/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/array-crafted/xor4.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 08:55:20,774 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 08:55:20,775 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 08:55:20,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 08:55:20,792 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 08:55:20,793 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 08:55:20,794 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 08:55:20,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 08:55:20,796 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 08:55:20,796 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 08:55:20,797 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 08:55:20,797 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 08:55:20,798 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 08:55:20,798 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 08:55:20,799 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 08:55:20,799 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 08:55:20,800 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 08:55:20,800 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 08:55:20,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 08:55:20,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 08:55:20,803 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 08:55:20,806 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 08:55:20,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 08:55:20,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 08:55:20,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 08:55:20,809 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 08:55:20,809 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 08:55:20,810 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 08:55:20,810 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 08:55:20,810 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 08:55:20,811 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 08:55:20,811 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 08:55:20,812 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 08:55:20,812 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 08:55:20,813 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 08:55:20,813 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 08:55:20,813 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 08:55:20,813 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 08:55:20,814 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 08:55:20,814 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 08:55:20,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 08:55:20,820 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 08:55:20,847 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 08:55:20,847 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 08:55:20,848 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 08:55:20,848 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 08:55:20,848 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 08:55:20,848 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 08:55:20,848 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 08:55:20,848 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 08:55:20,849 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 08:55:20,849 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 08:55:20,849 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 08:55:20,849 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 08:55:20,849 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 08:55:20,849 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 08:55:20,850 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 08:55:20,850 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 08:55:20,850 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 08:55:20,850 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 08:55:20,850 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 08:55:20,850 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 08:55:20,850 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 08:55:20,850 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 08:55:20,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 08:55:20,851 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 08:55:20,851 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 08:55:20,851 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 08:55:20,851 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 08:55:20,851 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 08:55:20,851 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 08:55:20,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 08:55:20,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 08:55:20,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 08:55:20,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:55:20,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 08:55:20,852 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 08:55:20,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 08:55:20,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 08:55:20,852 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 08:55:20,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 08:55:20,852 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 08:55:20,852 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 08:55:20,852 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 08:55:20,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 08:55:21,005 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 08:55:21,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 08:55:21,008 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 08:55:21,008 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 08:55:21,009 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/xor4.i [2023-04-01 08:55:22,032 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 08:55:22,204 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 08:55:22,204 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor4.i [2023-04-01 08:55:22,208 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59afe5e07/4a96ff82aeb54e8eb50ecfd7348fae81/FLAG592ef8264 [2023-04-01 08:55:22,225 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59afe5e07/4a96ff82aeb54e8eb50ecfd7348fae81 [2023-04-01 08:55:22,227 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 08:55:22,229 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 08:55:22,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 08:55:22,231 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 08:55:22,234 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 08:55:22,234 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:55:22" (1/1) ... [2023-04-01 08:55:22,235 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e9d2c37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:22, skipping insertion in model container [2023-04-01 08:55:22,235 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:55:22" (1/1) ... [2023-04-01 08:55:22,240 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 08:55:22,250 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 08:55:22,342 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 08:55:22,345 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:55:22,350 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 08:55:22,362 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 08:55:22,363 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:55:22,371 INFO L208 MainTranslator]: Completed translation [2023-04-01 08:55:22,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:22 WrapperNode [2023-04-01 08:55:22,372 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 08:55:22,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 08:55:22,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 08:55:22,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 08:55:22,380 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:22" (1/1) ... [2023-04-01 08:55:22,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:22" (1/1) ... [2023-04-01 08:55:22,384 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:22" (1/1) ... [2023-04-01 08:55:22,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:22" (1/1) ... [2023-04-01 08:55:22,389 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:22" (1/1) ... [2023-04-01 08:55:22,391 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:22" (1/1) ... [2023-04-01 08:55:22,392 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:22" (1/1) ... [2023-04-01 08:55:22,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:22" (1/1) ... [2023-04-01 08:55:22,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 08:55:22,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 08:55:22,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 08:55:22,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 08:55:22,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:22" (1/1) ... [2023-04-01 08:55:22,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:55:22,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:55:22,423 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 08:55:22,427 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 08:55:22,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 08:55:22,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 08:55:22,453 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 08:55:22,453 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2023-04-01 08:55:22,453 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 08:55:22,453 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 08:55:22,453 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 08:55:22,453 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 08:55:22,453 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 08:55:22,454 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 08:55:22,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 08:55:22,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 08:55:22,454 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2023-04-01 08:55:22,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 08:55:22,454 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 08:55:22,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 08:55:22,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 08:55:22,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 08:55:22,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 08:55:22,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 08:55:22,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 08:55:22,524 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 08:55:22,526 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 08:55:22,640 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 08:55:22,741 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 08:55:22,741 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 08:55:22,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:55:22 BoogieIcfgContainer [2023-04-01 08:55:22,743 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 08:55:22,744 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 08:55:22,744 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 08:55:22,761 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 08:55:22,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:55:22" (1/3) ... [2023-04-01 08:55:22,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@611d9a8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:55:22, skipping insertion in model container [2023-04-01 08:55:22,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:22" (2/3) ... [2023-04-01 08:55:22,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@611d9a8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:55:22, skipping insertion in model container [2023-04-01 08:55:22,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:55:22" (3/3) ... [2023-04-01 08:55:22,762 INFO L112 eAbstractionObserver]: Analyzing ICFG xor4.i [2023-04-01 08:55:22,774 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 08:55:22,774 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 08:55:22,823 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 08:55:22,828 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;@15223893, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 08:55:22,829 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 08:55:22,832 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 08:55:22,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 08:55:22,843 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:55:22,844 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 08:55:22,844 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:55:22,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:55:22,850 INFO L85 PathProgramCache]: Analyzing trace with hash -636747578, now seen corresponding path program 1 times [2023-04-01 08:55:22,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:55:22,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486324225] [2023-04-01 08:55:22,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:55:22,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:55:22,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:55:23,095 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 08:55:23,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:55:23,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486324225] [2023-04-01 08:55:23,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486324225] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:55:23,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 08:55:23,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 08:55:23,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342063326] [2023-04-01 08:55:23,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:55:23,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 08:55:23,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:55:23,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 08:55:23,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 08:55:23,138 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 08:55:23,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:55:23,195 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2023-04-01 08:55:23,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 08:55:23,198 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 08:55:23,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:55:23,202 INFO L225 Difference]: With dead ends: 41 [2023-04-01 08:55:23,203 INFO L226 Difference]: Without dead ends: 20 [2023-04-01 08:55:23,206 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 08:55:23,208 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 08:55:23,209 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 08:55:23,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-01 08:55:23,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-04-01 08:55:23,235 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 08:55:23,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-04-01 08:55:23,237 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2023-04-01 08:55:23,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:55:23,238 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-04-01 08:55:23,239 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 08:55:23,239 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-04-01 08:55:23,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 08:55:23,241 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:55:23,241 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 08:55:23,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 08:55:23,242 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:55:23,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:55:23,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1297150723, now seen corresponding path program 1 times [2023-04-01 08:55:23,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:55:23,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492806143] [2023-04-01 08:55:23,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:55:23,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:55:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:55:23,402 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 08:55:23,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:55:23,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492806143] [2023-04-01 08:55:23,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492806143] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:55:23,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511034343] [2023-04-01 08:55:23,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:55:23,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:55:23,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:55:23,423 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 08:55:23,425 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 08:55:23,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:55:23,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 08:55:23,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:55:23,535 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 08:55:23,536 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 08:55:23,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511034343] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:55:23,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 08:55:23,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-01 08:55:23,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145437721] [2023-04-01 08:55:23,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:55:23,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 08:55:23,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:55:23,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 08:55:23,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 08:55:23,546 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 08:55:23,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:55:23,569 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2023-04-01 08:55:23,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 08:55:23,570 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 08:55:23,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:55:23,571 INFO L225 Difference]: With dead ends: 33 [2023-04-01 08:55:23,572 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 08:55:23,572 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 08:55:23,573 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 08:55:23,574 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 08:55:23,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 08:55:23,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 08:55:23,578 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 08:55:23,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-04-01 08:55:23,579 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2023-04-01 08:55:23,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:55:23,580 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-04-01 08:55:23,580 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 08:55:23,580 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-04-01 08:55:23,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 08:55:23,581 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:55:23,581 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 08:55:23,588 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 08:55:23,785 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 08:55:23,785 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:55:23,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:55:23,787 INFO L85 PathProgramCache]: Analyzing trace with hash -196347971, now seen corresponding path program 1 times [2023-04-01 08:55:23,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:55:23,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573016883] [2023-04-01 08:55:23,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:55:23,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:55:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:55:23,922 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 08:55:23,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:55:23,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573016883] [2023-04-01 08:55:23,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573016883] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:55:23,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823864291] [2023-04-01 08:55:23,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:55:23,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:55:23,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:55:23,933 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 08:55:24,017 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 08:55:24,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:55:24,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 08:55:24,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:55:24,079 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 08:55:24,079 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 08:55:24,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823864291] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:55:24,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 08:55:24,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-01 08:55:24,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476020037] [2023-04-01 08:55:24,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:55:24,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 08:55:24,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:55:24,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 08:55:24,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 08:55:24,082 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 08:55:24,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:55:24,098 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2023-04-01 08:55:24,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 08:55:24,098 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 08:55:24,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:55:24,100 INFO L225 Difference]: With dead ends: 31 [2023-04-01 08:55:24,100 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 08:55:24,101 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 08:55:24,103 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 08:55:24,104 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 08:55:24,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 08:55:24,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-01 08:55:24,113 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 08:55:24,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-04-01 08:55:24,114 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2023-04-01 08:55:24,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:55:24,115 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-04-01 08:55:24,115 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 08:55:24,115 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-04-01 08:55:24,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 08:55:24,117 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:55:24,117 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 08:55:24,133 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 08:55:24,334 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 08:55:24,334 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:55:24,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:55:24,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1548280975, now seen corresponding path program 1 times [2023-04-01 08:55:24,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:55:24,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050060555] [2023-04-01 08:55:24,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:55:24,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:55:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:55:24,431 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 08:55:24,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:55:24,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050060555] [2023-04-01 08:55:24,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050060555] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:55:24,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680379537] [2023-04-01 08:55:24,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:55:24,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:55:24,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:55:24,477 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 08:55:24,478 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 08:55:24,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:55:24,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 08:55:24,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:55:24,564 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 08:55:24,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:55:24,590 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 08:55:24,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680379537] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:55:24,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2069615616] [2023-04-01 08:55:24,621 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:55:24,622 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:55:24,624 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:55:24,627 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:55:24,627 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:55:24,758 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 74 for LOIs [2023-04-01 08:55:26,356 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 22 for LOIs [2023-04-01 08:55:26,598 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:55:26,602 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:55:27,703 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '631#(and (= 7 (select |old(#length)| 2)) (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select (select |old(#memory_int)| 2) 3) 52) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 2) 0) 120) (= (select (select |old(#memory_int)| 1) 0) 48) (= (select (select |old(#memory_int)| 2) 5) 99) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= (select (select |old(#memory_int)| 2) 4) 46) (= (select (select |old(#memory_int)| 2) 6) 0) (= 111 (select (select |old(#memory_int)| 2) 1)) (= (select (select |old(#memory_int)| 2) 2) 114) (= |#NULL.base| 0))' at error location [2023-04-01 08:55:27,703 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:55:27,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:55:27,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 08:55:27,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992473984] [2023-04-01 08:55:27,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:55:27,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 08:55:27,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:55:27,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 08:55:27,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-04-01 08:55:27,705 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 08:55:27,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:55:27,723 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-04-01 08:55:27,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 08:55:27,724 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 08:55:27,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:55:27,725 INFO L225 Difference]: With dead ends: 40 [2023-04-01 08:55:27,725 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 08:55:27,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-04-01 08:55:27,726 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 08:55:27,726 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 08:55:27,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 08:55:27,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-04-01 08:55:27,728 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 08:55:27,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-04-01 08:55:27,729 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2023-04-01 08:55:27,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:55:27,729 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-04-01 08:55:27,729 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 08:55:27,729 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-04-01 08:55:27,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 08:55:27,729 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:55:27,729 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 08:55:27,751 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 08:55:27,934 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 08:55:27,934 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:55:27,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:55:27,935 INFO L85 PathProgramCache]: Analyzing trace with hash -452003718, now seen corresponding path program 2 times [2023-04-01 08:55:27,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:55:27,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580693626] [2023-04-01 08:55:27,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:55:27,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:55:27,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:55:28,023 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 08:55:28,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:55:28,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580693626] [2023-04-01 08:55:28,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580693626] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:55:28,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221689731] [2023-04-01 08:55:28,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:55:28,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:55:28,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:55:28,041 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 08:55:28,079 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 08:55:28,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 08:55:28,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:55:28,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 08:55:28,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:55:28,135 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 08:55:28,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:55:28,153 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 08:55:28,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221689731] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:55:28,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1102932043] [2023-04-01 08:55:28,156 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:55:28,157 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:55:28,157 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:55:28,157 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:55:28,157 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:55:28,193 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 74 for LOIs [2023-04-01 08:55:29,230 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 22 for LOIs [2023-04-01 08:55:29,410 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:55:29,413 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:55:30,272 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '947#(and (= 7 (select |old(#length)| 2)) (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select (select |old(#memory_int)| 2) 3) 52) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 2) 0) 120) (= (select (select |old(#memory_int)| 1) 0) 48) (= (select (select |old(#memory_int)| 2) 5) 99) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= (select (select |old(#memory_int)| 2) 4) 46) (= (select (select |old(#memory_int)| 2) 6) 0) (= 111 (select (select |old(#memory_int)| 2) 1)) (= (select (select |old(#memory_int)| 2) 2) 114) (= |#NULL.base| 0))' at error location [2023-04-01 08:55:30,272 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:55:30,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:55:30,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 08:55:30,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381408905] [2023-04-01 08:55:30,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:55:30,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 08:55:30,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:55:30,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 08:55:30,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-04-01 08:55:30,273 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 08:55:30,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:55:30,290 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2023-04-01 08:55:30,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 08:55:30,290 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 08:55:30,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:55:30,291 INFO L225 Difference]: With dead ends: 42 [2023-04-01 08:55:30,291 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 08:55:30,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-04-01 08:55:30,291 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:55:30,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:55:30,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 08:55:30,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-01 08:55:30,294 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 08:55:30,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-04-01 08:55:30,294 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 32 [2023-04-01 08:55:30,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:55:30,294 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-04-01 08:55:30,295 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 08:55:30,295 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-04-01 08:55:30,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 08:55:30,295 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:55:30,295 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 08:55:30,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 08:55:30,499 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 08:55:30,500 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:55:30,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:55:30,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1834963880, now seen corresponding path program 3 times [2023-04-01 08:55:30,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:55:30,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417989234] [2023-04-01 08:55:30,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:55:30,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:55:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:55:30,575 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 08:55:30,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:55:30,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417989234] [2023-04-01 08:55:30,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417989234] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:55:30,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145511574] [2023-04-01 08:55:30,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:55:30,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:55:30,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:55:30,587 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 08:55:30,634 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 08:55:30,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:55:30,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:55:30,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 08:55:30,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:55:30,724 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 08:55:30,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:55:30,778 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 08:55:30,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145511574] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:55:30,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [682011587] [2023-04-01 08:55:30,779 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:55:30,779 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:55:30,779 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:55:30,780 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:55:30,780 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:55:30,807 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 74 for LOIs [2023-04-01 08:55:31,781 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 22 for LOIs [2023-04-01 08:55:31,928 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:55:31,931 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:55:32,823 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1334#(and (= 7 (select |old(#length)| 2)) (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select (select |old(#memory_int)| 2) 3) 52) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 2) 0) 120) (= (select (select |old(#memory_int)| 1) 0) 48) (= (select (select |old(#memory_int)| 2) 5) 99) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= (select (select |old(#memory_int)| 2) 4) 46) (= (select (select |old(#memory_int)| 2) 6) 0) (= 111 (select (select |old(#memory_int)| 2) 1)) (= (select (select |old(#memory_int)| 2) 2) 114) (= |#NULL.base| 0))' at error location [2023-04-01 08:55:32,824 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:55:32,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:55:32,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-04-01 08:55:32,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166229522] [2023-04-01 08:55:32,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:55:32,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 08:55:32,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:55:32,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 08:55:32,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2023-04-01 08:55:32,826 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 08:55:32,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:55:32,886 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2023-04-01 08:55:32,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 08:55:32,888 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 08:55:32,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:55:32,888 INFO L225 Difference]: With dead ends: 53 [2023-04-01 08:55:32,888 INFO L226 Difference]: Without dead ends: 35 [2023-04-01 08:55:32,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2023-04-01 08:55:32,889 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:55:32,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:55:32,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-01 08:55:32,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-04-01 08:55:32,892 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 08:55:32,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-04-01 08:55:32,892 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 41 [2023-04-01 08:55:32,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:55:32,892 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-04-01 08:55:32,892 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 08:55:32,892 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-04-01 08:55:32,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 08:55:32,893 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:55:32,893 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 08:55:32,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 08:55:33,093 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 08:55:33,093 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:55:33,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:55:33,094 INFO L85 PathProgramCache]: Analyzing trace with hash -308882970, now seen corresponding path program 4 times [2023-04-01 08:55:33,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:55:33,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089236621] [2023-04-01 08:55:33,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:55:33,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:55:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:55:33,286 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 08:55:33,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:55:33,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089236621] [2023-04-01 08:55:33,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089236621] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:55:33,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053517609] [2023-04-01 08:55:33,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 08:55:33,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:55:33,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:55:33,297 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 08:55:33,361 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 08:55:33,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:55:33,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 08:55:33,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:55:33,436 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 08:55:33,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:55:33,579 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 08:55:33,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053517609] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:55:33,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2060569764] [2023-04-01 08:55:33,581 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:55:33,581 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:55:33,581 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:55:33,581 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:55:33,581 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:55:33,609 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 74 for LOIs [2023-04-01 08:55:34,422 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 22 for LOIs [2023-04-01 08:55:34,565 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:55:34,568 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:55:35,534 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1810#(and (= 7 (select |old(#length)| 2)) (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select (select |old(#memory_int)| 2) 3) 52) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 2) 0) 120) (= (select (select |old(#memory_int)| 1) 0) 48) (= (select (select |old(#memory_int)| 2) 5) 99) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= (select (select |old(#memory_int)| 2) 4) 46) (= (select (select |old(#memory_int)| 2) 6) 0) (= 111 (select (select |old(#memory_int)| 2) 1)) (= (select (select |old(#memory_int)| 2) 2) 114) (= |#NULL.base| 0))' at error location [2023-04-01 08:55:35,534 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:55:35,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:55:35,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-01 08:55:35,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104548093] [2023-04-01 08:55:35,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:55:35,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 08:55:35,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:55:35,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 08:55:35,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=1069, Unknown=0, NotChecked=0, Total=1406 [2023-04-01 08:55:35,537 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 08:55:35,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:55:35,583 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2023-04-01 08:55:35,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 08:55:35,583 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 08:55:35,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:55:35,584 INFO L225 Difference]: With dead ends: 66 [2023-04-01 08:55:35,584 INFO L226 Difference]: Without dead ends: 47 [2023-04-01 08:55:35,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=337, Invalid=1069, Unknown=0, NotChecked=0, Total=1406 [2023-04-01 08:55:35,585 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:55:35,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 136 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:55:35,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-01 08:55:35,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-04-01 08:55:35,589 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 08:55:35,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2023-04-01 08:55:35,589 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 48 [2023-04-01 08:55:35,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:55:35,590 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2023-04-01 08:55:35,590 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 08:55:35,590 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2023-04-01 08:55:35,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 08:55:35,590 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:55:35,591 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 08:55:35,602 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 08:55:35,795 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 08:55:35,796 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:55:35,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:55:35,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1704653606, now seen corresponding path program 5 times [2023-04-01 08:55:35,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:55:35,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851096450] [2023-04-01 08:55:35,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:55:35,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:55:35,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:55:36,288 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 08:55:36,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:55:36,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851096450] [2023-04-01 08:55:36,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851096450] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:55:36,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668782449] [2023-04-01 08:55:36,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:55:36,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:55:36,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:55:36,290 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 08:55:36,290 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 08:55:36,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 08:55:36,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:55:36,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 08:55:36,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:55:36,436 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 08:55:36,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:55:36,522 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 08:55:36,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668782449] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:55:36,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1937207886] [2023-04-01 08:55:36,523 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:55:36,523 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:55:36,524 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:55:36,524 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:55:36,524 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:55:36,552 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 74 for LOIs [2023-04-01 08:55:37,371 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 22 for LOIs [2023-04-01 08:55:37,512 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:55:37,515 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:55:38,580 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2418#(and (= 7 (select |old(#length)| 2)) (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select (select |old(#memory_int)| 2) 3) 52) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 2) 0) 120) (= (select (select |old(#memory_int)| 1) 0) 48) (= (select (select |old(#memory_int)| 2) 5) 99) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= (select (select |old(#memory_int)| 2) 4) 46) (= (select (select |old(#memory_int)| 2) 6) 0) (= 111 (select (select |old(#memory_int)| 2) 1)) (= (select (select |old(#memory_int)| 2) 2) 114) (= |#NULL.base| 0))' at error location [2023-04-01 08:55:38,580 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:55:38,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:55:38,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2023-04-01 08:55:38,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653739173] [2023-04-01 08:55:38,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:55:38,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-01 08:55:38,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:55:38,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-01 08:55:38,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=1854, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 08:55:38,583 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 08:55:38,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:55:38,654 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2023-04-01 08:55:38,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-01 08:55:38,655 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 08:55:38,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:55:38,656 INFO L225 Difference]: With dead ends: 73 [2023-04-01 08:55:38,656 INFO L226 Difference]: Without dead ends: 54 [2023-04-01 08:55:38,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=402, Invalid=1854, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 08:55:38,657 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:55:38,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:55:38,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-04-01 08:55:38,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-04-01 08:55:38,660 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 08:55:38,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2023-04-01 08:55:38,661 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 60 [2023-04-01 08:55:38,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:55:38,661 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2023-04-01 08:55:38,661 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 08:55:38,661 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2023-04-01 08:55:38,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 08:55:38,662 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:55:38,662 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 08:55:38,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 08:55:38,869 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 08:55:38,869 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:55:38,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:55:38,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1340593117, now seen corresponding path program 6 times [2023-04-01 08:55:38,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:55:38,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419226788] [2023-04-01 08:55:38,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:55:38,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:55:38,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:55:39,617 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 08:55:39,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:55:39,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419226788] [2023-04-01 08:55:39,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419226788] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:55:39,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496878356] [2023-04-01 08:55:39,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:55:39,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:55:39,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:55:39,633 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 08:55:39,697 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 08:55:39,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:55:39,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:55:39,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 08:55:39,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:55:39,875 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 08:55:39,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:55:40,445 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 08:55:40,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496878356] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:55:40,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [930198638] [2023-04-01 08:55:40,446 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:55:40,446 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:55:40,446 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:55:40,447 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:55:40,447 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:55:40,478 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 74 for LOIs [2023-04-01 08:55:41,268 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 22 for LOIs [2023-04-01 08:55:41,409 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:55:41,412 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:55:42,467 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3184#(and (= 7 (select |old(#length)| 2)) (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select (select |old(#memory_int)| 2) 3) 52) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 2) 0) 120) (= (select (select |old(#memory_int)| 1) 0) 48) (= (select (select |old(#memory_int)| 2) 5) 99) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= (select (select |old(#memory_int)| 2) 4) 46) (= (select (select |old(#memory_int)| 2) 6) 0) (= 111 (select (select |old(#memory_int)| 2) 1)) (= (select (select |old(#memory_int)| 2) 2) 114) (= |#NULL.base| 0))' at error location [2023-04-01 08:55:42,467 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:55:42,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:55:42,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-04-01 08:55:42,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314778480] [2023-04-01 08:55:42,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:55:42,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-04-01 08:55:42,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:55:42,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-04-01 08:55:42,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1312, Invalid=2720, Unknown=0, NotChecked=0, Total=4032 [2023-04-01 08:55:42,470 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 08:55:42,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:55:42,553 INFO L93 Difference]: Finished difference Result 104 states and 136 transitions. [2023-04-01 08:55:42,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-04-01 08:55:42,553 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 08:55:42,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:55:42,554 INFO L225 Difference]: With dead ends: 104 [2023-04-01 08:55:42,554 INFO L226 Difference]: Without dead ends: 79 [2023-04-01 08:55:42,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1312, Invalid=2720, Unknown=0, NotChecked=0, Total=4032 [2023-04-01 08:55:42,558 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:55:42,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:55:42,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-04-01 08:55:42,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-04-01 08:55:42,573 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 08:55:42,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2023-04-01 08:55:42,573 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 79 [2023-04-01 08:55:42,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:55:42,573 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2023-04-01 08:55:42,574 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 08:55:42,574 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2023-04-01 08:55:42,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-04-01 08:55:42,574 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:55:42,574 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 08:55:42,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-04-01 08:55:42,782 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 08:55:42,782 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:55:42,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:55:42,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1695975354, now seen corresponding path program 7 times [2023-04-01 08:55:42,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:55:42,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405234650] [2023-04-01 08:55:42,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:55:42,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:55:42,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:55:44,538 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 08:55:44,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:55:44,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405234650] [2023-04-01 08:55:44,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405234650] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:55:44,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049304550] [2023-04-01 08:55:44,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 08:55:44,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:55:44,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:55:44,540 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 08:55:44,542 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 08:55:44,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:55:44,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-01 08:55:44,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:55:44,781 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 08:55:44,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:55:47,169 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 08:55:47,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049304550] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:55:47,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [166065354] [2023-04-01 08:55:47,170 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:55:47,170 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:55:47,170 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:55:47,170 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:55:47,170 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:55:47,225 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 74 for LOIs [2023-04-01 08:55:48,008 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 22 for LOIs [2023-04-01 08:55:48,147 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:55:48,150 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:55:49,235 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4262#(and (= 7 (select |old(#length)| 2)) (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select (select |old(#memory_int)| 2) 3) 52) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 2) 0) 120) (= (select (select |old(#memory_int)| 1) 0) 48) (= (select (select |old(#memory_int)| 2) 5) 99) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= (select (select |old(#memory_int)| 2) 4) 46) (= (select (select |old(#memory_int)| 2) 6) 0) (= 111 (select (select |old(#memory_int)| 2) 1)) (= (select (select |old(#memory_int)| 2) 2) 114) (= |#NULL.base| 0))' at error location [2023-04-01 08:55:49,235 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:55:49,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:55:49,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2023-04-01 08:55:49,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614478624] [2023-04-01 08:55:49,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:55:49,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-04-01 08:55:49,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:55:49,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-04-01 08:55:49,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5087, Invalid=7795, Unknown=0, NotChecked=0, Total=12882 [2023-04-01 08:55:49,240 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 08:55:49,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:55:49,334 INFO L93 Difference]: Finished difference Result 154 states and 211 transitions. [2023-04-01 08:55:49,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-04-01 08:55:49,335 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 08:55:49,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:55:49,336 INFO L225 Difference]: With dead ends: 154 [2023-04-01 08:55:49,336 INFO L226 Difference]: Without dead ends: 129 [2023-04-01 08:55:49,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2135 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5087, Invalid=7795, Unknown=0, NotChecked=0, Total=12882 [2023-04-01 08:55:49,339 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:55:49,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:55:49,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-04-01 08:55:49,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-04-01 08:55:49,345 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 08:55:49,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2023-04-01 08:55:49,346 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 104 [2023-04-01 08:55:49,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:55:49,346 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2023-04-01 08:55:49,346 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 08:55:49,346 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2023-04-01 08:55:49,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-04-01 08:55:49,347 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:55:49,347 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 08:55:49,373 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 08:55:49,557 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 08:55:49,557 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:55:49,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:55:49,558 INFO L85 PathProgramCache]: Analyzing trace with hash 2051752998, now seen corresponding path program 8 times [2023-04-01 08:55:49,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:55:49,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119107237] [2023-04-01 08:55:49,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:55:49,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:55:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:55:54,499 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 08:55:54,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:55:54,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119107237] [2023-04-01 08:55:54,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119107237] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:55:54,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163423768] [2023-04-01 08:55:54,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:55:54,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:55:54,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:55:54,508 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 08:55:54,511 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 08:55:54,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 08:55:54,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:55:54,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 08:55:54,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:55:54,777 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 08:55:54,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:55:54,899 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 08:55:54,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163423768] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:55:54,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [937000245] [2023-04-01 08:55:54,901 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:55:54,901 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:55:54,901 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:55:54,901 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:55:54,901 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:55:54,927 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 74 for LOIs [2023-04-01 08:55:55,712 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 22 for LOIs [2023-04-01 08:55:55,876 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:55:55,878 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:55:57,207 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5846#(and (= 7 (select |old(#length)| 2)) (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select (select |old(#memory_int)| 2) 3) 52) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 2) 0) 120) (= (select (select |old(#memory_int)| 1) 0) 48) (= (select (select |old(#memory_int)| 2) 5) 99) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= (select (select |old(#memory_int)| 2) 4) 46) (= (select (select |old(#memory_int)| 2) 6) 0) (= 111 (select (select |old(#memory_int)| 2) 1)) (= (select (select |old(#memory_int)| 2) 2) 114) (= |#NULL.base| 0))' at error location [2023-04-01 08:55:57,207 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:55:57,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:55:57,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 5, 5] total 107 [2023-04-01 08:55:57,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294122588] [2023-04-01 08:55:57,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:55:57,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2023-04-01 08:55:57,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:55:57,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2023-04-01 08:55:57,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5114, Invalid=9166, Unknown=0, NotChecked=0, Total=14280 [2023-04-01 08:55:57,222 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 08:55:57,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:55:57,341 INFO L93 Difference]: Finished difference Result 159 states and 171 transitions. [2023-04-01 08:55:57,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-04-01 08:55:57,341 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 08:55:57,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:55:57,342 INFO L225 Difference]: With dead ends: 159 [2023-04-01 08:55:57,342 INFO L226 Difference]: Without dead ends: 134 [2023-04-01 08:55:57,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1985 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5114, Invalid=9166, Unknown=0, NotChecked=0, Total=14280 [2023-04-01 08:55:57,345 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:55:57,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 151 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:55:57,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-04-01 08:55:57,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2023-04-01 08:55:57,350 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 08:55:57,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2023-04-01 08:55:57,351 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 154 [2023-04-01 08:55:57,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:55:57,351 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2023-04-01 08:55:57,351 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 08:55:57,351 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2023-04-01 08:55:57,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-04-01 08:55:57,352 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:55:57,352 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 08:55:57,365 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 08:55:57,565 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 08:55:57,566 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:55:57,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:55:57,566 INFO L85 PathProgramCache]: Analyzing trace with hash -2118868067, now seen corresponding path program 9 times [2023-04-01 08:55:57,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:55:57,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100706258] [2023-04-01 08:55:57,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:55:57,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:55:57,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:56:01,666 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 08:56:01,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:56:01,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100706258] [2023-04-01 08:56:01,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100706258] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:56:01,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271996672] [2023-04-01 08:56:01,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:56:01,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:56:01,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:56:01,668 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 08:56:01,671 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 08:56:01,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:56:01,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:56:01,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 1208 conjuncts, 101 conjunts are in the unsatisfiable core [2023-04-01 08:56:01,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:56:02,062 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 08:56:02,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:56:07,545 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 08:56:07,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271996672] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:56:07,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1522904688] [2023-04-01 08:56:07,547 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:56:07,547 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:56:07,547 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:56:07,547 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:56:07,547 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:56:07,572 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 74 for LOIs [2023-04-01 08:56:08,464 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 22 for LOIs [2023-04-01 08:56:08,601 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:56:08,604 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:56:10,032 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7576#(and (= 7 (select |old(#length)| 2)) (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select (select |old(#memory_int)| 2) 3) 52) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 2) 0) 120) (= (select (select |old(#memory_int)| 1) 0) 48) (= (select (select |old(#memory_int)| 2) 5) 99) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= (select (select |old(#memory_int)| 2) 4) 46) (= (select (select |old(#memory_int)| 2) 6) 0) (= 111 (select (select |old(#memory_int)| 2) 1)) (= (select (select |old(#memory_int)| 2) 2) 114) (= |#NULL.base| 0))' at error location [2023-04-01 08:56:10,032 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:56:10,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:56:10,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2023-04-01 08:56:10,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302693701] [2023-04-01 08:56:10,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:56:10,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-04-01 08:56:10,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:56:10,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-04-01 08:56:10,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20540, Invalid=25900, Unknown=0, NotChecked=0, Total=46440 [2023-04-01 08:56:10,042 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 08:56:10,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:56:10,301 INFO L93 Difference]: Finished difference Result 264 states and 372 transitions. [2023-04-01 08:56:10,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-04-01 08:56:10,302 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 08:56:10,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:56:10,303 INFO L225 Difference]: With dead ends: 264 [2023-04-01 08:56:10,303 INFO L226 Difference]: Without dead ends: 235 [2023-04-01 08:56:10,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4328 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=20540, Invalid=25900, Unknown=0, NotChecked=0, Total=46440 [2023-04-01 08:56:10,305 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:56:10,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:56:10,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-04-01 08:56:10,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2023-04-01 08:56:10,312 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 08:56:10,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 239 transitions. [2023-04-01 08:56:10,313 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 239 transitions. Word has length 159 [2023-04-01 08:56:10,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:56:10,313 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 239 transitions. [2023-04-01 08:56:10,313 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 08:56:10,313 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 239 transitions. [2023-04-01 08:56:10,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2023-04-01 08:56:10,316 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:56:10,316 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 08:56:10,337 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 08:56:10,523 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 08:56:10,523 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:56:10,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:56:10,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1362611014, now seen corresponding path program 10 times [2023-04-01 08:56:10,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:56:10,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912814034] [2023-04-01 08:56:10,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:56:10,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:56:10,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat