ... [2023-04-01 02:51:52,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:51:52" (1/1) ... [2023-04-01 02:51:52,728 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:51:52" (1/1) ... [2023-04-01 02:51:52,728 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:51:52" (1/1) ... [2023-04-01 02:51:52,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:51:52" (1/1) ... [2023-04-01 02:51:52,735 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:51:52" (1/1) ... [2023-04-01 02:51:52,736 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:51:52" (1/1) ... [2023-04-01 02:51:52,736 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:51:52" (1/1) ... [2023-04-01 02:51:52,741 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 02:51:52,742 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 02:51:52,742 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 02:51:52,742 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 02:51:52,742 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:51:52" (1/1) ... [2023-04-01 02:51:52,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:51:52,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:51:52,770 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 02:51:52,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 02:51:52,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 02:51:52,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 02:51:52,798 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 02:51:52,799 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2023-04-01 02:51:52,799 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 02:51:52,799 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 02:51:52,799 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 02:51:52,799 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 02:51:52,799 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 02:51:52,799 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 02:51:52,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 02:51:52,799 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 02:51:52,799 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2023-04-01 02:51:52,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 02:51:52,800 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 02:51:52,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 02:51:52,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 02:51:52,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 02:51:52,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 02:51:52,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 02:51:52,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 02:51:52,848 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 02:51:52,849 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 02:51:53,105 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 02:51:53,176 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 02:51:53,176 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 02:51:53,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:51:53 BoogieIcfgContainer [2023-04-01 02:51:53,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 02:51:53,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 02:51:53,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 02:51:53,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 02:51:53,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 02:51:52" (1/3) ... [2023-04-01 02:51:53,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65287062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:51:53, skipping insertion in model container [2023-04-01 02:51:53,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:51:52" (2/3) ... [2023-04-01 02:51:53,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65287062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:51:53, skipping insertion in model container [2023-04-01 02:51:53,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:51:53" (3/3) ... [2023-04-01 02:51:53,183 INFO L112 eAbstractionObserver]: Analyzing ICFG xor4.i [2023-04-01 02:51:53,194 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 02:51:53,194 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 02:51:53,223 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 02:51:53,227 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;@4b32091a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 02:51:53,227 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 02:51:53,229 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 02:51:53,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 02:51:53,234 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:51:53,234 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:51:53,235 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:51:53,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:51:53,238 INFO L85 PathProgramCache]: Analyzing trace with hash -636747578, now seen corresponding path program 1 times [2023-04-01 02:51:53,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:51:53,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385312546] [2023-04-01 02:51:53,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:51:53,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:51:53,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:51:53,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 02:51:53,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:51:53,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385312546] [2023-04-01 02:51:53,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385312546] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:51:53,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:51:53,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 02:51:53,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67118723] [2023-04-01 02:51:53,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:51:53,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 02:51:53,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:51:53,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 02:51:53,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 02:51:53,532 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 02:51:53,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:51:53,564 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2023-04-01 02:51:53,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 02:51:53,566 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2023-04-01 02:51:53,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:51:53,570 INFO L225 Difference]: With dead ends: 41 [2023-04-01 02:51:53,570 INFO L226 Difference]: Without dead ends: 20 [2023-04-01 02:51:53,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 02:51:53,574 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:51:53,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:51:53,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-01 02:51:53,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-04-01 02:51:53,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:51:53,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-04-01 02:51:53,595 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2023-04-01 02:51:53,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:51:53,596 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-04-01 02:51:53,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 02:51:53,596 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-04-01 02:51:53,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 02:51:53,597 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:51:53,597 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:51:53,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 02:51:53,597 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:51:53,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:51:53,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1297150723, now seen corresponding path program 1 times [2023-04-01 02:51:53,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:51:53,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123359585] [2023-04-01 02:51:53,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:51:53,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:51:53,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:51:53,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 02:51:53,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:51:53,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123359585] [2023-04-01 02:51:53,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123359585] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:51:53,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225194623] [2023-04-01 02:51:53,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:51:53,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:51:53,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:51:53,703 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:51:53,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 02:51:53,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:51:53,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 02:51:53,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:51:53,836 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 02:51:53,837 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 02:51:53,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225194623] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:51:53,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 02:51:53,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-01 02:51:53,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010214035] [2023-04-01 02:51:53,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:51:53,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 02:51:53,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:51:53,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 02:51:53,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 02:51:53,848 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 02:51:53,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:51:53,873 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2023-04-01 02:51:53,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 02:51:53,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2023-04-01 02:51:53,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:51:53,875 INFO L225 Difference]: With dead ends: 33 [2023-04-01 02:51:53,875 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 02:51:53,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 02:51:53,878 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:51:53,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:51:53,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 02:51:53,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 02:51:53,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:51:53,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-04-01 02:51:53,884 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2023-04-01 02:51:53,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:51:53,885 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-04-01 02:51:53,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 02:51:53,885 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-04-01 02:51:53,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 02:51:53,886 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:51:53,886 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:51:53,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 02:51:54,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:51:54,092 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:51:54,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:51:54,093 INFO L85 PathProgramCache]: Analyzing trace with hash -196347971, now seen corresponding path program 1 times [2023-04-01 02:51:54,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:51:54,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787121835] [2023-04-01 02:51:54,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:51:54,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:51:54,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:51:54,235 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 02:51:54,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:51:54,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787121835] [2023-04-01 02:51:54,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787121835] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:51:54,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152403266] [2023-04-01 02:51:54,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:51:54,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:51:54,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:51:54,254 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:51:54,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 02:51:54,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:51:54,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 02:51:54,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:51:54,343 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 02:51:54,344 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 02:51:54,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152403266] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:51:54,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 02:51:54,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-01 02:51:54,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741476885] [2023-04-01 02:51:54,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:51:54,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 02:51:54,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:51:54,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 02:51:54,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 02:51:54,346 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 02:51:54,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:51:54,364 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2023-04-01 02:51:54,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 02:51:54,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-04-01 02:51:54,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:51:54,366 INFO L225 Difference]: With dead ends: 31 [2023-04-01 02:51:54,366 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 02:51:54,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 02:51:54,369 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:51:54,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:51:54,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 02:51:54,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-01 02:51:54,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:51:54,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-04-01 02:51:54,380 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2023-04-01 02:51:54,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:51:54,381 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-04-01 02:51:54,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 02:51:54,381 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-04-01 02:51:54,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 02:51:54,382 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:51:54,382 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:51:54,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 02:51:54,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 02:51:54,598 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:51:54,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:51:54,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1548280975, now seen corresponding path program 1 times [2023-04-01 02:51:54,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:51:54,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122499042] [2023-04-01 02:51:54,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:51:54,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:51:54,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:51:54,693 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 02:51:54,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:51:54,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122499042] [2023-04-01 02:51:54,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122499042] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:51:54,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132350694] [2023-04-01 02:51:54,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:51:54,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:51:54,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:51:54,714 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:51:54,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 02:51:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:51:54,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 02:51:54,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:51:54,864 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 02:51:54,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:51:54,889 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 02:51:54,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132350694] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:51:54,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1209488355] [2023-04-01 02:51:54,915 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:51:54,915 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:51:54,917 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:51:54,921 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:51:54,921 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:51:55,024 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:51:55,185 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 02:51:55,797 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 19 for LOIs [2023-04-01 02:51:55,867 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 02:51:56,018 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:51:56,024 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:51:57,055 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '631#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= 0 (+ main_~ret~0 2147483648)) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 99999 main_~i~2) (<= main_~ret~0 2147483647) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= 100000 main_~i~1) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-01 02:51:57,056 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:51:57,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:51:57,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 02:51:57,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516252272] [2023-04-01 02:51:57,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:51:57,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 02:51:57,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:51:57,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 02:51:57,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=399, Unknown=8, NotChecked=0, Total=506 [2023-04-01 02:51:57,058 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 02:51:57,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:51:57,082 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-04-01 02:51:57,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 02:51:57,083 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 29 [2023-04-01 02:51:57,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:51:57,083 INFO L225 Difference]: With dead ends: 40 [2023-04-01 02:51:57,083 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 02:51:57,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=99, Invalid=399, Unknown=8, NotChecked=0, Total=506 [2023-04-01 02:51:57,085 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:51:57,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:51:57,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 02:51:57,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-04-01 02:51:57,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:51:57,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-04-01 02:51:57,093 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2023-04-01 02:51:57,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:51:57,093 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-04-01 02:51:57,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 02:51:57,093 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-04-01 02:51:57,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 02:51:57,093 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:51:57,094 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:51:57,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 02:51:57,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:51:57,298 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:51:57,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:51:57,299 INFO L85 PathProgramCache]: Analyzing trace with hash -452003718, now seen corresponding path program 2 times [2023-04-01 02:51:57,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:51:57,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152855785] [2023-04-01 02:51:57,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:51:57,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:51:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:51:57,405 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 02:51:57,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:51:57,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152855785] [2023-04-01 02:51:57,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152855785] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:51:57,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125305680] [2023-04-01 02:51:57,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:51:57,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:51:57,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:51:57,426 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:51:57,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 02:51:57,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 02:51:57,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:51:57,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 02:51:57,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:51:57,516 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 02:51:57,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:51:57,535 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 02:51:57,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125305680] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:51:57,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [910103290] [2023-04-01 02:51:57,537 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:51:57,537 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:51:57,537 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:51:57,538 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:51:57,538 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:51:57,553 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:51:57,606 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 02:51:57,872 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 19 for LOIs [2023-04-01 02:51:57,918 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 02:51:58,036 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:51:58,041 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:51:58,972 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '950#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= 0 (+ main_~ret~0 2147483648)) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 99999 main_~i~2) (<= main_~ret~0 2147483647) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= 100000 main_~i~1) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-01 02:51:58,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:51:58,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:51:58,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 02:51:58,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890945956] [2023-04-01 02:51:58,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:51:58,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 02:51:58,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:51:58,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 02:51:58,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=399, Unknown=8, NotChecked=0, Total=506 [2023-04-01 02:51:58,974 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 02:51:58,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:51:58,993 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2023-04-01 02:51:58,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 02:51:58,994 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 32 [2023-04-01 02:51:58,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:51:58,994 INFO L225 Difference]: With dead ends: 42 [2023-04-01 02:51:58,994 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 02:51:58,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=399, Unknown=8, NotChecked=0, Total=506 [2023-04-01 02:51:58,995 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:51:58,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:51:58,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 02:51:58,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-01 02:51:58,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:51:58,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-04-01 02:51:58,998 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 32 [2023-04-01 02:51:58,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:51:58,999 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-04-01 02:51:58,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 02:51:58,999 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-04-01 02:51:58,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 02:51:58,999 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:51:59,000 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:51:59,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 02:51:59,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:51:59,204 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:51:59,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:51:59,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1834963880, now seen corresponding path program 3 times [2023-04-01 02:51:59,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:51:59,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655188933] [2023-04-01 02:51:59,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:51:59,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:51:59,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:51:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-04-01 02:51:59,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:51:59,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655188933] [2023-04-01 02:51:59,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655188933] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:51:59,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54330606] [2023-04-01 02:51:59,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:51:59,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:51:59,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:51:59,305 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:51:59,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 02:51:59,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:51:59,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:51:59,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 02:51:59,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:51:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-01 02:51:59,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:51:59,486 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-01 02:51:59,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54330606] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:51:59,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1061724511] [2023-04-01 02:51:59,488 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:51:59,488 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:51:59,488 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:51:59,489 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:51:59,489 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:51:59,511 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:51:59,578 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 02:51:59,843 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 19 for LOIs [2023-04-01 02:51:59,879 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 02:51:59,955 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:51:59,958 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:52:00,826 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1340#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= 0 (+ main_~ret~0 2147483648)) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 99999 main_~i~2) (<= main_~ret~0 2147483647) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= 100000 main_~i~1) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-01 02:52:00,826 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:52:00,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:52:00,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-04-01 02:52:00,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632216148] [2023-04-01 02:52:00,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:52:00,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 02:52:00,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:52:00,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 02:52:00,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=713, Unknown=8, NotChecked=0, Total=870 [2023-04-01 02:52:00,829 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-01 02:52:00,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:52:00,869 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2023-04-01 02:52:00,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 02:52:00,870 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 41 [2023-04-01 02:52:00,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:52:00,871 INFO L225 Difference]: With dead ends: 53 [2023-04-01 02:52:00,871 INFO L226 Difference]: Without dead ends: 35 [2023-04-01 02:52:00,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=149, Invalid=713, Unknown=8, NotChecked=0, Total=870 [2023-04-01 02:52:00,872 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:52:00,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:52:00,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-01 02:52:00,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-04-01 02:52:00,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:52:00,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-04-01 02:52:00,885 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 41 [2023-04-01 02:52:00,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:52:00,885 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-04-01 02:52:00,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-01 02:52:00,885 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-04-01 02:52:00,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 02:52:00,887 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:52:00,887 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:52:00,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 02:52:01,091 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 [2023-04-01 02:52:01,092 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:52:01,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:52:01,092 INFO L85 PathProgramCache]: Analyzing trace with hash -308882970, now seen corresponding path program 4 times [2023-04-01 02:52:01,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:52:01,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601297037] [2023-04-01 02:52:01,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:52:01,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:52:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:52:01,353 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-04-01 02:52:01,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:52:01,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601297037] [2023-04-01 02:52:01,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601297037] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:52:01,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259018286] [2023-04-01 02:52:01,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:52:01,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:52:01,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:52:01,354 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:52:01,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 02:52:01,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:52:01,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 02:52:01,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:52:01,468 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-04-01 02:52:01,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:52:01,628 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-04-01 02:52:01,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259018286] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:52:01,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1365032863] [2023-04-01 02:52:01,631 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:52:01,631 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:52:01,631 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:52:01,631 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:52:01,631 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:52:01,646 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:52:01,691 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 02:52:01,983 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 19 for LOIs [2023-04-01 02:52:02,022 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 02:52:02,115 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:52:02,118 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:52:03,034 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1819#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= 0 (+ main_~ret~0 2147483648)) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 99999 main_~i~2) (<= main_~ret~0 2147483647) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= 100000 main_~i~1) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-01 02:52:03,034 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:52:03,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:52:03,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-01 02:52:03,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536617390] [2023-04-01 02:52:03,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:52:03,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 02:52:03,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:52:03,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 02:52:03,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=1254, Unknown=8, NotChecked=0, Total=1640 [2023-04-01 02:52:03,036 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 02:52:03,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:52:03,061 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2023-04-01 02:52:03,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 02:52:03,062 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2023-04-01 02:52:03,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:52:03,062 INFO L225 Difference]: With dead ends: 66 [2023-04-01 02:52:03,062 INFO L226 Difference]: Without dead ends: 47 [2023-04-01 02:52:03,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=378, Invalid=1254, Unknown=8, NotChecked=0, Total=1640 [2023-04-01 02:52:03,064 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:52:03,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:52:03,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-01 02:52:03,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-04-01 02:52:03,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:52:03,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2023-04-01 02:52:03,070 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 48 [2023-04-01 02:52:03,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:52:03,070 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2023-04-01 02:52:03,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 02:52:03,070 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2023-04-01 02:52:03,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 02:52:03,080 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:52:03,080 INFO L195 NwaCegarLoop]: trace histogram [22, 12, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:52:03,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 02:52:03,280 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 [2023-04-01 02:52:03,281 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:52:03,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:52:03,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1704653606, now seen corresponding path program 5 times [2023-04-01 02:52:03,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:52:03,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335670141] [2023-04-01 02:52:03,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:52:03,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:52:03,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:52:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-04-01 02:52:03,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:52:03,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335670141] [2023-04-01 02:52:03,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335670141] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:52:03,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077565751] [2023-04-01 02:52:03,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:52:03,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:52:03,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:52:03,872 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:52:03,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 02:52:03,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 02:52:03,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:52:03,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 02:52:03,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:52:04,070 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-04-01 02:52:04,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:52:04,157 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-04-01 02:52:04,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077565751] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:52:04,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [747797886] [2023-04-01 02:52:04,159 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:52:04,159 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:52:04,159 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:52:04,160 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:52:04,160 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:52:04,173 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:52:04,213 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 02:52:04,441 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 19 for LOIs [2023-04-01 02:52:04,482 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 02:52:04,554 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:52:04,557 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:52:05,707 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2430#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= 0 (+ main_~ret~0 2147483648)) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 99999 main_~i~2) (<= main_~ret~0 2147483647) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= 100000 main_~i~1) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-01 02:52:05,708 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:52:05,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:52:05,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2023-04-01 02:52:05,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725614375] [2023-04-01 02:52:05,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:52:05,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-01 02:52:05,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:52:05,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-01 02:52:05,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=2099, Unknown=8, NotChecked=0, Total=2550 [2023-04-01 02:52:05,710 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 02:52:05,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:52:05,758 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2023-04-01 02:52:05,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-01 02:52:05,758 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 60 [2023-04-01 02:52:05,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:52:05,759 INFO L225 Difference]: With dead ends: 73 [2023-04-01 02:52:05,759 INFO L226 Difference]: Without dead ends: 54 [2023-04-01 02:52:05,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=443, Invalid=2099, Unknown=8, NotChecked=0, Total=2550 [2023-04-01 02:52:05,760 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:52:05,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 136 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:52:05,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-04-01 02:52:05,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-04-01 02:52:05,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:52:05,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2023-04-01 02:52:05,764 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 60 [2023-04-01 02:52:05,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:52:05,764 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2023-04-01 02:52:05,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 02:52:05,764 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2023-04-01 02:52:05,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 02:52:05,765 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:52:05,765 INFO L195 NwaCegarLoop]: trace histogram [30, 23, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:52:05,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-01 02:52:05,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:52:05,966 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:52:05,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:52:05,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1340593117, now seen corresponding path program 6 times [2023-04-01 02:52:05,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:52:05,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332316725] [2023-04-01 02:52:05,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:52:05,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:52:06,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:52:06,720 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-04-01 02:52:06,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:52:06,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332316725] [2023-04-01 02:52:06,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332316725] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:52:06,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931722424] [2023-04-01 02:52:06,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:52:06,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:52:06,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:52:06,721 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:52:06,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 02:52:06,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:52:06,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:52:06,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 02:52:06,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:52:06,908 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-04-01 02:52:06,908 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:52:07,495 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-04-01 02:52:07,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931722424] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:52:07,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [441953681] [2023-04-01 02:52:07,497 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:52:07,497 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:52:07,497 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:52:07,497 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:52:07,497 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:52:07,511 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:52:07,568 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 02:52:07,783 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 19 for LOIs [2023-04-01 02:52:07,837 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 02:52:07,909 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:52:07,912 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:52:09,086 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3199#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= 0 (+ main_~ret~0 2147483648)) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 99999 main_~i~2) (<= main_~ret~0 2147483647) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= 100000 main_~i~1) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-01 02:52:09,086 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:52:09,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:52:09,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-04-01 02:52:09,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598465390] [2023-04-01 02:52:09,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:52:09,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-04-01 02:52:09,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:52:09,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-04-01 02:52:09,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1353, Invalid=3061, Unknown=8, NotChecked=0, Total=4422 [2023-04-01 02:52:09,089 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 02:52:09,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:52:09,134 INFO L93 Difference]: Finished difference Result 104 states and 136 transitions. [2023-04-01 02:52:09,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-04-01 02:52:09,135 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 79 [2023-04-01 02:52:09,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:52:09,135 INFO L225 Difference]: With dead ends: 104 [2023-04-01 02:52:09,135 INFO L226 Difference]: Without dead ends: 79 [2023-04-01 02:52:09,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1353, Invalid=3061, Unknown=8, NotChecked=0, Total=4422 [2023-04-01 02:52:09,137 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:52:09,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:52:09,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-04-01 02:52:09,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-04-01 02:52:09,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:52:09,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2023-04-01 02:52:09,141 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 79 [2023-04-01 02:52:09,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:52:09,141 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2023-04-01 02:52:09,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 02:52:09,141 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2023-04-01 02:52:09,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-04-01 02:52:09,142 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:52:09,142 INFO L195 NwaCegarLoop]: trace histogram [48, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:52:09,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 02:52:09,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-01 02:52:09,348 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:52:09,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:52:09,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1695975354, now seen corresponding path program 7 times [2023-04-01 02:52:09,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:52:09,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324965632] [2023-04-01 02:52:09,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:52:09,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:52:09,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:52:11,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-04-01 02:52:11,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:52:11,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324965632] [2023-04-01 02:52:11,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324965632] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:52:11,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169461154] [2023-04-01 02:52:11,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:52:11,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:52:11,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:52:11,213 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:52:11,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 02:52:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:52:11,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-01 02:52:11,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:52:11,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-04-01 02:52:11,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:52:13,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-04-01 02:52:13,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169461154] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:52:13,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [67331764] [2023-04-01 02:52:13,843 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:52:13,844 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:52:13,844 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:52:13,844 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:52:13,844 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:52:13,874 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:52:13,913 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 02:52:14,114 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 19 for LOIs [2023-04-01 02:52:14,149 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 02:52:14,216 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:52:14,219 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:52:15,530 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4280#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= 0 (+ main_~ret~0 2147483648)) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 99999 main_~i~2) (<= main_~ret~0 2147483647) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= 100000 main_~i~1) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-01 02:52:15,530 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:52:15,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:52:15,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2023-04-01 02:52:15,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773893089] [2023-04-01 02:52:15,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:52:15,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-04-01 02:52:15,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:52:15,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-04-01 02:52:15,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5128, Invalid=8436, Unknown=8, NotChecked=0, Total=13572 [2023-04-01 02:52:15,535 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 101 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 02:52:15,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:52:15,645 INFO L93 Difference]: Finished difference Result 154 states and 211 transitions. [2023-04-01 02:52:15,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-04-01 02:52:15,645 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 101 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 104 [2023-04-01 02:52:15,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:52:15,648 INFO L225 Difference]: With dead ends: 154 [2023-04-01 02:52:15,648 INFO L226 Difference]: Without dead ends: 129 [2023-04-01 02:52:15,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2730 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5128, Invalid=8436, Unknown=8, NotChecked=0, Total=13572 [2023-04-01 02:52:15,652 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:52:15,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:52:15,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-04-01 02:52:15,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-04-01 02:52:15,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 121 states have (on average 1.024793388429752) internal successors, (124), 121 states have internal predecessors, (124), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:52:15,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2023-04-01 02:52:15,670 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 104 [2023-04-01 02:52:15,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:52:15,670 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2023-04-01 02:52:15,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 101 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 02:52:15,671 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2023-04-01 02:52:15,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-04-01 02:52:15,671 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:52:15,671 INFO L195 NwaCegarLoop]: trace histogram [98, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:52:15,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 02:52:15,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 02:52:15,881 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:52:15,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:52:15,881 INFO L85 PathProgramCache]: Analyzing trace with hash 2051752998, now seen corresponding path program 8 times [2023-04-01 02:52:15,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:52:15,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106548986] [2023-04-01 02:52:15,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:52:15,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:52:16,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:52:20,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-04-01 02:52:20,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:52:20,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106548986] [2023-04-01 02:52:20,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106548986] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:52:20,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076404124] [2023-04-01 02:52:20,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:52:20,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:52:20,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:52:20,937 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:52:20,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 02:52:21,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 02:52:21,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:52:21,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 02:52:21,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:52:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 246 proven. 3 refuted. 0 times theorem prover too weak. 5139 trivial. 0 not checked. [2023-04-01 02:52:21,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:52:21,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5385 trivial. 0 not checked. [2023-04-01 02:52:21,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076404124] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:52:21,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [809243655] [2023-04-01 02:52:21,336 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:52:21,336 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:52:21,337 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:52:21,337 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:52:21,337 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:52:21,349 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:52:21,397 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 02:52:21,614 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 19 for LOIs [2023-04-01 02:52:21,676 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 02:52:21,742 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:52:21,745 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:52:23,602 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5867#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= 0 (+ main_~ret~0 2147483648)) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 99999 main_~i~2) (<= main_~ret~0 2147483647) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= 100000 main_~i~1) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-01 02:52:23,602 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:52:23,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:52:23,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 5, 5] total 107 [2023-04-01 02:52:23,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101260077] [2023-04-01 02:52:23,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:52:23,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2023-04-01 02:52:23,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:52:23,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2023-04-01 02:52:23,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5155, Invalid=9843, Unknown=8, NotChecked=0, Total=15006 [2023-04-01 02:52:23,607 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand has 107 states, 107 states have (on average 1.1775700934579438) internal successors, (126), 107 states have internal predecessors, (126), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 02:52:23,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:52:23,749 INFO L93 Difference]: Finished difference Result 159 states and 171 transitions. [2023-04-01 02:52:23,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-04-01 02:52:23,749 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.1775700934579438) internal successors, (126), 107 states have internal predecessors, (126), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 154 [2023-04-01 02:52:23,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:52:23,751 INFO L225 Difference]: With dead ends: 159 [2023-04-01 02:52:23,751 INFO L226 Difference]: Without dead ends: 134 [2023-04-01 02:52:23,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 440 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2412 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5155, Invalid=9843, Unknown=8, NotChecked=0, Total=15006 [2023-04-01 02:52:23,754 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:52:23,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 121 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:52:23,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-04-01 02:52:23,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2023-04-01 02:52:23,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 126 states have (on average 1.0238095238095237) internal successors, (129), 126 states have internal predecessors, (129), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:52:23,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2023-04-01 02:52:23,765 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 154 [2023-04-01 02:52:23,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:52:23,765 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2023-04-01 02:52:23,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.1775700934579438) internal successors, (126), 107 states have internal predecessors, (126), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 02:52:23,765 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2023-04-01 02:52:23,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-04-01 02:52:23,766 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:52:23,766 INFO L195 NwaCegarLoop]: trace histogram [99, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:52:23,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 02:52:23,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-01 02:52:23,971 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:52:23,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:52:23,972 INFO L85 PathProgramCache]: Analyzing trace with hash -2118868067, now seen corresponding path program 9 times [2023-04-01 02:52:23,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:52:23,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053413517] [2023-04-01 02:52:23,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:52:23,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:52:24,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:52:27,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2023-04-01 02:52:27,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:52:27,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053413517] [2023-04-01 02:52:27,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053413517] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:52:27,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587409919] [2023-04-01 02:52:27,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:52:27,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:52:27,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:52:27,860 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:52:27,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 02:52:28,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:52:28,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:52:28,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 1208 conjuncts, 101 conjunts are in the unsatisfiable core [2023-04-01 02:52:28,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:52:28,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2023-04-01 02:52:28,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:52:36,524 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2023-04-01 02:52:36,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587409919] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:52:36,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1115251473] [2023-04-01 02:52:36,526 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:52:36,526 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:52:36,526 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:52:36,526 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:52:36,526 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:52:36,540 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:52:36,616 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 02:52:36,947 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 19 for LOIs [2023-04-01 02:52:36,982 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 02:52:37,049 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:52:37,052 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:52:38,582 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7600#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= 0 (+ main_~ret~0 2147483648)) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 99999 main_~i~2) (<= main_~ret~0 2147483647) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (<= 100000 main_~i~1) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-01 02:52:38,582 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:52:38,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:52:38,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2023-04-01 02:52:38,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764841047] [2023-04-01 02:52:38,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:52:38,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-04-01 02:52:38,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:52:38,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-04-01 02:52:38,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20581, Invalid=27153, Unknown=8, NotChecked=0, Total=47742 [2023-04-01 02:52:38,589 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand has 203 states, 203 states have (on average 1.0738916256157636) internal successors, (218), 203 states have internal predecessors, (218), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 02:52:38,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:52:38,859 INFO L93 Difference]: Finished difference Result 264 states and 372 transitions. [2023-04-01 02:52:38,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-04-01 02:52:38,859 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0738916256157636) internal successors, (218), 203 states have internal predecessors, (218), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 159 [2023-04-01 02:52:38,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:52:38,860 INFO L225 Difference]: With dead ends: 264 [2023-04-01 02:52:38,860 INFO L226 Difference]: Without dead ends: 235 [2023-04-01 02:52:38,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 360 SyntacticMatches, 1 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5535 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=20581, Invalid=27153, Unknown=8, NotChecked=0, Total=47742 [2023-04-01 02:52:38,863 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:52:38,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:52:38,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-04-01 02:52:38,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2023-04-01 02:52:38,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 227 states have (on average 1.013215859030837) internal successors, (230), 227 states have internal predecessors, (230), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:52:38,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 239 transitions. [2023-04-01 02:52:38,870 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 239 transitions. Word has length 159 [2023-04-01 02:52:38,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:52:38,870 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 239 transitions. [2023-04-01 02:52:38,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0738916256157636) internal successors, (218), 203 states have internal predecessors, (218), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 02:52:38,870 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 239 transitions. [2023-04-01 02:52:38,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2023-04-01 02:52:38,872 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:52:38,872 INFO L195 NwaCegarLoop]: trace histogram [200, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:52:38,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 02:52:39,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 02:52:39,079 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:52:39,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:52:39,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1362611014, now seen corresponding path program 10 times [2023-04-01 02:52:39,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:52:39,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209077326] [2023-04-01 02:52:39,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:52:39,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:52:39,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:52:57,475 INFO L134 CoverageAnalysis]: Checked inductivity of 20655 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2023-04-01 02:52:57,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:52:57,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209077326] [2023-04-01 02:52:57,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209077326] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:52:57,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936774598] [2023-04-01 02:52:57,476 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:52:57,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:52:57,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:52:57,477 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:52:57,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 02:52:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:52:57,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 2117 conjuncts, 202 conjunts are in the unsatisfiable core [2023-04-01 02:52:57,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:52:58,218 INFO L134 CoverageAnalysis]: Checked inductivity of 20655 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2023-04-01 02:52:58,218 INFO L327 TraceCheckSpWp]: Computing backward predicates...