/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-cav19/array_init_pair_symmetr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:01:38,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:01:38,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:01:38,912 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:01:38,912 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:01:38,919 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:01:38,920 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:01:38,921 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:01:38,923 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:01:38,923 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:01:38,924 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:01:38,925 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:01:38,925 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:01:38,926 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:01:38,927 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:01:38,928 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:01:38,929 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:01:38,930 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:01:38,931 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:01:38,940 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:01:38,943 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:01:38,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:01:38,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:01:38,949 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:01:38,952 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:01:38,952 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:01:38,952 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:01:38,953 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:01:38,953 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:01:38,954 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:01:38,954 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:01:38,955 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:01:38,955 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:01:38,956 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:01:38,962 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:01:38,963 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:01:38,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:01:38,963 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:01:38,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:01:38,966 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:01:38,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:01:38,968 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 09:01:38,999 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:01:39,000 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:01:39,000 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:01:39,000 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:01:39,001 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:01:39,001 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:01:39,001 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:01:39,001 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:01:39,004 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:01:39,004 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:01:39,005 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:01:39,005 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:01:39,005 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:01:39,005 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:01:39,005 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:01:39,006 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:01:39,006 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:01:39,006 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:01:39,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:01:39,007 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:01:39,007 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:01:39,007 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:01:39,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:01:39,007 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:01:39,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:01:39,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:01:39,008 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:01:39,008 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:01:39,008 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:01:39,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:01:39,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:01:39,008 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:01:39,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:01:39,008 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:01:39,009 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:01:39,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:01:39,009 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:01:39,009 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:01:39,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:01:39,009 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:01:39,009 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:01:39,009 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:01:39,260 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:01:39,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:01:39,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:01:39,290 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:01:39,290 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:01:39,292 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c [2023-04-01 09:01:40,394 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:01:40,557 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:01:40,558 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c [2023-04-01 09:01:40,564 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22caf0a81/39cec1a103ab4324b6c8a9494aa8b3b6/FLAG1744c9bb6 [2023-04-01 09:01:40,579 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22caf0a81/39cec1a103ab4324b6c8a9494aa8b3b6 [2023-04-01 09:01:40,581 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:01:40,582 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:01:40,583 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:01:40,583 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:01:40,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:01:40,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:01:40" (1/1) ... [2023-04-01 09:01:40,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@313f87e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:01:40, skipping insertion in model container [2023-04-01 09:01:40,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:01:40" (1/1) ... [2023-04-01 09:01:40,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:01:40,606 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:01:40,713 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-cav19/array_init_pair_symmetr.c[414,427] [2023-04-01 09:01:40,725 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:01:40,732 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:01:40,742 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-cav19/array_init_pair_symmetr.c[414,427] [2023-04-01 09:01:40,750 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:01:40,762 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:01:40,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:01:40 WrapperNode [2023-04-01 09:01:40,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:01:40,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:01:40,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:01:40,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:01:40,772 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:01:40" (1/1) ... [2023-04-01 09:01:40,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:01:40" (1/1) ... [2023-04-01 09:01:40,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:01:40" (1/1) ... [2023-04-01 09:01:40,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:01:40" (1/1) ... [2023-04-01 09:01:40,784 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:01:40" (1/1) ... [2023-04-01 09:01:40,788 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:01:40" (1/1) ... [2023-04-01 09:01:40,789 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:01:40" (1/1) ... [2023-04-01 09:01:40,790 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:01:40" (1/1) ... [2023-04-01 09:01:40,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:01:40,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:01:40,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:01:40,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:01:40,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:01:40" (1/1) ... [2023-04-01 09:01:40,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:01:40,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:01:40,819 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 09:01:40,827 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 09:01:40,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:01:40,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:01:40,854 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:01:40,855 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 09:01:40,855 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 09:01:40,855 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:01:40,856 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:01:40,856 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:01:40,856 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:01:40,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:01:40,857 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 09:01:40,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 09:01:40,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:01:40,857 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:01:40,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 09:01:40,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:01:40,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:01:40,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:01:40,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:01:40,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:01:40,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:01:40,914 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:01:40,916 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:01:41,110 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:01:41,160 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:01:41,177 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 09:01:41,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:01:41 BoogieIcfgContainer [2023-04-01 09:01:41,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:01:41,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:01:41,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:01:41,184 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:01:41,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:01:40" (1/3) ... [2023-04-01 09:01:41,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d165f00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:01:41, skipping insertion in model container [2023-04-01 09:01:41,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:01:40" (2/3) ... [2023-04-01 09:01:41,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d165f00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:01:41, skipping insertion in model container [2023-04-01 09:01:41,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:01:41" (3/3) ... [2023-04-01 09:01:41,186 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_pair_symmetr.c [2023-04-01 09:01:41,223 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:01:41,232 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:01:41,283 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:01:41,289 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;@7cab1a4c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:01:41,289 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:01:41,293 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), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 09:01:41,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 09:01:41,300 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:01:41,300 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:01:41,301 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:01:41,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:01:41,307 INFO L85 PathProgramCache]: Analyzing trace with hash 491814218, now seen corresponding path program 1 times [2023-04-01 09:01:41,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:01:41,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362364848] [2023-04-01 09:01:41,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:01:41,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:01:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:01:41,578 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 09:01:41,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:01:41,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362364848] [2023-04-01 09:01:41,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362364848] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:01:41,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:01:41,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 09:01:41,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976658170] [2023-04-01 09:01:41,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:01:41,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 09:01:41,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:01:41,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 09:01:41,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 09:01:41,611 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), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 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 09:01:41,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:01:41,698 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2023-04-01 09:01:41,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 09:01:41,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-01 09:01:41,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:01:41,706 INFO L225 Difference]: With dead ends: 40 [2023-04-01 09:01:41,706 INFO L226 Difference]: Without dead ends: 24 [2023-04-01 09:01:41,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 09:01:41,712 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:01:41,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 21 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:01:41,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-01 09:01:41,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2023-04-01 09:01:41,750 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), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:01:41,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-04-01 09:01:41,752 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 12 [2023-04-01 09:01:41,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:01:41,753 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-04-01 09:01:41,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 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 09:01:41,753 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-04-01 09:01:41,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 09:01:41,754 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:01:41,754 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:01:41,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:01:41,754 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:01:41,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:01:41,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1594593385, now seen corresponding path program 1 times [2023-04-01 09:01:41,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:01:41,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367678054] [2023-04-01 09:01:41,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:01:41,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:01:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:01:41,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 09:01:41,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:01:41,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367678054] [2023-04-01 09:01:41,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367678054] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:01:41,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938223770] [2023-04-01 09:01:41,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:01:41,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:01:41,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:01:41,951 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 09:01:41,952 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 09:01:42,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:01:42,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:01:42,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:01:42,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 09:01:42,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:01:42,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 09:01:42,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938223770] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:01:42,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [385795251] [2023-04-01 09:01:42,304 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 09:01:42,304 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:01:42,307 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:01:42,311 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:01:42,312 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:01:42,465 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-01 09:01:43,995 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 80 for LOIs [2023-04-01 09:01:44,029 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 81 for LOIs [2023-04-01 09:01:44,043 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:01:44,047 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:01:45,276 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '238#(and (exists ((|v_main_~#c~0.base_BEFORE_CALL_12| Int)) (and (not (= |#StackHeapBarrier| |v_main_~#c~0.base_BEFORE_CALL_12|)) (not (= (select (select |#memory_int| |v_main_~#c~0.base_BEFORE_CALL_12|) 4) 0)) (not (= |v_main_~#c~0.base_BEFORE_CALL_12| 0)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (exists ((|v_old(#memory_int)_BEFORE_CALL_12| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_12| (Array Int Int)) (|v_main_~#a~0.base_BEFORE_CALL_12| Int) (|v_old(#length)_BEFORE_CALL_12| (Array Int Int))) (and (= (select |v_old(#length)_BEFORE_CALL_12| 3) 12) (not (= |v_main_~#a~0.base_BEFORE_CALL_12| 2)) (= (select |v_old(#valid)_BEFORE_CALL_12| 3) 1) (not (= |v_main_~#a~0.base_BEFORE_CALL_12| |#StackHeapBarrier|)) (not (= |v_old(#valid)_BEFORE_CALL_12| (select |v_old(#memory_int)_BEFORE_CALL_12| 1))) (= (select |v_old(#valid)_BEFORE_CALL_12| 2) 1) (= (select |v_old(#length)_BEFORE_CALL_12| 1) 2) (= (select |v_old(#valid)_BEFORE_CALL_12| |v_main_~#a~0.base_BEFORE_CALL_12|) 0) (not (= |v_main_~#a~0.base_BEFORE_CALL_12| 3)) (not (= |v_old(#valid)_BEFORE_CALL_12| |v_old(#length)_BEFORE_CALL_12|)) (not (= |v_main_~#a~0.base_BEFORE_CALL_12| 0)) (= 0 (select (select |v_old(#memory_int)_BEFORE_CALL_12| 1) 1)) (not (= |v_old(#length)_BEFORE_CALL_12| (select |v_old(#memory_int)_BEFORE_CALL_12| 1))) (= (select |v_old(#valid)_BEFORE_CALL_12| 1) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_12| 1) 0) 48) (= (select |v_old(#length)_BEFORE_CALL_12| 2) 26) (= (select |v_old(#valid)_BEFORE_CALL_12| 0) 0) (not (= |v_main_~#a~0.base_BEFORE_CALL_12| 1)))) (= |#NULL.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2023-04-01 09:01:45,276 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:01:45,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 09:01:45,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-04-01 09:01:45,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985163465] [2023-04-01 09:01:45,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 09:01:45,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 09:01:45,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:01:45,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 09:01:45,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2023-04-01 09:01:45,280 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-01 09:01:45,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:01:45,388 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2023-04-01 09:01:45,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 09:01:45,388 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 18 [2023-04-01 09:01:45,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:01:45,389 INFO L225 Difference]: With dead ends: 52 [2023-04-01 09:01:45,389 INFO L226 Difference]: Without dead ends: 41 [2023-04-01 09:01:45,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2023-04-01 09:01:45,391 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 60 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:01:45,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 17 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:01:45,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-04-01 09:01:45,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2023-04-01 09:01:45,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 09:01:45,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2023-04-01 09:01:45,408 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 18 [2023-04-01 09:01:45,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:01:45,408 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2023-04-01 09:01:45,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-01 09:01:45,409 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2023-04-01 09:01:45,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 09:01:45,410 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:01:45,410 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:01:45,420 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 09:01:45,620 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 09:01:45,621 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:01:45,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:01:45,621 INFO L85 PathProgramCache]: Analyzing trace with hash -115370870, now seen corresponding path program 2 times [2023-04-01 09:01:45,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:01:45,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043137912] [2023-04-01 09:01:45,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:01:45,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:01:45,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:01:45,925 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 09:01:45,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:01:45,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043137912] [2023-04-01 09:01:45,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043137912] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:01:45,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506084898] [2023-04-01 09:01:45,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:01:45,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:01:45,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:01:45,929 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 09:01:45,952 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 09:01:46,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 09:01:46,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:01:46,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 09:01:46,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:01:46,120 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-04-01 09:01:46,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:01:46,205 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-04-01 09:01:46,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506084898] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:01:46,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [333633196] [2023-04-01 09:01:46,208 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 09:01:46,208 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:01:46,208 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:01:46,208 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:01:46,208 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:01:46,265 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-01 09:01:47,109 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 80 for LOIs [2023-04-01 09:01:47,139 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 81 for LOIs [2023-04-01 09:01:47,150 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:01:47,154 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:01:48,291 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '628#(and (exists ((|v_main_~#c~0.base_BEFORE_CALL_24| Int)) (and (not (= |v_main_~#c~0.base_BEFORE_CALL_24| 0)) (not (= (select (select |#memory_int| |v_main_~#c~0.base_BEFORE_CALL_24|) 4) 0)) (not (= |#StackHeapBarrier| |v_main_~#c~0.base_BEFORE_CALL_24|)))) (exists ((|v_old(#memory_int)_BEFORE_CALL_24| (Array Int (Array Int Int))) (|v_old(#length)_BEFORE_CALL_24| (Array Int Int)) (|v_old(#valid)_BEFORE_CALL_24| (Array Int Int)) (|v_main_~#a~0.base_BEFORE_CALL_24| Int)) (and (not (= |v_main_~#a~0.base_BEFORE_CALL_24| 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_24| 1) 1) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_24| 1) |v_old(#length)_BEFORE_CALL_24|)) (= (select |v_old(#valid)_BEFORE_CALL_24| 3) 1) (not (= |v_main_~#a~0.base_BEFORE_CALL_24| 1)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_24| 1) |v_old(#valid)_BEFORE_CALL_24|)) (not (= |v_main_~#a~0.base_BEFORE_CALL_24| 3)) (= (select |v_old(#valid)_BEFORE_CALL_24| 1) 1) (= (select |v_old(#length)_BEFORE_CALL_24| 2) 26) (= (select |v_old(#length)_BEFORE_CALL_24| 3) 12) (= (select |v_old(#valid)_BEFORE_CALL_24| |v_main_~#a~0.base_BEFORE_CALL_24|) 0) (not (= |v_main_~#a~0.base_BEFORE_CALL_24| |#StackHeapBarrier|)) (not (= |v_main_~#a~0.base_BEFORE_CALL_24| 0)) (not (= |v_old(#valid)_BEFORE_CALL_24| |v_old(#length)_BEFORE_CALL_24|)) (= (select |v_old(#valid)_BEFORE_CALL_24| 2) 1) (= 2 (select |v_old(#length)_BEFORE_CALL_24| 1)) (= (select |v_old(#valid)_BEFORE_CALL_24| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_24| 1) 0) 48))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2023-04-01 09:01:48,291 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:01:48,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 09:01:48,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-04-01 09:01:48,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490696749] [2023-04-01 09:01:48,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 09:01:48,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 09:01:48,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:01:48,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 09:01:48,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=816, Unknown=1, NotChecked=0, Total=1056 [2023-04-01 09:01:48,294 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 8 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 09:01:48,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:01:48,552 INFO L93 Difference]: Finished difference Result 97 states and 129 transitions. [2023-04-01 09:01:48,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 09:01:48,553 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 8 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 36 [2023-04-01 09:01:48,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:01:48,557 INFO L225 Difference]: With dead ends: 97 [2023-04-01 09:01:48,557 INFO L226 Difference]: Without dead ends: 83 [2023-04-01 09:01:48,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=325, Invalid=1080, Unknown=1, NotChecked=0, Total=1406 [2023-04-01 09:01:48,561 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 61 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:01:48,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 36 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 09:01:48,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-04-01 09:01:48,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2023-04-01 09:01:48,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 09:01:48,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2023-04-01 09:01:48,573 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 36 [2023-04-01 09:01:48,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:01:48,573 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2023-04-01 09:01:48,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 8 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 09:01:48,574 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2023-04-01 09:01:48,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-01 09:01:48,576 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:01:48,576 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:01:48,588 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 09:01:48,782 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 09:01:48,782 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:01:48,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:01:48,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1334606998, now seen corresponding path program 3 times [2023-04-01 09:01:48,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:01:48,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656377623] [2023-04-01 09:01:48,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:01:48,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:01:48,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:01:49,151 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-04-01 09:01:49,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:01:49,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656377623] [2023-04-01 09:01:49,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656377623] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:01:49,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420724183] [2023-04-01 09:01:49,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 09:01:49,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:01:49,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:01:49,155 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 09:01:49,158 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 09:01:49,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 09:01:49,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:01:49,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 09:01:49,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:01:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-04-01 09:01:49,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:01:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-04-01 09:01:50,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420724183] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:01:50,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [722878596] [2023-04-01 09:01:50,231 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 09:01:50,231 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:01:50,232 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:01:50,232 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:01:50,232 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:01:50,269 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-01 09:01:51,018 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 80 for LOIs [2023-04-01 09:01:51,045 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 81 for LOIs [2023-04-01 09:01:51,058 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:01:51,061 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:01:52,085 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1378#(and (exists ((|v_old(#length)_BEFORE_CALL_36| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_36| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_36| (Array Int Int)) (|v_main_~#a~0.base_BEFORE_CALL_36| Int)) (and (not (= |v_main_~#a~0.base_BEFORE_CALL_36| 1)) (not (= |v_old(#valid)_BEFORE_CALL_36| (select |v_old(#memory_int)_BEFORE_CALL_36| 1))) (= (select |v_old(#valid)_BEFORE_CALL_36| |v_main_~#a~0.base_BEFORE_CALL_36|) 0) (not (= |v_main_~#a~0.base_BEFORE_CALL_36| 2)) (not (= |v_main_~#a~0.base_BEFORE_CALL_36| 3)) (not (= |v_main_~#a~0.base_BEFORE_CALL_36| |#StackHeapBarrier|)) (= (select |v_old(#valid)_BEFORE_CALL_36| 3) 1) (not (= |v_main_~#a~0.base_BEFORE_CALL_36| 0)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_36| 1) |v_old(#length)_BEFORE_CALL_36|)) (= (select |v_old(#valid)_BEFORE_CALL_36| 2) 1) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_36| 1) 0)) (not (= |v_old(#valid)_BEFORE_CALL_36| |v_old(#length)_BEFORE_CALL_36|)) (= (select |v_old(#valid)_BEFORE_CALL_36| 1) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_36| 1) 1) 0) (= (select |v_old(#length)_BEFORE_CALL_36| 2) 26) (= 2 (select |v_old(#length)_BEFORE_CALL_36| 1)) (= (select |v_old(#valid)_BEFORE_CALL_36| 0) 0) (= (select |v_old(#length)_BEFORE_CALL_36| 3) 12))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (exists ((|v_main_~#c~0.base_BEFORE_CALL_36| Int)) (and (not (= |v_main_~#c~0.base_BEFORE_CALL_36| 0)) (not (= |#StackHeapBarrier| |v_main_~#c~0.base_BEFORE_CALL_36|)) (not (= (select (select |#memory_int| |v_main_~#c~0.base_BEFORE_CALL_36|) 4) 0)))) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2023-04-01 09:01:52,086 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:01:52,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 09:01:52,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 37 [2023-04-01 09:01:52,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430651211] [2023-04-01 09:01:52,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 09:01:52,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-04-01 09:01:52,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:01:52,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-04-01 09:01:52,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=1842, Unknown=1, NotChecked=0, Total=2550 [2023-04-01 09:01:52,091 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 37 states have internal predecessors, (76), 34 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (32), 32 states have call predecessors, (32), 31 states have call successors, (32) [2023-04-01 09:01:52,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:01:52,767 INFO L93 Difference]: Finished difference Result 187 states and 255 transitions. [2023-04-01 09:01:52,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 09:01:52,769 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 37 states have internal predecessors, (76), 34 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (32), 32 states have call predecessors, (32), 31 states have call successors, (32) Word has length 72 [2023-04-01 09:01:52,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:01:52,774 INFO L225 Difference]: With dead ends: 187 [2023-04-01 09:01:52,775 INFO L226 Difference]: Without dead ends: 167 [2023-04-01 09:01:52,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1027, Invalid=2754, Unknown=1, NotChecked=0, Total=3782 [2023-04-01 09:01:52,782 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 263 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 09:01:52,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 23 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 09:01:52,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-04-01 09:01:52,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 106. [2023-04-01 09:01:52,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 25 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-04-01 09:01:52,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 129 transitions. [2023-04-01 09:01:52,814 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 129 transitions. Word has length 72 [2023-04-01 09:01:52,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:01:52,816 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 129 transitions. [2023-04-01 09:01:52,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 37 states have internal predecessors, (76), 34 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (32), 32 states have call predecessors, (32), 31 states have call successors, (32) [2023-04-01 09:01:52,817 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 129 transitions. [2023-04-01 09:01:52,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-04-01 09:01:52,825 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:01:52,825 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:01:52,836 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 09:01:53,034 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 09:01:53,034 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:01:53,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:01:53,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1456396586, now seen corresponding path program 4 times [2023-04-01 09:01:53,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:01:53,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467903025] [2023-04-01 09:01:53,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:01:53,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:01:53,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:01:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-04-01 09:01:54,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:01:54,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467903025] [2023-04-01 09:01:54,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467903025] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:01:54,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498942992] [2023-04-01 09:01:54,044 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 09:01:54,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:01:54,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:01:54,048 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 09:01:54,059 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 09:01:54,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:01:54,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 09:01:54,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:01:54,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-04-01 09:01:54,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:01:55,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-04-01 09:01:55,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498942992] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:01:55,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1969796483] [2023-04-01 09:01:55,569 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 09:01:55,569 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:01:55,570 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:01:55,570 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:01:55,570 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:01:55,601 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-01 09:01:56,352 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 80 for LOIs [2023-04-01 09:01:56,389 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 81 for LOIs [2023-04-01 09:01:56,401 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:01:56,404 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:01:57,586 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2848#(and (exists ((|v_main_~#c~0.base_BEFORE_CALL_48| Int)) (and (not (= (select (select |#memory_int| |v_main_~#c~0.base_BEFORE_CALL_48|) 4) 0)) (not (= |#StackHeapBarrier| |v_main_~#c~0.base_BEFORE_CALL_48|)) (not (= |v_main_~#c~0.base_BEFORE_CALL_48| 0)))) (exists ((|v_old(#length)_BEFORE_CALL_48| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_48| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_48| (Array Int Int)) (|v_main_~#a~0.base_BEFORE_CALL_48| Int)) (and (= (select |v_old(#valid)_BEFORE_CALL_48| 3) 1) (not (= |v_old(#valid)_BEFORE_CALL_48| |v_old(#length)_BEFORE_CALL_48|)) (= (select |v_old(#valid)_BEFORE_CALL_48| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_48| |v_main_~#a~0.base_BEFORE_CALL_48|) 0) (not (= |v_old(#valid)_BEFORE_CALL_48| (select |v_old(#memory_int)_BEFORE_CALL_48| 1))) (not (= |v_main_~#a~0.base_BEFORE_CALL_48| 3)) (= 26 (select |v_old(#length)_BEFORE_CALL_48| 2)) (= (select |v_old(#length)_BEFORE_CALL_48| 3) 12) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_48| 1) 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_48| 1) 1) 0) (not (= |v_main_~#a~0.base_BEFORE_CALL_48| 0)) (= (select |v_old(#valid)_BEFORE_CALL_48| 1) 1) (not (= |v_main_~#a~0.base_BEFORE_CALL_48| |#StackHeapBarrier|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_48| 1) |v_old(#length)_BEFORE_CALL_48|)) (= 2 (select |v_old(#length)_BEFORE_CALL_48| 1)) (not (= |v_main_~#a~0.base_BEFORE_CALL_48| 1)) (= (select |v_old(#valid)_BEFORE_CALL_48| 0) 0) (not (= |v_main_~#a~0.base_BEFORE_CALL_48| 2)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2023-04-01 09:01:57,586 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:01:57,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 09:01:57,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 73 [2023-04-01 09:01:57,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740024019] [2023-04-01 09:01:57,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 09:01:57,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-04-01 09:01:57,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:01:57,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-04-01 09:01:57,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2507, Invalid=4973, Unknown=2, NotChecked=0, Total=7482 [2023-04-01 09:01:57,593 INFO L87 Difference]: Start difference. First operand 106 states and 129 transitions. Second operand has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 73 states have internal predecessors, (148), 70 states have call successors, (70), 4 states have call predecessors, (70), 3 states have return successors, (68), 68 states have call predecessors, (68), 67 states have call successors, (68) [2023-04-01 09:01:59,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:01:59,470 INFO L93 Difference]: Finished difference Result 367 states and 507 transitions. [2023-04-01 09:01:59,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-04-01 09:01:59,471 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 73 states have internal predecessors, (148), 70 states have call successors, (70), 4 states have call predecessors, (70), 3 states have return successors, (68), 68 states have call predecessors, (68), 67 states have call successors, (68) Word has length 144 [2023-04-01 09:01:59,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:01:59,473 INFO L225 Difference]: With dead ends: 367 [2023-04-01 09:01:59,473 INFO L226 Difference]: Without dead ends: 335 [2023-04-01 09:01:59,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5107 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3727, Invalid=8261, Unknown=2, NotChecked=0, Total=11990 [2023-04-01 09:01:59,478 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 325 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 529 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 529 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 09:01:59,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 54 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [529 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 09:01:59,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2023-04-01 09:01:59,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 202. [2023-04-01 09:01:59,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 149 states have (on average 1.0201342281879195) internal successors, (152), 149 states have internal predecessors, (152), 49 states have call successors, (49), 4 states have call predecessors, (49), 3 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2023-04-01 09:01:59,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 249 transitions. [2023-04-01 09:01:59,508 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 249 transitions. Word has length 144 [2023-04-01 09:01:59,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:01:59,509 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 249 transitions. [2023-04-01 09:01:59,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 73 states have internal predecessors, (148), 70 states have call successors, (70), 4 states have call predecessors, (70), 3 states have return successors, (68), 68 states have call predecessors, (68), 67 states have call successors, (68) [2023-04-01 09:01:59,509 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 249 transitions. [2023-04-01 09:01:59,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2023-04-01 09:01:59,512 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:01:59,512 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:01:59,523 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 09:01:59,719 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 09:01:59,719 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:01:59,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:01:59,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1303078058, now seen corresponding path program 5 times [2023-04-01 09:01:59,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:01:59,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152478032] [2023-04-01 09:01:59,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:01:59,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:01:59,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:02:03,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6302 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2023-04-01 09:02:03,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:02:03,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152478032] [2023-04-01 09:02:03,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152478032] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:02:03,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857877244] [2023-04-01 09:02:03,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:02:03,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:02:03,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:02:03,070 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 09:02:03,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process