/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-lopstr16/break-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:02:28,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:02:28,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:02:28,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:02:28,797 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:02:28,800 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:02:28,804 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:02:28,806 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:02:28,807 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:02:28,812 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:02:28,813 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:02:28,814 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:02:28,814 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:02:28,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:02:28,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:02:28,816 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:02:28,816 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:02:28,817 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:02:28,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:02:28,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:02:28,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:02:28,823 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:02:28,825 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:02:28,826 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:02:28,834 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:02:28,835 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:02:28,835 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:02:28,836 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:02:28,836 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:02:28,837 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:02:28,838 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:02:28,838 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:02:28,839 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:02:28,840 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:02:28,841 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:02:28,841 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:02:28,841 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:02:28,841 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:02:28,842 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:02:28,842 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:02:28,843 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:02:28,844 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 09:02:28,875 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:02:28,876 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:02:28,876 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:02:28,876 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:02:28,879 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:02:28,879 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:02:28,880 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:02:28,880 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:02:28,880 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:02:28,880 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:02:28,881 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:02:28,881 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:02:28,881 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:02:28,881 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:02:28,881 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:02:28,881 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:02:28,881 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:02:28,882 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:02:28,882 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:02:28,882 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:02:28,882 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:02:28,882 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:02:28,882 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:02:28,883 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:02:28,883 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:02:28,883 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:02:28,883 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:02:28,883 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:02:28,883 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:02:28,884 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:02:28,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:02:28,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:02:28,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:02:28,884 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:02:28,884 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:02:28,885 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:02:28,885 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:02:28,885 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:02:28,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:02:28,885 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:02:28,885 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:02:28,885 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:02:29,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:02:29,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:02:29,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:02:29,132 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:02:29,132 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:02:29,134 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-lopstr16/break-2.i [2023-04-01 09:02:30,274 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:02:30,461 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:02:30,462 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/break-2.i [2023-04-01 09:02:30,467 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/623eb7e19/51f26a8bb46b4b47bb2bdb8b5260117e/FLAGe8e0e9b39 [2023-04-01 09:02:30,486 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/623eb7e19/51f26a8bb46b4b47bb2bdb8b5260117e [2023-04-01 09:02:30,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:02:30,491 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:02:30,493 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:02:30,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:02:30,496 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:02:30,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:02:30" (1/1) ... [2023-04-01 09:02:30,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c746ea2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:02:30, skipping insertion in model container [2023-04-01 09:02:30,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:02:30" (1/1) ... [2023-04-01 09:02:30,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:02:30,523 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:02:30,643 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-lopstr16/break-2.i[800,813] [2023-04-01 09:02:30,654 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:02:35,495 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:02:35,504 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-lopstr16/break-2.i[800,813] [2023-04-01 09:02:35,507 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:02:35,522 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:02:35,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:02:35 WrapperNode [2023-04-01 09:02:35,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:02:35,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:02:35,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:02:35,524 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:02:35,534 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:02:35" (1/1) ... [2023-04-01 09:02:35,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:02:35" (1/1) ... [2023-04-01 09:02:35,540 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:02:35" (1/1) ... [2023-04-01 09:02:35,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:02:35" (1/1) ... [2023-04-01 09:02:35,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:02:35" (1/1) ... [2023-04-01 09:02:35,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:02:35" (1/1) ... [2023-04-01 09:02:35,549 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:02:35" (1/1) ... [2023-04-01 09:02:35,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:02:35" (1/1) ... [2023-04-01 09:02:35,551 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:02:35,552 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:02:35,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:02:35,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:02:35,553 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:02:35" (1/1) ... [2023-04-01 09:02:35,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:02:35,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:02:35,578 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 09:02:35,583 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 09:02:35,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:02:35,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:02:35,607 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:02:35,607 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 09:02:35,607 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:02:35,607 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:02:35,607 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:02:35,608 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 09:02:35,608 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 09:02:35,608 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:02:35,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:02:35,608 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 09:02:35,608 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:02:35,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:02:35,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:02:35,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:02:35,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:02:35,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:02:35,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:02:35,685 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:02:35,687 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:02:35,780 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:02:35,800 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:02:35,801 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 09:02:35,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:02:35 BoogieIcfgContainer [2023-04-01 09:02:35,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:02:35,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:02:35,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:02:35,808 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:02:35,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:02:30" (1/3) ... [2023-04-01 09:02:35,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7af82954 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:02:35, skipping insertion in model container [2023-04-01 09:02:35,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:02:35" (2/3) ... [2023-04-01 09:02:35,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7af82954 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:02:35, skipping insertion in model container [2023-04-01 09:02:35,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:02:35" (3/3) ... [2023-04-01 09:02:35,810 INFO L112 eAbstractionObserver]: Analyzing ICFG break-2.i [2023-04-01 09:02:35,825 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:02:35,825 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:02:35,877 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:02:35,884 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;@3da4d9ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:02:35,884 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:02:35,888 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:02:35,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 09:02:35,894 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:02:35,895 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:02:35,895 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:02:35,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:02:35,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1797247767, now seen corresponding path program 1 times [2023-04-01 09:02:35,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:02:35,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471904647] [2023-04-01 09:02:35,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:02:35,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:02:35,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:02:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:02:36,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:02:36,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471904647] [2023-04-01 09:02:36,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471904647] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:02:36,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:02:36,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:02:36,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601554438] [2023-04-01 09:02:36,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:02:36,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:02:36,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:02:36,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:02:36,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:02:36,100 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:02:36,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:02:36,145 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2023-04-01 09:02:36,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:02:36,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-04-01 09:02:36,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:02:36,152 INFO L225 Difference]: With dead ends: 44 [2023-04-01 09:02:36,153 INFO L226 Difference]: Without dead ends: 26 [2023-04-01 09:02:36,155 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 09:02:36,158 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 09:02:36,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 30 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 09:02:36,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-01 09:02:36,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2023-04-01 09:02:36,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:02:36,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-04-01 09:02:36,188 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 13 [2023-04-01 09:02:36,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:02:36,189 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-04-01 09:02:36,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:02:36,189 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-04-01 09:02:36,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 09:02:36,190 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:02:36,190 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:02:36,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:02:36,191 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:02:36,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:02:36,191 INFO L85 PathProgramCache]: Analyzing trace with hash -195052990, now seen corresponding path program 1 times [2023-04-01 09:02:36,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:02:36,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776430625] [2023-04-01 09:02:36,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:02:36,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:02:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:02:36,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:02:36,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:02:36,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776430625] [2023-04-01 09:02:36,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776430625] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:02:36,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312059091] [2023-04-01 09:02:36,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:02:36,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:02:36,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:02:36,331 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 09:02:36,346 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 09:02:36,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:02:36,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 09:02:36,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:02:36,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:02:36,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:02:36,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:02:36,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312059091] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:02:36,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1563717139] [2023-04-01 09:02:36,555 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 09:02:36,555 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:02:36,558 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:02:36,563 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:02:36,563 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:02:36,722 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 39 for LOIs [2023-04-01 09:02:36,989 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2023-04-01 09:02:37,021 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-01 09:02:37,038 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:02:37,821 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '213#(and (= |~#s~0.base| 3) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (not (= (select (select |#memory_int| 3) 0) 10)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |~#s~0.offset| 0) (= |#NULL.offset| 0) (= 10 (select |#length| 2)) (= |#NULL.base| 0) (= 4000000 (select |#length| 3)))' at error location [2023-04-01 09:02:37,821 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:02:37,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 09:02:37,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 09:02:37,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951040250] [2023-04-01 09:02:37,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 09:02:37,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 09:02:37,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:02:37,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 09:02:37,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-04-01 09:02:37,825 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:02:37,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:02:37,891 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2023-04-01 09:02:37,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 09:02:37,892 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-04-01 09:02:37,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:02:37,894 INFO L225 Difference]: With dead ends: 51 [2023-04-01 09:02:37,894 INFO L226 Difference]: Without dead ends: 37 [2023-04-01 09:02:37,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-04-01 09:02:37,899 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 09:02:37,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 33 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 09:02:37,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-01 09:02:37,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2023-04-01 09:02:37,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:02:37,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-04-01 09:02:37,912 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 15 [2023-04-01 09:02:37,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:02:37,912 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-04-01 09:02:37,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:02:37,912 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-04-01 09:02:37,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 09:02:37,913 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:02:37,914 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:02:37,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 09:02:38,119 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 09:02:38,119 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:02:38,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:02:38,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1152100192, now seen corresponding path program 1 times [2023-04-01 09:02:38,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:02:38,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034053433] [2023-04-01 09:02:38,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:02:38,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:02:38,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:02:38,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:02:38,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:02:38,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034053433] [2023-04-01 09:02:38,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034053433] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:02:38,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50919428] [2023-04-01 09:02:38,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:02:38,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:02:38,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:02:38,250 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 09:02:38,253 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 09:02:38,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:02:38,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:02:38,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:02:38,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:02:38,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:02:38,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:02:38,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50919428] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:02:38,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2116699904] [2023-04-01 09:02:38,335 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 09:02:38,335 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:02:38,335 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:02:38,335 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:02:38,335 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:02:38,386 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 39 for LOIs [2023-04-01 09:02:38,522 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2023-04-01 09:02:38,544 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-01 09:02:38,556 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:02:39,154 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '452#(and (= |~#s~0.base| 3) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (not (= (select (select |#memory_int| 3) 0) 10)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |~#s~0.offset| 0) (= |#NULL.offset| 0) (= 10 (select |#length| 2)) (= |#NULL.base| 0) (= 4000000 (select |#length| 3)))' at error location [2023-04-01 09:02:39,154 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:02:39,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 09:02:39,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-04-01 09:02:39,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606606236] [2023-04-01 09:02:39,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 09:02:39,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 09:02:39,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:02:39,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 09:02:39,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2023-04-01 09:02:39,156 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:02:39,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:02:39,268 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2023-04-01 09:02:39,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:02:39,268 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-04-01 09:02:39,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:02:39,270 INFO L225 Difference]: With dead ends: 78 [2023-04-01 09:02:39,270 INFO L226 Difference]: Without dead ends: 59 [2023-04-01 09:02:39,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2023-04-01 09:02:39,271 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 27 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:02:39,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 48 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:02:39,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-04-01 09:02:39,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2023-04-01 09:02:39,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 09:02:39,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2023-04-01 09:02:39,279 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 18 [2023-04-01 09:02:39,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:02:39,279 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2023-04-01 09:02:39,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:02:39,280 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2023-04-01 09:02:39,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 09:02:39,280 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:02:39,284 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:02:39,295 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 09:02:39,496 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 09:02:39,496 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:02:39,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:02:39,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1563746108, now seen corresponding path program 2 times [2023-04-01 09:02:39,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:02:39,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010509910] [2023-04-01 09:02:39,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:02:39,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:02:39,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:02:39,612 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:02:39,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:02:39,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010509910] [2023-04-01 09:02:39,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010509910] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:02:39,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113889081] [2023-04-01 09:02:39,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:02:39,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:02:39,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:02:39,615 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 09:02:39,625 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 09:02:39,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-04-01 09:02:39,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:02:39,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 09:02:39,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:02:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:02:39,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:02:39,807 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:02:39,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113889081] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:02:39,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [567296489] [2023-04-01 09:02:39,810 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 09:02:39,811 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:02:39,811 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:02:39,811 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:02:39,811 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:02:39,871 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 39 for LOIs [2023-04-01 09:02:40,011 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2023-04-01 09:02:40,055 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-01 09:02:40,063 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:02:40,641 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '825#(and (= |~#s~0.base| 3) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (not (= (select (select |#memory_int| 3) 0) 10)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |~#s~0.offset| 0) (= |#NULL.offset| 0) (= 10 (select |#length| 2)) (= |#NULL.base| 0) (= 4000000 (select |#length| 3)))' at error location [2023-04-01 09:02:40,641 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:02:40,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 09:02:40,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-04-01 09:02:40,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424458563] [2023-04-01 09:02:40,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 09:02:40,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 09:02:40,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:02:40,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 09:02:40,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=552, Unknown=0, NotChecked=0, Total=756 [2023-04-01 09:02:40,644 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:02:40,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:02:40,815 INFO L93 Difference]: Finished difference Result 154 states and 191 transitions. [2023-04-01 09:02:40,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 09:02:40,816 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-04-01 09:02:40,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:02:40,817 INFO L225 Difference]: With dead ends: 154 [2023-04-01 09:02:40,817 INFO L226 Difference]: Without dead ends: 115 [2023-04-01 09:02:40,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=204, Invalid=552, Unknown=0, NotChecked=0, Total=756 [2023-04-01 09:02:40,819 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 105 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:02:40,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 47 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:02:40,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-04-01 09:02:40,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2023-04-01 09:02:40,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 95 states have internal predecessors, (98), 16 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-04-01 09:02:40,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 129 transitions. [2023-04-01 09:02:40,843 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 129 transitions. Word has length 26 [2023-04-01 09:02:40,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:02:40,843 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 129 transitions. [2023-04-01 09:02:40,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:02:40,844 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 129 transitions. [2023-04-01 09:02:40,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 09:02:40,844 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:02:40,845 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:02:40,854 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 09:02:41,054 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 09:02:41,055 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:02:41,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:02:41,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1048238196, now seen corresponding path program 3 times [2023-04-01 09:02:41,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:02:41,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290183840] [2023-04-01 09:02:41,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:02:41,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:02:41,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:02:41,400 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:02:41,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:02:41,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290183840] [2023-04-01 09:02:41,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290183840] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:02:41,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65574254] [2023-04-01 09:02:41,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 09:02:41,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:02:41,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:02:41,403 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 09:02:41,406 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 09:02:41,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 09:02:41,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:02:41,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 09:02:41,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:02:41,512 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:02:41,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:02:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:02:41,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65574254] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:02:41,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1791998460] [2023-04-01 09:02:41,808 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 09:02:41,808 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:02:41,808 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:02:41,809 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:02:41,809 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:02:41,868 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 39 for LOIs [2023-04-01 09:02:41,966 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2023-04-01 09:02:41,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-01 09:02:41,985 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:02:42,546 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1498#(and (= |~#s~0.base| 3) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (not (= (select (select |#memory_int| 3) 0) 10)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |~#s~0.offset| 0) (= |#NULL.offset| 0) (= 10 (select |#length| 2)) (= |#NULL.base| 0) (= 4000000 (select |#length| 3)))' at error location [2023-04-01 09:02:42,547 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:02:42,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 09:02:42,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2023-04-01 09:02:42,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101944317] [2023-04-01 09:02:42,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 09:02:42,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-01 09:02:42,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:02:42,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-01 09:02:42,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=628, Invalid=1264, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 09:02:42,550 INFO L87 Difference]: Start difference. First operand 114 states and 129 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:02:42,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:02:42,881 INFO L93 Difference]: Finished difference Result 306 states and 383 transitions. [2023-04-01 09:02:42,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-04-01 09:02:42,881 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2023-04-01 09:02:42,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:02:42,883 INFO L225 Difference]: With dead ends: 306 [2023-04-01 09:02:42,883 INFO L226 Difference]: Without dead ends: 227 [2023-04-01 09:02:42,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=628, Invalid=1264, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 09:02:42,885 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 219 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:02:42,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 108 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:02:42,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-04-01 09:02:42,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2023-04-01 09:02:42,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 191 states have (on average 1.0157068062827226) internal successors, (194), 191 states have internal predecessors, (194), 32 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-04-01 09:02:42,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 257 transitions. [2023-04-01 09:02:42,905 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 257 transitions. Word has length 42 [2023-04-01 09:02:42,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:02:42,905 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 257 transitions. [2023-04-01 09:02:42,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:02:42,905 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 257 transitions. [2023-04-01 09:02:42,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-01 09:02:42,907 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:02:42,907 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:02:42,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 09:02:43,113 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 09:02:43,113 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:02:43,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:02:43,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1104512284, now seen corresponding path program 4 times [2023-04-01 09:02:43,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:02:43,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018832100] [2023-04-01 09:02:43,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:02:43,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:02:43,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:02:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:02:44,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:02:44,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018832100] [2023-04-01 09:02:44,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018832100] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:02:44,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505701339] [2023-04-01 09:02:44,033 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 09:02:44,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:02:44,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:02:44,038 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 09:02:44,041 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 09:02:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:02:44,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 32 conjunts are in the unsatisfiable core [2023-04-01 09:02:44,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:02:44,223 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:02:44,224 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:02:45,339 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:02:45,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505701339] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:02:45,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1943201869] [2023-04-01 09:02:45,341 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 09:02:45,341 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:02:45,342 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:02:45,342 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:02:45,342 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:02:45,392 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 39 for LOIs [2023-04-01 09:02:45,484 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2023-04-01 09:02:45,497 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-01 09:02:45,504 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:02:46,120 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2771#(and (= |~#s~0.base| 3) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (not (= (select (select |#memory_int| 3) 0) 10)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |~#s~0.offset| 0) (= |#NULL.offset| 0) (= 10 (select |#length| 2)) (= |#NULL.base| 0) (= 4000000 (select |#length| 3)))' at error location [2023-04-01 09:02:46,120 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:02:46,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 09:02:46,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2023-04-01 09:02:46,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250924176] [2023-04-01 09:02:46,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 09:02:46,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-04-01 09:02:46,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:02:46,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-04-01 09:02:46,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2244, Invalid=3456, Unknown=0, NotChecked=0, Total=5700 [2023-04-01 09:02:46,126 INFO L87 Difference]: Start difference. First operand 226 states and 257 transitions. Second operand has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:02:47,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:02:47,118 INFO L93 Difference]: Finished difference Result 610 states and 767 transitions. [2023-04-01 09:02:47,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-04-01 09:02:47,119 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2023-04-01 09:02:47,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:02:47,122 INFO L225 Difference]: With dead ends: 610 [2023-04-01 09:02:47,122 INFO L226 Difference]: Without dead ends: 451 [2023-04-01 09:02:47,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2244, Invalid=3456, Unknown=0, NotChecked=0, Total=5700 [2023-04-01 09:02:47,126 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 840 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 902 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 532 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 09:02:47,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [902 Valid, 95 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [532 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 09:02:47,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2023-04-01 09:02:47,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 450. [2023-04-01 09:02:47,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 383 states have (on average 1.0078328981723237) internal successors, (386), 383 states have internal predecessors, (386), 64 states have call successors, (64), 3 states have call predecessors, (64), 2 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2023-04-01 09:02:47,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 513 transitions. [2023-04-01 09:02:47,159 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 513 transitions. Word has length 74 [2023-04-01 09:02:47,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:02:47,159 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 513 transitions. [2023-04-01 09:02:47,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:02:47,160 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 513 transitions. [2023-04-01 09:02:47,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-04-01 09:02:47,163 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:02:47,163 INFO L195 NwaCegarLoop]: trace histogram [63, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:02:47,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 09:02:47,369 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 09:02:47,369 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:02:47,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:02:47,370 INFO L85 PathProgramCache]: Analyzing trace with hash 177766340, now seen corresponding path program 5 times [2023-04-01 09:02:47,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:02:47,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665746114] [2023-04-01 09:02:47,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:02:47,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:02:47,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:02:50,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:02:50,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:02:50,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665746114] [2023-04-01 09:02:50,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665746114] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:02:50,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294893756] [2023-04-01 09:02:50,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:02:50,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:02:50,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:02:50,035 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 09:02:50,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process