/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-examples/standard_strcpy_original-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 14:15:35,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 14:15:35,436 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 14:15:35,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 14:15:35,463 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 14:15:35,464 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 14:15:35,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 14:15:35,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 14:15:35,473 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 14:15:35,476 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 14:15:35,478 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 14:15:35,479 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 14:15:35,479 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 14:15:35,482 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 14:15:35,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 14:15:35,484 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 14:15:35,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 14:15:35,485 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 14:15:35,486 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 14:15:35,489 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 14:15:35,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 14:15:35,491 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 14:15:35,492 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 14:15:35,493 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 14:15:35,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 14:15:35,499 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 14:15:35,499 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 14:15:35,500 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 14:15:35,500 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 14:15:35,501 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 14:15:35,501 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 14:15:35,501 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 14:15:35,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 14:15:35,503 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 14:15:35,503 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 14:15:35,503 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 14:15:35,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 14:15:35,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 14:15:35,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 14:15:35,504 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 14:15:35,505 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 14:15:35,506 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 14:15:35,532 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 14:15:35,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 14:15:35,533 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 14:15:35,533 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 14:15:35,534 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 14:15:35,534 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 14:15:35,534 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 14:15:35,534 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 14:15:35,534 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 14:15:35,534 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 14:15:35,535 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 14:15:35,535 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 14:15:35,535 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 14:15:35,535 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 14:15:35,535 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 14:15:35,535 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 14:15:35,535 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 14:15:35,535 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 14:15:35,536 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 14:15:35,536 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 14:15:35,536 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 14:15:35,536 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 14:15:35,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 14:15:35,536 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 14:15:35,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 14:15:35,536 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 14:15:35,536 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 14:15:35,536 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 14:15:35,537 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 14:15:35,537 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 14:15:35,537 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 14:15:35,537 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 14:15:35,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:15:35,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 14:15:35,537 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 14:15:35,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 14:15:35,537 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 14:15:35,537 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 14:15:35,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 14:15:35,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 14:15:35,538 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 14:15:35,538 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 14:15:35,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 14:15:35,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 14:15:35,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 14:15:35,730 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 14:15:35,730 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 14:15:35,731 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_strcpy_original-2.i [2023-04-02 14:15:36,809 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 14:15:36,968 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 14:15:36,968 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_original-2.i [2023-04-02 14:15:36,974 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e3dc646a/729dbabc052f493aaafac5f927b347af/FLAGc7b35cd3a [2023-04-02 14:15:36,993 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e3dc646a/729dbabc052f493aaafac5f927b347af [2023-04-02 14:15:36,995 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 14:15:36,996 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 14:15:36,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 14:15:36,999 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 14:15:37,001 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 14:15:37,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:15:36" (1/1) ... [2023-04-02 14:15:37,003 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25dc2bc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:15:37, skipping insertion in model container [2023-04-02 14:15:37,003 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:15:36" (1/1) ... [2023-04-02 14:15:37,008 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 14:15:37,019 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 14:15:37,120 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-examples/standard_strcpy_original-2.i[896,909] [2023-04-02 14:15:37,135 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:15:37,142 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 14:15:37,150 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-examples/standard_strcpy_original-2.i[896,909] [2023-04-02 14:15:37,156 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:15:37,166 INFO L208 MainTranslator]: Completed translation [2023-04-02 14:15:37,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:15:37 WrapperNode [2023-04-02 14:15:37,166 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 14:15:37,167 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 14:15:37,167 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 14:15:37,167 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 14:15:37,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:15:37" (1/1) ... [2023-04-02 14:15:37,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:15:37" (1/1) ... [2023-04-02 14:15:37,179 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:15:37" (1/1) ... [2023-04-02 14:15:37,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:15:37" (1/1) ... [2023-04-02 14:15:37,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:15:37" (1/1) ... [2023-04-02 14:15:37,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:15:37" (1/1) ... [2023-04-02 14:15:37,187 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:15:37" (1/1) ... [2023-04-02 14:15:37,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:15:37" (1/1) ... [2023-04-02 14:15:37,189 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 14:15:37,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 14:15:37,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 14:15:37,190 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 14:15:37,191 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:15:37" (1/1) ... [2023-04-02 14:15:37,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:15:37,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:15:37,217 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 14:15:37,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 14:15:37,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 14:15:37,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 14:15:37,250 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 14:15:37,253 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 14:15:37,254 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 14:15:37,254 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 14:15:37,254 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 14:15:37,254 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 14:15:37,254 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 14:15:37,254 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 14:15:37,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 14:15:37,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 14:15:37,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 14:15:37,254 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 14:15:37,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 14:15:37,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 14:15:37,255 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 14:15:37,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 14:15:37,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 14:15:37,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 14:15:37,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 14:15:37,344 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 14:15:37,346 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 14:15:37,520 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 14:15:37,544 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 14:15:37,544 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-02 14:15:37,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:15:37 BoogieIcfgContainer [2023-04-02 14:15:37,546 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 14:15:37,547 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 14:15:37,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 14:15:37,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 14:15:37,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:15:36" (1/3) ... [2023-04-02 14:15:37,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27d50591 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:15:37, skipping insertion in model container [2023-04-02 14:15:37,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:15:37" (2/3) ... [2023-04-02 14:15:37,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27d50591 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:15:37, skipping insertion in model container [2023-04-02 14:15:37,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:15:37" (3/3) ... [2023-04-02 14:15:37,552 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_strcpy_original-2.i [2023-04-02 14:15:37,579 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 14:15:37,579 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 14:15:37,611 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 14:15:37,616 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;@28f74ccd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 14:15:37,616 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 14:15:37,619 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:15:37,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 14:15:37,624 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:15:37,625 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:15:37,625 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:15:37,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:15:37,629 INFO L85 PathProgramCache]: Analyzing trace with hash -114091219, now seen corresponding path program 1 times [2023-04-02 14:15:37,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:15:37,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056864189] [2023-04-02 14:15:37,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:15:37,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:15:37,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:15:37,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:15:37,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:15:37,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056864189] [2023-04-02 14:15:37,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056864189] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:15:37,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:15:37,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 14:15:37,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807514052] [2023-04-02 14:15:37,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:15:37,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 14:15:37,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:15:37,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 14:15:37,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 14:15:37,832 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 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 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:15:37,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:15:37,859 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2023-04-02 14:15:37,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 14:15:37,861 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 14 [2023-04-02 14:15:37,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:15:37,864 INFO L225 Difference]: With dead ends: 38 [2023-04-02 14:15:37,865 INFO L226 Difference]: Without dead ends: 19 [2023-04-02 14:15:37,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 14:15:37,869 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:15:37,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:15:37,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-04-02 14:15:37,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-04-02 14:15:37,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:15:37,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-04-02 14:15:37,895 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2023-04-02 14:15:37,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:15:37,896 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-04-02 14:15:37,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:15:37,896 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-04-02 14:15:37,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 14:15:37,896 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:15:37,896 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:15:37,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 14:15:37,897 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:15:37,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:15:37,897 INFO L85 PathProgramCache]: Analyzing trace with hash -991393704, now seen corresponding path program 1 times [2023-04-02 14:15:37,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:15:37,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402195932] [2023-04-02 14:15:37,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:15:37,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:15:37,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:15:37,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:15:37,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:15:37,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402195932] [2023-04-02 14:15:37,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402195932] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:15:37,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:15:37,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 14:15:37,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477299192] [2023-04-02 14:15:37,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:15:37,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 14:15:37,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:15:37,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 14:15:37,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:15:37,988 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:15:38,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:15:38,001 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2023-04-02 14:15:38,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 14:15:38,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-04-02 14:15:38,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:15:38,006 INFO L225 Difference]: With dead ends: 33 [2023-04-02 14:15:38,006 INFO L226 Difference]: Without dead ends: 20 [2023-04-02 14:15:38,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:15:38,008 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:15:38,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:15:38,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-02 14:15:38,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-04-02 14:15:38,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:15:38,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-04-02 14:15:38,014 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2023-04-02 14:15:38,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:15:38,015 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-04-02 14:15:38,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:15:38,015 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-04-02 14:15:38,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-02 14:15:38,015 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:15:38,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:15:38,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 14:15:38,016 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:15:38,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:15:38,017 INFO L85 PathProgramCache]: Analyzing trace with hash -722884760, now seen corresponding path program 1 times [2023-04-02 14:15:38,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:15:38,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052143793] [2023-04-02 14:15:38,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:15:38,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:15:38,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:15:38,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:15:38,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:15:38,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052143793] [2023-04-02 14:15:38,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052143793] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:15:38,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061512928] [2023-04-02 14:15:38,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:15:38,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:15:38,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:15:38,111 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:15:38,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 14:15:38,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:15:38,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 14:15:38,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:15:38,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:15:38,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:15:38,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:15:38,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061512928] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:15:38,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1697242763] [2023-04-02 14:15:38,237 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-02 14:15:38,237 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:15:38,239 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:15:38,242 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:15:38,243 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:15:38,294 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:15:38,454 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:15:38,463 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:15:38,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1697242763] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:15:38,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:15:38,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [4, 4, 4] total 16 [2023-04-02 14:15:38,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935488036] [2023-04-02 14:15:38,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:15:38,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 14:15:38,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:15:38,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 14:15:38,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-04-02 14:15:38,857 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 11 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 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) [2023-04-02 14:15:39,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:15:39,496 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2023-04-02 14:15:39,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 14:15:39,497 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 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 16 [2023-04-02 14:15:39,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:15:39,498 INFO L225 Difference]: With dead ends: 48 [2023-04-02 14:15:39,498 INFO L226 Difference]: Without dead ends: 35 [2023-04-02 14:15:39,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2023-04-02 14:15:39,499 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 74 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:15:39,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 4 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:15:39,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-02 14:15:39,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2023-04-02 14:15:39,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:15:39,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-04-02 14:15:39,505 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 16 [2023-04-02 14:15:39,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:15:39,506 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-04-02 14:15:39,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 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) [2023-04-02 14:15:39,506 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-04-02 14:15:39,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 14:15:39,506 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:15:39,507 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:15:39,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 14:15:39,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:15:39,720 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:15:39,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:15:39,721 INFO L85 PathProgramCache]: Analyzing trace with hash -953663715, now seen corresponding path program 1 times [2023-04-02 14:15:39,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:15:39,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372919366] [2023-04-02 14:15:39,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:15:39,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:15:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:15:39,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 14:15:39,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:15:39,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372919366] [2023-04-02 14:15:39,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372919366] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:15:39,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068151801] [2023-04-02 14:15:39,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:15:39,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:15:39,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:15:39,813 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:15:39,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 14:15:39,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:15:39,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 14:15:39,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:15:39,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 14:15:39,884 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:15:39,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 14:15:39,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068151801] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:15:39,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1053489273] [2023-04-02 14:15:39,907 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-02 14:15:39,907 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:15:39,907 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:15:39,908 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:15:39,908 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:15:39,935 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:15:40,166 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 42 for LOIs [2023-04-02 14:15:40,187 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:15:40,189 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:15:40,646 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '527#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#src~0.base_BEFORE_CALL_1| Int) (|v_main_~#dst~0.base_BEFORE_CALL_1| Int)) (and (not (= (select (select |#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_1|) 0) (select (select |#memory_int| |v_main_~#src~0.base_BEFORE_CALL_1|) 0))) (<= 2 |v_main_~#src~0.base_BEFORE_CALL_1|) (<= 2 |v_main_~#dst~0.base_BEFORE_CALL_1|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#dst~0.base_BEFORE_CALL_1|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#dst~0.base_BEFORE_CALL_1|) (not (= (select (select |#memory_int| |v_main_~#src~0.base_BEFORE_CALL_1|) 0) 0)) (<= 3 (+ |v_main_~#src~0.base_BEFORE_CALL_1| |#StackHeapBarrier|)) (<= 4 (+ |v_main_~#src~0.base_BEFORE_CALL_1| |v_main_~#dst~0.base_BEFORE_CALL_1|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#src~0.base_BEFORE_CALL_1|))) (= |#NULL.base| 0))' at error location [2023-04-02 14:15:40,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:15:40,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:15:40,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 14:15:40,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809910747] [2023-04-02 14:15:40,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:15:40,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 14:15:40,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:15:40,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 14:15:40,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2023-04-02 14:15:40,647 INFO L87 Difference]: Start difference. First operand 22 states and 24 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) [2023-04-02 14:15:40,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:15:40,673 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2023-04-02 14:15:40,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 14:15:40,676 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 18 [2023-04-02 14:15:40,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:15:40,677 INFO L225 Difference]: With dead ends: 40 [2023-04-02 14:15:40,677 INFO L226 Difference]: Without dead ends: 25 [2023-04-02 14:15:40,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2023-04-02 14:15:40,678 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:15:40,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:15:40,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-02 14:15:40,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-04-02 14:15:40,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 14:15:40,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2023-04-02 14:15:40,683 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 18 [2023-04-02 14:15:40,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:15:40,683 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2023-04-02 14:15:40,683 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) [2023-04-02 14:15:40,683 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2023-04-02 14:15:40,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 14:15:40,684 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:15:40,684 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:15:40,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 14:15:40,888 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,SelfDestructingSolverStorable3 [2023-04-02 14:15:40,889 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:15:40,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:15:40,889 INFO L85 PathProgramCache]: Analyzing trace with hash -519510003, now seen corresponding path program 2 times [2023-04-02 14:15:40,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:15:40,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937436235] [2023-04-02 14:15:40,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:15:40,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:15:40,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:15:40,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 14:15:40,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:15:40,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937436235] [2023-04-02 14:15:40,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937436235] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:15:40,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974327383] [2023-04-02 14:15:40,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:15:40,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:15:40,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:15:40,979 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:15:40,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 14:15:41,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 14:15:41,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:15:41,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-02 14:15:41,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:15:41,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-02 14:15:41,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2023-04-02 14:15:41,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2023-04-02 14:15:41,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:15:41,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:15:41,242 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 14:15:41,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2023-04-02 14:15:41,265 INFO L321 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2023-04-02 14:15:41,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 72 [2023-04-02 14:15:41,295 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-02 14:15:41,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 16 [2023-04-02 14:15:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:15:41,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974327383] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:15:41,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [638346183] [2023-04-02 14:15:41,354 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-02 14:15:41,354 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:15:41,354 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:15:41,354 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:15:41,354 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:15:41,372 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:15:41,543 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 42 for LOIs [2023-04-02 14:15:41,558 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:15:41,560 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:15:42,175 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '778#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#dst~0.base_BEFORE_CALL_2| Int) (|v_main_~#src~0.base_BEFORE_CALL_2| Int)) (and (<= 3 (+ |#StackHeapBarrier| |v_main_~#dst~0.base_BEFORE_CALL_2|)) (<= 2 |v_main_~#dst~0.base_BEFORE_CALL_2|) (<= 4 (+ |v_main_~#src~0.base_BEFORE_CALL_2| |v_main_~#dst~0.base_BEFORE_CALL_2|)) (not (= (select (select |#memory_int| |v_main_~#src~0.base_BEFORE_CALL_2|) 0) (select (select |#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_2|) 0))) (<= 2 |v_main_~#src~0.base_BEFORE_CALL_2|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#src~0.base_BEFORE_CALL_2|) (<= 3 (+ |v_main_~#src~0.base_BEFORE_CALL_2| |#StackHeapBarrier|)) (not (= (select (select |#memory_int| |v_main_~#src~0.base_BEFORE_CALL_2|) 0) 0)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#dst~0.base_BEFORE_CALL_2|))) (= |#NULL.base| 0))' at error location [2023-04-02 14:15:42,175 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:15:42,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:15:42,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2023-04-02 14:15:42,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313413634] [2023-04-02 14:15:42,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:15:42,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-02 14:15:42,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:15:42,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-02 14:15:42,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2023-04-02 14:15:42,177 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:15:42,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:15:42,378 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2023-04-02 14:15:42,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 14:15:42,378 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-04-02 14:15:42,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:15:42,379 INFO L225 Difference]: With dead ends: 49 [2023-04-02 14:15:42,379 INFO L226 Difference]: Without dead ends: 34 [2023-04-02 14:15:42,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 14:15:42,380 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:15:42,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 106 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:15:42,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-02 14:15:42,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2023-04-02 14:15:42,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:15:42,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2023-04-02 14:15:42,387 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 21 [2023-04-02 14:15:42,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:15:42,387 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2023-04-02 14:15:42,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:15:42,387 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2023-04-02 14:15:42,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-02 14:15:42,388 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:15:42,388 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:15:42,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 14:15:42,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:15:42,593 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:15:42,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:15:42,593 INFO L85 PathProgramCache]: Analyzing trace with hash 2000737305, now seen corresponding path program 1 times [2023-04-02 14:15:42,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:15:42,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375045234] [2023-04-02 14:15:42,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:15:42,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:15:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:15:42,692 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-02 14:15:42,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:15:42,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375045234] [2023-04-02 14:15:42,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375045234] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:15:42,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025480621] [2023-04-02 14:15:42,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:15:42,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:15:42,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:15:42,693 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:15:42,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 14:15:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:15:42,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 14:15:42,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:15:42,756 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 14:15:42,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:15:42,808 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-02 14:15:42,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025480621] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:15:42,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [284598936] [2023-04-02 14:15:42,812 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:15:42,812 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:15:42,813 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:15:42,814 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:15:42,814 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:15:42,826 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:15:43,143 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2023-04-02 14:15:43,165 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:15:43,168 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:15:43,744 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1119#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~i~0_BEFORE_CALL_9 Int) (|v_main_~#src~0.base_BEFORE_CALL_9| Int) (|v_main_~#dst~0.base_BEFORE_CALL_9| Int)) (and (<= 3 (+ |v_main_~#src~0.base_BEFORE_CALL_9| |#StackHeapBarrier|)) (<= 1 (+ v_main_~i~0_BEFORE_CALL_9 |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#dst~0.base_BEFORE_CALL_9|) (<= 2 (+ v_main_~i~0_BEFORE_CALL_9 |v_main_~#dst~0.base_BEFORE_CALL_9|)) (<= 0 v_main_~i~0_BEFORE_CALL_9) (<= 2 (+ v_main_~i~0_BEFORE_CALL_9 |v_main_~#src~0.base_BEFORE_CALL_9|)) (not (= (select (select |#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_9|) (* v_main_~i~0_BEFORE_CALL_9 4)) (select (select |#memory_int| |v_main_~#src~0.base_BEFORE_CALL_9|) (* v_main_~i~0_BEFORE_CALL_9 4)))) (<= 4 (+ |v_main_~#src~0.base_BEFORE_CALL_9| |v_main_~#dst~0.base_BEFORE_CALL_9|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#src~0.base_BEFORE_CALL_9|) (<= 2 |v_main_~#src~0.base_BEFORE_CALL_9|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#dst~0.base_BEFORE_CALL_9|)) (<= 2 |v_main_~#dst~0.base_BEFORE_CALL_9|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:15:43,744 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:15:43,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:15:43,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-04-02 14:15:43,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561103969] [2023-04-02 14:15:43,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:15:43,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-02 14:15:43,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:15:43,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-02 14:15:43,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2023-04-02 14:15:43,746 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 14:15:43,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:15:43,769 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2023-04-02 14:15:43,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 14:15:43,773 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-04-02 14:15:43,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:15:43,774 INFO L225 Difference]: With dead ends: 62 [2023-04-02 14:15:43,774 INFO L226 Difference]: Without dead ends: 40 [2023-04-02 14:15:43,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2023-04-02 14:15:43,775 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:15:43,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:15:43,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-02 14:15:43,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-04-02 14:15:43,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.09375) internal successors, (35), 33 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:15:43,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2023-04-02 14:15:43,784 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 30 [2023-04-02 14:15:43,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:15:43,784 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2023-04-02 14:15:43,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 14:15:43,784 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2023-04-02 14:15:43,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-02 14:15:43,784 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:15:43,785 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:15:43,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 14:15:43,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:15:43,990 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:15:43,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:15:43,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1186342647, now seen corresponding path program 2 times [2023-04-02 14:15:43,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:15:43,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381640554] [2023-04-02 14:15:43,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:15:43,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:15:44,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:15:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 2 proven. 78 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-02 14:15:44,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:15:44,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381640554] [2023-04-02 14:15:44,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381640554] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:15:44,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297330432] [2023-04-02 14:15:44,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:15:44,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:15:44,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:15:44,206 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:15:44,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 14:15:44,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 14:15:44,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:15:44,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-02 14:15:44,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:15:44,451 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-04-02 14:15:44,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:15:44,531 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-02 14:15:44,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 25 [2023-04-02 14:15:44,579 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-04-02 14:15:44,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297330432] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:15:44,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1308333949] [2023-04-02 14:15:44,581 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:15:44,581 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:15:44,581 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:15:44,581 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:15:44,581 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:15:44,592 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:15:44,851 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2023-04-02 14:15:44,872 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:15:44,874 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:15:45,695 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1539#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#src~0.base_BEFORE_CALL_18| Int) (v_main_~i~0_BEFORE_CALL_18 Int) (|v_main_~#dst~0.base_BEFORE_CALL_16| Int)) (and (<= 1 (+ v_main_~i~0_BEFORE_CALL_18 |#StackHeapBarrier|)) (<= 2 |v_main_~#dst~0.base_BEFORE_CALL_16|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#src~0.base_BEFORE_CALL_18|) (<= 3 (+ |v_main_~#dst~0.base_BEFORE_CALL_16| |#StackHeapBarrier|)) (<= 2 |v_main_~#src~0.base_BEFORE_CALL_18|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#dst~0.base_BEFORE_CALL_16|) (not (= (select (select |#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_16|) (* v_main_~i~0_BEFORE_CALL_18 4)) (select (select |#memory_int| |v_main_~#src~0.base_BEFORE_CALL_18|) (* v_main_~i~0_BEFORE_CALL_18 4)))) (<= 0 v_main_~i~0_BEFORE_CALL_18) (<= 3 (+ |v_main_~#src~0.base_BEFORE_CALL_18| |#StackHeapBarrier|)) (<= 2 (+ v_main_~i~0_BEFORE_CALL_18 |v_main_~#dst~0.base_BEFORE_CALL_16|)) (<= 2 (+ |v_main_~#src~0.base_BEFORE_CALL_18| v_main_~i~0_BEFORE_CALL_18)) (<= 4 (+ |v_main_~#src~0.base_BEFORE_CALL_18| |v_main_~#dst~0.base_BEFORE_CALL_16|)))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:15:45,696 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:15:45,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:15:45,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 9] total 29 [2023-04-02 14:15:45,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000000140] [2023-04-02 14:15:45,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:15:45,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-02 14:15:45,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:15:45,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-02 14:15:45,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2023-04-02 14:15:45,698 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:15:46,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:15:46,058 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2023-04-02 14:15:46,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 14:15:46,059 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 37 [2023-04-02 14:15:46,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:15:46,060 INFO L225 Difference]: With dead ends: 81 [2023-04-02 14:15:46,060 INFO L226 Difference]: Without dead ends: 48 [2023-04-02 14:15:46,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 78 SyntacticMatches, 8 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=435, Invalid=2645, Unknown=0, NotChecked=0, Total=3080 [2023-04-02 14:15:46,062 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:15:46,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 201 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:15:46,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-04-02 14:15:46,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2023-04-02 14:15:46,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 36 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:15:46,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2023-04-02 14:15:46,071 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 37 [2023-04-02 14:15:46,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:15:46,071 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2023-04-02 14:15:46,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:15:46,071 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2023-04-02 14:15:46,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-02 14:15:46,072 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:15:46,072 INFO L195 NwaCegarLoop]: trace histogram [13, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:15:46,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 14:15:46,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:15:46,285 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:15:46,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:15:46,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1740014990, now seen corresponding path program 3 times [2023-04-02 14:15:46,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:15:46,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556750507] [2023-04-02 14:15:46,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:15:46,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:15:46,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:15:46,488 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 2 proven. 91 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-02 14:15:46,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:15:46,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556750507] [2023-04-02 14:15:46,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556750507] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:15:46,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314224071] [2023-04-02 14:15:46,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:15:46,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:15:46,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:15:46,490 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:15:46,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 14:15:46,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:15:46,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:15:46,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-02 14:15:46,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:15:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 14:15:46,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:15:46,800 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 2 proven. 91 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-02 14:15:46,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314224071] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:15:46,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [180108381] [2023-04-02 14:15:46,801 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:15:46,801 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:15:46,802 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:15:46,802 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:15:46,802 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:15:46,811 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:15:47,052 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2023-04-02 14:15:47,074 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:15:47,075 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:15:47,738 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2041#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#dst~0.base_BEFORE_CALL_23| Int) (|v_main_~#src~0.base_BEFORE_CALL_25| Int) (v_main_~i~0_BEFORE_CALL_25 Int)) (and (<= 2 |v_main_~#dst~0.base_BEFORE_CALL_23|) (<= 0 v_main_~i~0_BEFORE_CALL_25) (<= 2 (+ |v_main_~#src~0.base_BEFORE_CALL_25| v_main_~i~0_BEFORE_CALL_25)) (<= 4 (+ |v_main_~#src~0.base_BEFORE_CALL_25| |v_main_~#dst~0.base_BEFORE_CALL_23|)) (<= 3 (+ |v_main_~#src~0.base_BEFORE_CALL_25| |#StackHeapBarrier|)) (not (= (select (select |#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_23|) (* v_main_~i~0_BEFORE_CALL_25 4)) (select (select |#memory_int| |v_main_~#src~0.base_BEFORE_CALL_25|) (* v_main_~i~0_BEFORE_CALL_25 4)))) (<= 2 (+ v_main_~i~0_BEFORE_CALL_25 |v_main_~#dst~0.base_BEFORE_CALL_23|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#dst~0.base_BEFORE_CALL_23|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#src~0.base_BEFORE_CALL_25|) (<= 2 |v_main_~#src~0.base_BEFORE_CALL_25|) (<= 3 (+ |v_main_~#dst~0.base_BEFORE_CALL_23| |#StackHeapBarrier|)) (<= 1 (+ v_main_~i~0_BEFORE_CALL_25 |#StackHeapBarrier|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:15:47,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:15:47,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:15:47,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2023-04-02 14:15:47,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889232404] [2023-04-02 14:15:47,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:15:47,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-04-02 14:15:47,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:15:47,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-04-02 14:15:47,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2023-04-02 14:15:47,741 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 14:15:47,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:15:47,793 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2023-04-02 14:15:47,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-04-02 14:15:47,794 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2023-04-02 14:15:47,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:15:47,795 INFO L225 Difference]: With dead ends: 82 [2023-04-02 14:15:47,795 INFO L226 Difference]: Without dead ends: 58 [2023-04-02 14:15:47,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2023-04-02 14:15:47,796 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:15:47,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:15:47,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-04-02 14:15:47,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-04-02 14:15:47,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 50 states have (on average 1.06) internal successors, (53), 51 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:15:47,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2023-04-02 14:15:47,806 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 40 [2023-04-02 14:15:47,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:15:47,806 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2023-04-02 14:15:47,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 14:15:47,807 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2023-04-02 14:15:47,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-02 14:15:47,807 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:15:47,807 INFO L195 NwaCegarLoop]: trace histogram [28, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:15:47,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-02 14:15:48,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:15:48,013 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:15:48,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:15:48,013 INFO L85 PathProgramCache]: Analyzing trace with hash 268347006, now seen corresponding path program 4 times [2023-04-02 14:15:48,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:15:48,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302598988] [2023-04-02 14:15:48,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:15:48,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:15:48,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:15:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 2 proven. 406 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-02 14:15:48,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:15:48,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302598988] [2023-04-02 14:15:48,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302598988] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:15:48,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251617416] [2023-04-02 14:15:48,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:15:48,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:15:48,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:15:48,621 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:15:48,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 14:15:48,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:15:48,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 30 conjunts are in the unsatisfiable core [2023-04-02 14:15:48,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:15:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 14:15:48,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:15:49,588 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 2 proven. 406 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-02 14:15:49,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251617416] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:15:49,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [685596192] [2023-04-02 14:15:49,590 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:15:49,590 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:15:49,590 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:15:49,590 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:15:49,590 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:15:49,600 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:15:49,832 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2023-04-02 14:15:49,853 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:15:49,855 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:15:50,698 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2674#(and (exists ((v_main_~i~0_BEFORE_CALL_32 Int) (|v_main_~#dst~0.base_BEFORE_CALL_30| Int) (|v_main_~#src~0.base_BEFORE_CALL_32| Int)) (and (<= 2 (+ |v_main_~#src~0.base_BEFORE_CALL_32| v_main_~i~0_BEFORE_CALL_32)) (<= 2 (+ v_main_~i~0_BEFORE_CALL_32 |v_main_~#dst~0.base_BEFORE_CALL_30|)) (<= 4 (+ |v_main_~#src~0.base_BEFORE_CALL_32| |v_main_~#dst~0.base_BEFORE_CALL_30|)) (<= 2 |v_main_~#dst~0.base_BEFORE_CALL_30|) (<= 2 |v_main_~#src~0.base_BEFORE_CALL_32|) (<= 1 (+ v_main_~i~0_BEFORE_CALL_32 |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#dst~0.base_BEFORE_CALL_30|) (<= 3 (+ |v_main_~#dst~0.base_BEFORE_CALL_30| |#StackHeapBarrier|)) (<= 0 v_main_~i~0_BEFORE_CALL_32) (<= (+ |#StackHeapBarrier| 1) |v_main_~#src~0.base_BEFORE_CALL_32|) (not (= (select (select |#memory_int| |v_main_~#src~0.base_BEFORE_CALL_32|) (* v_main_~i~0_BEFORE_CALL_32 4)) (select (select |#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_30|) (* v_main_~i~0_BEFORE_CALL_32 4)))) (<= 3 (+ |v_main_~#src~0.base_BEFORE_CALL_32| |#StackHeapBarrier|)))) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:15:50,698 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:15:50,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:15:50,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 61 [2023-04-02 14:15:50,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489840310] [2023-04-02 14:15:50,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:15:50,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-04-02 14:15:50,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:15:50,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-04-02 14:15:50,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1871, Invalid=3385, Unknown=0, NotChecked=0, Total=5256 [2023-04-02 14:15:50,701 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 61 states, 61 states have (on average 1.278688524590164) internal successors, (78), 61 states have internal predecessors, (78), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 14:15:50,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:15:50,771 INFO L93 Difference]: Finished difference Result 112 states and 145 transitions. [2023-04-02 14:15:50,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-04-02 14:15:50,781 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.278688524590164) internal successors, (78), 61 states have internal predecessors, (78), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2023-04-02 14:15:50,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:15:50,782 INFO L225 Difference]: With dead ends: 112 [2023-04-02 14:15:50,782 INFO L226 Difference]: Without dead ends: 88 [2023-04-02 14:15:50,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 116 SyntacticMatches, 8 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1885 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1871, Invalid=3385, Unknown=0, NotChecked=0, Total=5256 [2023-04-02 14:15:50,785 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:15:50,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:15:50,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-04-02 14:15:50,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-04-02 14:15:50,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 80 states have (on average 1.0375) internal successors, (83), 81 states have internal predecessors, (83), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:15:50,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2023-04-02 14:15:50,808 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 55 [2023-04-02 14:15:50,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:15:50,808 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2023-04-02 14:15:50,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.278688524590164) internal successors, (78), 61 states have internal predecessors, (78), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 14:15:50,808 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2023-04-02 14:15:50,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-02 14:15:50,809 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:15:50,809 INFO L195 NwaCegarLoop]: trace histogram [58, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:15:50,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 14:15:51,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:15:51,011 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:15:51,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:15:51,011 INFO L85 PathProgramCache]: Analyzing trace with hash 817783934, now seen corresponding path program 5 times [2023-04-02 14:15:51,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:15:51,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124082667] [2023-04-02 14:15:51,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:15:51,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:15:51,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:15:52,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 2 proven. 1711 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-02 14:15:52,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:15:52,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124082667] [2023-04-02 14:15:52,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124082667] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:15:52,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70596806] [2023-04-02 14:15:52,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:15:52,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:15:52,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:15:52,980 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:15:52,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 14:15:53,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 14:15:53,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:15:53,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 33 conjunts are in the unsatisfiable core [2023-04-02 14:15:53,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:15:53,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-02 14:15:53,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2023-04-02 14:15:55,527 WARN L861 $PredicateComparison]: unable to prove that (exists ((|v_main_~#dst~0.base_BEFORE_CALL_31| Int) (|v_main_~#src~0.base_BEFORE_CALL_33| Int) (|v_main_~#dst~0.offset_BEFORE_CALL_31| Int)) (and (= (select (select |c_#memory_int| |v_main_~#src~0.base_BEFORE_CALL_33|) 4) (select (select |c_#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_31|) (+ |v_main_~#dst~0.offset_BEFORE_CALL_31| 4))) (not (= |v_main_~#src~0.base_BEFORE_CALL_33| |v_main_~#dst~0.base_BEFORE_CALL_31|)))) is different from true [2023-04-02 14:15:59,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 10 [2023-04-02 14:16:01,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1711 trivial. 1 not checked. [2023-04-02 14:16:01,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:16:04,071 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 14:16:04,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 88 [2023-04-02 14:16:04,116 INFO L321 Elim1Store]: treesize reduction 10, result has 67.7 percent of original size [2023-04-02 14:16:04,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2023-04-02 14:16:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2023-04-02 14:16:04,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70596806] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:16:04,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [378602131] [2023-04-02 14:16:04,259 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:16:04,259 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:16:04,259 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:16:04,260 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:16:04,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:16:04,272 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:16:04,528 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2023-04-02 14:16:04,563 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:16:04,566 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:16:14,108 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3625#(and (<= 1 |#StackHeapBarrier|) (exists ((v_main_~i~0_BEFORE_CALL_41 Int) (|v_main_~#dst~0.base_BEFORE_CALL_39| Int) (|v_main_~#src~0.base_BEFORE_CALL_41| Int)) (and (<= 2 |v_main_~#dst~0.base_BEFORE_CALL_39|) (<= 3 (+ |v_main_~#dst~0.base_BEFORE_CALL_39| |#StackHeapBarrier|)) (<= 2 (+ v_main_~i~0_BEFORE_CALL_41 |v_main_~#dst~0.base_BEFORE_CALL_39|)) (not (= (select (select |#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_39|) (* v_main_~i~0_BEFORE_CALL_41 4)) (select (select |#memory_int| |v_main_~#src~0.base_BEFORE_CALL_41|) (* v_main_~i~0_BEFORE_CALL_41 4)))) (<= 0 v_main_~i~0_BEFORE_CALL_41) (<= (+ |#StackHeapBarrier| 1) |v_main_~#src~0.base_BEFORE_CALL_41|) (<= 4 (+ |v_main_~#src~0.base_BEFORE_CALL_41| |v_main_~#dst~0.base_BEFORE_CALL_39|)) (<= 2 (+ |v_main_~#src~0.base_BEFORE_CALL_41| v_main_~i~0_BEFORE_CALL_41)) (<= 2 |v_main_~#src~0.base_BEFORE_CALL_41|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#dst~0.base_BEFORE_CALL_39|) (<= 1 (+ v_main_~i~0_BEFORE_CALL_41 |#StackHeapBarrier|)) (<= 3 (+ |v_main_~#src~0.base_BEFORE_CALL_41| |#StackHeapBarrier|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:16:14,109 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:16:14,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:16:14,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 13, 10] total 79 [2023-04-02 14:16:14,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373253166] [2023-04-02 14:16:14,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:16:14,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-04-02 14:16:14,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:16:14,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-04-02 14:16:14,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1929, Invalid=6078, Unknown=7, NotChecked=176, Total=8190 [2023-04-02 14:16:14,112 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 79 states, 78 states have (on average 1.4230769230769231) internal successors, (111), 76 states have internal predecessors, (111), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:16:38,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-02 14:16:38,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:16:38,520 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2023-04-02 14:16:38,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-04-02 14:16:38,520 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 1.4230769230769231) internal successors, (111), 76 states have internal predecessors, (111), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 85 [2023-04-02 14:16:38,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:16:38,521 INFO L225 Difference]: With dead ends: 122 [2023-04-02 14:16:38,521 INFO L226 Difference]: Without dead ends: 98 [2023-04-02 14:16:38,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 217 SyntacticMatches, 9 SemanticMatches, 153 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5133 ImplicationChecksByTransitivity, 43.4s TimeCoverageRelationStatistics Valid=5685, Invalid=17870, Unknown=11, NotChecked=304, Total=23870 [2023-04-02 14:16:38,529 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-02 14:16:38,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 150 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 356 Invalid, 1 Unknown, 174 Unchecked, 2.2s Time] [2023-04-02 14:16:38,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-04-02 14:16:38,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2023-04-02 14:16:38,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 88 states have internal predecessors, (90), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:16:38,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2023-04-02 14:16:38,549 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 85 [2023-04-02 14:16:38,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:16:38,549 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2023-04-02 14:16:38,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 1.4230769230769231) internal successors, (111), 76 states have internal predecessors, (111), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:16:38,549 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2023-04-02 14:16:38,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-02 14:16:38,550 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:16:38,550 INFO L195 NwaCegarLoop]: trace histogram [59, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:16:38,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 14:16:38,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 14:16:38,753 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:16:38,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:16:38,753 INFO L85 PathProgramCache]: Analyzing trace with hash -2008100982, now seen corresponding path program 6 times [2023-04-02 14:16:38,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:16:38,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858343242] [2023-04-02 14:16:38,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:16:38,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:16:38,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:16:40,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 4 proven. 1770 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 14:16:40,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:16:40,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858343242] [2023-04-02 14:16:40,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858343242] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:16:40,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996323624] [2023-04-02 14:16:40,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:16:40,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:16:40,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:16:40,669 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:16:40,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 14:16:40,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:16:40,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:16:40,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 61 conjunts are in the unsatisfiable core [2023-04-02 14:16:40,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:16:40,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 14:16:40,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:16:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 4 proven. 1770 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 14:16:44,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996323624] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:16:44,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [650377455] [2023-04-02 14:16:44,316 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:16:44,316 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:16:44,316 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:16:44,316 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:16:44,316 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:16:44,332 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:16:44,581 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2023-04-02 14:16:44,601 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:16:44,602 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:16:45,935 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4829#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#src~0.base_BEFORE_CALL_48| Int) (v_main_~i~0_BEFORE_CALL_48 Int) (|v_main_~#dst~0.base_BEFORE_CALL_46| Int)) (and (<= 3 (+ |v_main_~#dst~0.base_BEFORE_CALL_46| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#src~0.base_BEFORE_CALL_48|) (not (= (select (select |#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_46|) (* v_main_~i~0_BEFORE_CALL_48 4)) (select (select |#memory_int| |v_main_~#src~0.base_BEFORE_CALL_48|) (* v_main_~i~0_BEFORE_CALL_48 4)))) (<= 4 (+ |v_main_~#src~0.base_BEFORE_CALL_48| |v_main_~#dst~0.base_BEFORE_CALL_46|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#dst~0.base_BEFORE_CALL_46|) (<= 0 v_main_~i~0_BEFORE_CALL_48) (<= 2 |v_main_~#dst~0.base_BEFORE_CALL_46|) (<= 1 (+ v_main_~i~0_BEFORE_CALL_48 |#StackHeapBarrier|)) (<= 2 (+ v_main_~i~0_BEFORE_CALL_48 |v_main_~#dst~0.base_BEFORE_CALL_46|)) (<= 2 |v_main_~#src~0.base_BEFORE_CALL_48|) (<= 3 (+ |v_main_~#src~0.base_BEFORE_CALL_48| |#StackHeapBarrier|)) (<= 2 (+ |v_main_~#src~0.base_BEFORE_CALL_48| v_main_~i~0_BEFORE_CALL_48)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:16:45,935 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:16:45,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:16:45,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 123 [2023-04-02 14:16:45,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077558275] [2023-04-02 14:16:45,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:16:45,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2023-04-02 14:16:45,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:16:45,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2023-04-02 14:16:45,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7544, Invalid=10546, Unknown=0, NotChecked=0, Total=18090 [2023-04-02 14:16:45,939 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand has 123 states, 123 states have (on average 1.1382113821138211) internal successors, (140), 123 states have internal predecessors, (140), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 14:16:46,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:16:46,105 INFO L93 Difference]: Finished difference Result 190 states and 254 transitions. [2023-04-02 14:16:46,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2023-04-02 14:16:46,106 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.1382113821138211) internal successors, (140), 123 states have internal predecessors, (140), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 94 [2023-04-02 14:16:46,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:16:46,107 INFO L225 Difference]: With dead ends: 190 [2023-04-02 14:16:46,107 INFO L226 Difference]: Without dead ends: 158 [2023-04-02 14:16:46,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 200 SyntacticMatches, 10 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4239 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=7544, Invalid=10546, Unknown=0, NotChecked=0, Total=18090 [2023-04-02 14:16:46,108 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:16:46,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:16:46,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-04-02 14:16:46,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2023-04-02 14:16:46,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 148 states have (on average 1.0202702702702702) internal successors, (151), 149 states have internal predecessors, (151), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:16:46,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2023-04-02 14:16:46,135 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 94 [2023-04-02 14:16:46,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:16:46,135 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2023-04-02 14:16:46,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.1382113821138211) internal successors, (140), 123 states have internal predecessors, (140), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 14:16:46,136 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2023-04-02 14:16:46,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-04-02 14:16:46,137 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:16:46,137 INFO L195 NwaCegarLoop]: trace histogram [120, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:16:46,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 14:16:46,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:16:46,344 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:16:46,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:16:46,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1729287558, now seen corresponding path program 7 times [2023-04-02 14:16:46,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:16:46,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809561208] [2023-04-02 14:16:46,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:16:46,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:16:46,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:16:53,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7284 backedges. 4 proven. 7260 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 14:16:53,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:16:53,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809561208] [2023-04-02 14:16:53,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809561208] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:16:53,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490999882] [2023-04-02 14:16:53,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:16:53,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:16:53,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:16:53,189 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:16:53,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 14:16:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:16:53,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 1222 conjuncts, 122 conjunts are in the unsatisfiable core [2023-04-02 14:16:53,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:16:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 7284 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 14:16:53,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:17:06,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7284 backedges. 4 proven. 7260 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 14:17:06,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490999882] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:17:06,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [108290871] [2023-04-02 14:17:06,972 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:17:06,972 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:17:06,972 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:17:06,972 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:17:06,972 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:17:06,989 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:17:07,215 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2023-04-02 14:17:07,249 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:17:07,251 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:17:09,523 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6647#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#dst~0.base_BEFORE_CALL_53| Int) (v_main_~i~0_BEFORE_CALL_55 Int) (|v_main_~#src~0.base_BEFORE_CALL_55| Int)) (and (<= 1 (+ v_main_~i~0_BEFORE_CALL_55 |#StackHeapBarrier|)) (<= 3 (+ |v_main_~#src~0.base_BEFORE_CALL_55| |#StackHeapBarrier|)) (<= 4 (+ |v_main_~#src~0.base_BEFORE_CALL_55| |v_main_~#dst~0.base_BEFORE_CALL_53|)) (<= 2 |v_main_~#dst~0.base_BEFORE_CALL_53|) (<= 3 (+ |v_main_~#dst~0.base_BEFORE_CALL_53| |#StackHeapBarrier|)) (<= 2 |v_main_~#src~0.base_BEFORE_CALL_55|) (<= 2 (+ v_main_~i~0_BEFORE_CALL_55 |v_main_~#dst~0.base_BEFORE_CALL_53|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#dst~0.base_BEFORE_CALL_53|) (<= 2 (+ |v_main_~#src~0.base_BEFORE_CALL_55| v_main_~i~0_BEFORE_CALL_55)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#src~0.base_BEFORE_CALL_55|) (<= 0 v_main_~i~0_BEFORE_CALL_55) (not (= (select (select |#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_53|) (* v_main_~i~0_BEFORE_CALL_55 4)) (select (select |#memory_int| |v_main_~#src~0.base_BEFORE_CALL_55|) (* v_main_~i~0_BEFORE_CALL_55 4)))))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:17:09,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:17:09,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:17:09,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123, 123] total 245 [2023-04-02 14:17:09,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574218491] [2023-04-02 14:17:09,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:17:09,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 245 states [2023-04-02 14:17:09,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:17:09,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 245 interpolants. [2023-04-02 14:17:09,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29931, Invalid=35861, Unknown=0, NotChecked=0, Total=65792 [2023-04-02 14:17:09,533 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand has 245 states, 245 states have (on average 1.0693877551020408) internal successors, (262), 245 states have internal predecessors, (262), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 14:17:10,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:17:10,006 INFO L93 Difference]: Finished difference Result 312 states and 437 transitions. [2023-04-02 14:17:10,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 244 states. [2023-04-02 14:17:10,007 INFO L78 Accepts]: Start accepts. Automaton has has 245 states, 245 states have (on average 1.0693877551020408) internal successors, (262), 245 states have internal predecessors, (262), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 155 [2023-04-02 14:17:10,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:17:10,009 INFO L225 Difference]: With dead ends: 312 [2023-04-02 14:17:10,009 INFO L226 Difference]: Without dead ends: 280 [2023-04-02 14:17:10,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 322 SyntacticMatches, 10 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8509 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=29931, Invalid=35861, Unknown=0, NotChecked=0, Total=65792 [2023-04-02 14:17:10,014 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 14:17:10,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 121 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 14:17:10,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2023-04-02 14:17:10,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2023-04-02 14:17:10,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 270 states have (on average 1.011111111111111) internal successors, (273), 271 states have internal predecessors, (273), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:17:10,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 282 transitions. [2023-04-02 14:17:10,095 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 282 transitions. Word has length 155 [2023-04-02 14:17:10,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:17:10,096 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 282 transitions. [2023-04-02 14:17:10,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 245 states, 245 states have (on average 1.0693877551020408) internal successors, (262), 245 states have internal predecessors, (262), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 14:17:10,097 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 282 transitions. [2023-04-02 14:17:10,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2023-04-02 14:17:10,099 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:17:10,099 INFO L195 NwaCegarLoop]: trace histogram [242, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:17:10,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 14:17:10,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 14:17:10,308 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:17:10,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:17:10,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1938815878, now seen corresponding path program 8 times [2023-04-02 14:17:10,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:17:10,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616127424] [2023-04-02 14:17:10,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:17:10,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:17:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:17:36,956 INFO L134 CoverageAnalysis]: Checked inductivity of 29427 backedges. 4 proven. 29403 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 14:17:36,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:17:36,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616127424] [2023-04-02 14:17:36,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616127424] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:17:36,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553466715] [2023-04-02 14:17:36,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:17:36,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:17:36,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:17:36,958 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:17:36,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 14:17:37,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 14:17:37,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:17:37,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-02 14:17:37,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:17:39,033 INFO L134 CoverageAnalysis]: Checked inductivity of 29427 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 29407 trivial. 0 not checked. [2023-04-02 14:17:39,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:17:39,575 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-02 14:17:39,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 25 [2023-04-02 14:17:40,090 INFO L134 CoverageAnalysis]: Checked inductivity of 29427 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 29407 trivial. 0 not checked. [2023-04-02 14:17:40,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553466715] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:17:40,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1579461661] [2023-04-02 14:17:40,091 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 14:17:40,092 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:17:40,092 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:17:40,092 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:17:40,092 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:17:40,103 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:17:40,359 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2023-04-02 14:17:40,381 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:17:40,383 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:17:44,596 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9703#(and (exists ((|v_main_~#dst~0.base_BEFORE_CALL_60| Int) (v_main_~i~0_BEFORE_CALL_66 Int) (|v_main_~#src~0.base_BEFORE_CALL_66| Int)) (and (<= 2 |v_main_~#dst~0.base_BEFORE_CALL_60|) (<= 1 (+ v_main_~i~0_BEFORE_CALL_66 |#StackHeapBarrier|)) (not (= (select (select |#memory_int| |v_main_~#src~0.base_BEFORE_CALL_66|) (* v_main_~i~0_BEFORE_CALL_66 4)) (select (select |#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_60|) (* v_main_~i~0_BEFORE_CALL_66 4)))) (<= 2 |v_main_~#src~0.base_BEFORE_CALL_66|) (<= 3 (+ |v_main_~#dst~0.base_BEFORE_CALL_60| |#StackHeapBarrier|)) (<= 4 (+ |v_main_~#src~0.base_BEFORE_CALL_66| |v_main_~#dst~0.base_BEFORE_CALL_60|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#dst~0.base_BEFORE_CALL_60|) (<= 2 (+ |v_main_~#src~0.base_BEFORE_CALL_66| v_main_~i~0_BEFORE_CALL_66)) (<= 2 (+ v_main_~i~0_BEFORE_CALL_66 |v_main_~#dst~0.base_BEFORE_CALL_60|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#src~0.base_BEFORE_CALL_66|) (<= 0 v_main_~i~0_BEFORE_CALL_66) (<= 3 (+ |v_main_~#src~0.base_BEFORE_CALL_66| |#StackHeapBarrier|)))) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:17:44,597 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:17:44,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:17:44,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [245, 12, 11] total 263 [2023-04-02 14:17:44,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434839187] [2023-04-02 14:17:44,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:17:44,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 263 states [2023-04-02 14:17:44,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:17:44,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 263 interpolants. [2023-04-02 14:17:44,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29998, Invalid=45352, Unknown=0, NotChecked=0, Total=75350 [2023-04-02 14:17:44,605 INFO L87 Difference]: Start difference. First operand 280 states and 282 transitions. Second operand has 263 states, 263 states have (on average 1.1254752851711027) internal successors, (296), 263 states have internal predecessors, (296), 6 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 14:18:08,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:18:08,653 INFO L93 Difference]: Finished difference Result 339 states and 345 transitions. [2023-04-02 14:18:08,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2023-04-02 14:18:08,654 INFO L78 Accepts]: Start accepts. Automaton has has 263 states, 263 states have (on average 1.1254752851711027) internal successors, (296), 263 states have internal predecessors, (296), 6 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 277 [2023-04-02 14:18:08,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:18:08,656 INFO L225 Difference]: With dead ends: 339 [2023-04-02 14:18:08,656 INFO L226 Difference]: Without dead ends: 288 [2023-04-02 14:18:08,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1320 GetRequests, 789 SyntacticMatches, 13 SemanticMatches, 518 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43393 ImplicationChecksByTransitivity, 46.6s TimeCoverageRelationStatistics Valid=90036, Invalid=179844, Unknown=0, NotChecked=0, Total=269880 [2023-04-02 14:18:08,668 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 14:18:08,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 207 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 14:18:08,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2023-04-02 14:18:08,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 283. [2023-04-02 14:18:08,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 273 states have (on average 1.010989010989011) internal successors, (276), 274 states have internal predecessors, (276), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 14:18:08,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 285 transitions. [2023-04-02 14:18:08,723 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 285 transitions. Word has length 277 [2023-04-02 14:18:08,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:18:08,723 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 285 transitions. [2023-04-02 14:18:08,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 263 states, 263 states have (on average 1.1254752851711027) internal successors, (296), 263 states have internal predecessors, (296), 6 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 14:18:08,723 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 285 transitions. [2023-04-02 14:18:08,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2023-04-02 14:18:08,725 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:18:08,725 INFO L195 NwaCegarLoop]: trace histogram [243, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:18:08,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-02 14:18:08,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-02 14:18:08,932 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:18:08,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:18:08,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1597062465, now seen corresponding path program 9 times [2023-04-02 14:18:08,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:18:08,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894953409] [2023-04-02 14:18:08,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:18:08,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:18:09,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:18:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 29676 backedges. 4 proven. 29646 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-02 14:18:36,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:18:36,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894953409] [2023-04-02 14:18:36,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894953409] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:18:36,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811900357] [2023-04-02 14:18:36,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:18:36,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:18:36,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:18:36,583 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:18:36,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-02 14:18:37,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:18:37,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:18:37,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 2338 conjuncts, 245 conjunts are in the unsatisfiable core [2023-04-02 14:18:37,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:18:37,431 INFO L134 CoverageAnalysis]: Checked inductivity of 29676 backedges. 0 proven. 29646 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 14:18:37,431 INFO L327 TraceCheckSpWp]: Computing backward predicates...