/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/array-fpi/nsqm.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:06:38,509 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:06:38,510 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:06:38,533 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:06:38,533 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:06:38,534 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:06:38,535 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:06:38,536 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:06:38,537 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:06:38,538 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:06:38,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:06:38,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:06:38,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:06:38,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:06:38,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:06:38,542 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:06:38,543 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:06:38,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:06:38,545 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:06:38,546 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:06:38,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:06:38,548 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:06:38,549 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:06:38,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:06:38,552 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:06:38,552 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:06:38,552 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:06:38,553 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:06:38,553 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:06:38,554 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:06:38,554 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:06:38,555 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:06:38,555 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:06:38,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:06:38,556 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:06:38,557 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:06:38,557 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:06:38,557 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:06:38,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:06:38,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:06:38,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:06:38,560 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 09:06:38,578 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:06:38,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:06:38,578 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:06:38,578 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:06:38,579 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:06:38,579 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:06:38,579 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:06:38,580 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:06:38,580 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:06:38,580 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:06:38,580 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:06:38,580 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:06:38,580 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:06:38,581 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:06:38,581 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:06:38,581 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:06:38,581 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:06:38,581 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:06:38,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:06:38,582 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:06:38,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:06:38,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:06:38,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:06:38,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:06:38,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:06:38,582 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:06:38,583 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:06:38,583 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:06:38,583 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:06:38,583 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:06:38,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:06:38,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:06:38,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:06:38,584 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:06:38,584 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:06:38,584 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:06:38,584 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:06:38,584 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:06:38,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:06:38,584 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:06:38,584 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:06:38,585 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:06:38,799 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:06:38,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:06:38,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:06:38,823 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:06:38,823 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:06:38,824 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/nsqm.c [2023-04-01 09:06:40,094 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:06:40,312 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:06:40,312 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/nsqm.c [2023-04-01 09:06:40,317 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7966e6c04/5e5a9a8064bc445ea9bab06f54e0b947/FLAG8083919fa [2023-04-01 09:06:40,329 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7966e6c04/5e5a9a8064bc445ea9bab06f54e0b947 [2023-04-01 09:06:40,331 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:06:40,332 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:06:40,333 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:06:40,334 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:06:40,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:06:40,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:06:40" (1/1) ... [2023-04-01 09:06:40,338 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a14992e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:40, skipping insertion in model container [2023-04-01 09:06:40,338 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:06:40" (1/1) ... [2023-04-01 09:06:40,343 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:06:40,354 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:06:40,479 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-fpi/nsqm.c[587,600] [2023-04-01 09:06:40,504 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:06:40,513 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:06:40,528 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-fpi/nsqm.c[587,600] [2023-04-01 09:06:40,543 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:06:40,553 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:06:40,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:40 WrapperNode [2023-04-01 09:06:40,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:06:40,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:06:40,554 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:06:40,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:06:40,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:40" (1/1) ... [2023-04-01 09:06:40,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:40" (1/1) ... [2023-04-01 09:06:40,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:40" (1/1) ... [2023-04-01 09:06:40,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:40" (1/1) ... [2023-04-01 09:06:40,575 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:40" (1/1) ... [2023-04-01 09:06:40,578 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:40" (1/1) ... [2023-04-01 09:06:40,579 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:40" (1/1) ... [2023-04-01 09:06:40,579 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:40" (1/1) ... [2023-04-01 09:06:40,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:06:40,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:06:40,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:06:40,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:06:40,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:40" (1/1) ... [2023-04-01 09:06:40,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:06:40,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:06:40,615 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 09:06:40,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 09:06:40,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:06:40,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:06:40,641 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:06:40,642 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 09:06:40,642 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 09:06:40,642 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:06:40,642 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:06:40,642 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:06:40,642 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:06:40,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:06:40,642 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 09:06:40,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 09:06:40,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:06:40,643 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 09:06:40,643 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:06:40,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 09:06:40,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:06:40,643 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:06:40,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:06:40,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:06:40,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:06:40,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:06:40,711 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:06:40,713 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:06:40,866 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:06:40,909 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:06:40,909 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 09:06:40,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:06:40 BoogieIcfgContainer [2023-04-01 09:06:40,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:06:40,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:06:40,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:06:40,916 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:06:40,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:06:40" (1/3) ... [2023-04-01 09:06:40,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79da4a11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:06:40, skipping insertion in model container [2023-04-01 09:06:40,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:06:40" (2/3) ... [2023-04-01 09:06:40,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79da4a11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:06:40, skipping insertion in model container [2023-04-01 09:06:40,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:06:40" (3/3) ... [2023-04-01 09:06:40,918 INFO L112 eAbstractionObserver]: Analyzing ICFG nsqm.c [2023-04-01 09:06:40,935 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:06:40,935 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:06:41,001 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:06:41,010 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;@737c227e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:06:41,010 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:06:41,014 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 09:06:41,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 09:06:41,020 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:06:41,020 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:06:41,022 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:06:41,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:06:41,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1001205354, now seen corresponding path program 1 times [2023-04-01 09:06:41,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:06:41,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904017738] [2023-04-01 09:06:41,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:06:41,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:06:41,149 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:06:41,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1982669882] [2023-04-01 09:06:41,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:06:41,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:06:41,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:06:41,157 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:06:41,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 09:06:41,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:06:41,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-01 09:06:41,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:06:41,380 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2023-04-01 09:06:41,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2023-04-01 09:06:41,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-04-01 09:06:41,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-04-01 09:06:41,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 18 treesize of output 7 [2023-04-01 09:06:41,558 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 7 treesize of output 5 [2023-04-01 09:06:41,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 17 treesize of output 9 [2023-04-01 09:06:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:06:41,736 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:06:41,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:06:41,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904017738] [2023-04-01 09:06:41,737 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:06:41,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982669882] [2023-04-01 09:06:41,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982669882] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:06:41,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:06:41,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 09:06:41,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599921891] [2023-04-01 09:06:41,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:06:41,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 09:06:41,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:06:41,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 09:06:41,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 09:06:41,775 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:06:41,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:06:41,984 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2023-04-01 09:06:41,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 09:06:41,987 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-04-01 09:06:41,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:06:41,992 INFO L225 Difference]: With dead ends: 58 [2023-04-01 09:06:41,992 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 09:06:41,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-04-01 09:06:42,000 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 37 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:06:42,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 100 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:06:42,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 09:06:42,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2023-04-01 09:06:42,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 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) [2023-04-01 09:06:42,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-04-01 09:06:42,045 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 17 [2023-04-01 09:06:42,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:06:42,045 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-04-01 09:06:42,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:06:42,046 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-04-01 09:06:42,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 09:06:42,047 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:06:42,047 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:06:42,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 09:06:42,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-01 09:06:42,253 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:06:42,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:06:42,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1191020082, now seen corresponding path program 1 times [2023-04-01 09:06:42,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:06:42,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706235255] [2023-04-01 09:06:42,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:06:42,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:06:42,302 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:06:42,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1627394606] [2023-04-01 09:06:42,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:06:42,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:06:42,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:06:42,315 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:06:42,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 09:06:42,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:06:42,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:06:42,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:06:42,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:06:42,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:06:42,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:06:42,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:06:42,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706235255] [2023-04-01 09:06:42,453 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:06:42,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627394606] [2023-04-01 09:06:42,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627394606] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:06:42,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [625289146] [2023-04-01 09:06:42,488 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:06:42,489 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:06:42,492 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:06:42,496 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:06:42,496 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:06:42,746 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 83 for LOIs [2023-04-01 09:06:44,560 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 103 for LOIs [2023-04-01 09:06:44,630 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 88 for LOIs [2023-04-01 09:06:44,643 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:06:44,651 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:06:46,695 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '326#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (<= ~N~0 1) (= |#NULL.offset| 0) (< 0 ~N~0) (exists ((v_main_~a~0.base_BEFORE_CALL_1 Int) (|v_old(#length)_BEFORE_CALL_3| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_3| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_3| (Array Int Int))) (and (not (= (select |v_old(#memory_int)_BEFORE_CALL_3| 2) |v_old(#length)_BEFORE_CALL_3|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 6) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 1) 0) 48) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_3| 0) 0) (= 115 (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 2) 113) (not (= |v_old(#valid)_BEFORE_CALL_3| |v_old(#length)_BEFORE_CALL_3|)) (not (= v_main_~a~0.base_BEFORE_CALL_1 0)) (not (= v_main_~a~0.base_BEFORE_CALL_1 3)) (= 2 (select |v_old(#length)_BEFORE_CALL_3| 1)) (= (select |v_old(#length)_BEFORE_CALL_3| 3) 12) (not (= |v_old(#length)_BEFORE_CALL_3| (select |v_old(#memory_int)_BEFORE_CALL_3| 1))) (not (= (select |v_old(#memory_int)_BEFORE_CALL_3| 2) |v_old(#valid)_BEFORE_CALL_3|)) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 0)) (= (select |v_old(#valid)_BEFORE_CALL_3| v_main_~a~0.base_BEFORE_CALL_1) 0) (not (= v_main_~a~0.base_BEFORE_CALL_1 1)) (not (= v_main_~a~0.base_BEFORE_CALL_1 |#StackHeapBarrier|)) (not (= |v_old(#valid)_BEFORE_CALL_3| (select |v_old(#memory_int)_BEFORE_CALL_3| 1))) (= (select |v_old(#valid)_BEFORE_CALL_3| 2) 1) (not (= (+ ~N~0 1) (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_1) 0))) (= (select |v_old(#valid)_BEFORE_CALL_3| 1) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 4) 46) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 5) 99) (= (select |v_old(#valid)_BEFORE_CALL_3| 3) 1) (= (select |v_old(#length)_BEFORE_CALL_3| 2) 7) (= 109 (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 3)) (not (= v_main_~a~0.base_BEFORE_CALL_1 2)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_3| 2) (select |v_old(#memory_int)_BEFORE_CALL_3| 1))))) (= |#NULL.base| 0))' at error location [2023-04-01 09:06:46,695 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:06:46,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:06:46,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2023-04-01 09:06:46,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314709851] [2023-04-01 09:06:46,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:06:46,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 09:06:46,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:06:46,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 09:06:46,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2023-04-01 09:06:46,698 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:06:46,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:06:46,799 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2023-04-01 09:06:46,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 09:06:46,800 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-04-01 09:06:46,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:06:46,801 INFO L225 Difference]: With dead ends: 51 [2023-04-01 09:06:46,802 INFO L226 Difference]: Without dead ends: 42 [2023-04-01 09:06:46,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2023-04-01 09:06:46,803 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:06:46,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 58 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:06:46,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-04-01 09:06:46,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2023-04-01 09:06:46,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 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) [2023-04-01 09:06:46,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2023-04-01 09:06:46,810 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2023-04-01 09:06:46,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:06:46,811 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2023-04-01 09:06:46,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:06:46,811 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2023-04-01 09:06:46,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 09:06:46,811 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:06:46,812 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:06:46,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 09:06:47,018 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,SelfDestructingSolverStorable1 [2023-04-01 09:06:47,018 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:06:47,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:06:47,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1062231974, now seen corresponding path program 1 times [2023-04-01 09:06:47,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:06:47,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342462937] [2023-04-01 09:06:47,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:06:47,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:06:47,050 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:06:47,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671194311] [2023-04-01 09:06:47,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:06:47,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:06:47,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:06:47,055 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:06:47,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 09:06:47,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:06:47,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:06:47,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:06:47,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:06:47,118 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:06:47,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:06:47,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342462937] [2023-04-01 09:06:47,119 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:06:47,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671194311] [2023-04-01 09:06:47,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671194311] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:06:47,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:06:47,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 09:06:47,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284735073] [2023-04-01 09:06:47,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:06:47,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 09:06:47,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:06:47,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 09:06:47,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 09:06:47,121 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:06:47,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:06:47,157 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2023-04-01 09:06:47,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 09:06:47,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-04-01 09:06:47,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:06:47,158 INFO L225 Difference]: With dead ends: 43 [2023-04-01 09:06:47,158 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 09:06:47,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:06:47,159 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 09:06:47,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 38 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 09:06:47,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 09:06:47,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2023-04-01 09:06:47,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 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) [2023-04-01 09:06:47,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-04-01 09:06:47,166 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 18 [2023-04-01 09:06:47,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:06:47,166 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-04-01 09:06:47,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:06:47,166 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-04-01 09:06:47,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 09:06:47,167 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:06:47,167 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:06:47,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 09:06:47,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:06:47,373 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:06:47,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:06:47,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1643446050, now seen corresponding path program 1 times [2023-04-01 09:06:47,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:06:47,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673323803] [2023-04-01 09:06:47,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:06:47,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:06:47,399 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:06:47,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317110832] [2023-04-01 09:06:47,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:06:47,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:06:47,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:06:47,401 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:06:47,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 09:06:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:06:47,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 32 conjunts are in the unsatisfiable core [2023-04-01 09:06:47,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:06:47,522 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2023-04-01 09:06:47,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2023-04-01 09:06:47,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-04-01 09:06:47,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-04-01 09:06:47,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 40 treesize of output 13 [2023-04-01 09:06:47,562 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 7 treesize of output 5 [2023-04-01 09:06:47,590 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 [2023-04-01 09:06:47,608 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 16 treesize of output 18 [2023-04-01 09:06:47,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 23 treesize of output 22 [2023-04-01 09:06:47,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 17 treesize of output 9 [2023-04-01 09:06:47,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:06:47,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:06:47,901 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:06:47,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:06:47,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:06:47,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673323803] [2023-04-01 09:06:47,920 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:06:47,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317110832] [2023-04-01 09:06:47,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317110832] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:06:47,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2040818475] [2023-04-01 09:06:47,923 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:06:47,923 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:06:47,923 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:06:47,923 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:06:47,923 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:06:47,995 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 83 for LOIs [2023-04-01 09:06:49,960 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 102 for LOIs [2023-04-01 09:06:50,020 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 88 for LOIs [2023-04-01 09:06:50,032 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:06:50,038 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:06:51,646 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '770#(and (exists ((v_main_~a~0.base_BEFORE_CALL_2 Int) (|v_old(#valid)_BEFORE_CALL_7| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_7| (Array Int (Array Int Int))) (|v_old(#length)_BEFORE_CALL_7| (Array Int Int))) (and (not (= v_main_~a~0.base_BEFORE_CALL_2 1)) (= (select |v_old(#valid)_BEFORE_CALL_7| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_7| 2) 1) (not (= (+ ~N~0 1) (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_2) 0))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 0) 110) (= (select |v_old(#valid)_BEFORE_CALL_7| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 1) 0) (= 99 (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 5)) (not (= v_main_~a~0.base_BEFORE_CALL_2 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 0) 48) (= 7 (select |v_old(#length)_BEFORE_CALL_7| 2)) (= (select |v_old(#valid)_BEFORE_CALL_7| 3) 1) (= 115 (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 1)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 1) |v_old(#valid)_BEFORE_CALL_7|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 2) |v_old(#length)_BEFORE_CALL_7|)) (= 109 (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 3)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 6) 0) (= 2 (select |v_old(#length)_BEFORE_CALL_7| 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 2) 113) (= 46 (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 4)) (not (= v_main_~a~0.base_BEFORE_CALL_2 3)) (= (select |v_old(#valid)_BEFORE_CALL_7| v_main_~a~0.base_BEFORE_CALL_2) 0) (= (select |v_old(#length)_BEFORE_CALL_7| 3) 12) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 1) |v_old(#length)_BEFORE_CALL_7|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 2) |v_old(#valid)_BEFORE_CALL_7|)) (not (= v_main_~a~0.base_BEFORE_CALL_2 |#StackHeapBarrier|)) (not (= |v_old(#valid)_BEFORE_CALL_7| |v_old(#length)_BEFORE_CALL_7|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 1) (select |v_old(#memory_int)_BEFORE_CALL_7| 2))) (not (= v_main_~a~0.base_BEFORE_CALL_2 2)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (< 0 ~N~0) (= |#NULL.base| 0))' at error location [2023-04-01 09:06:51,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:06:51,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:06:51,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2023-04-01 09:06:51,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669156242] [2023-04-01 09:06:51,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:06:51,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 09:06:51,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:06:51,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 09:06:51,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=949, Unknown=8, NotChecked=0, Total=1056 [2023-04-01 09:06:51,649 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 18 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:06:52,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:06:52,115 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2023-04-01 09:06:52,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 09:06:52,121 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 19 [2023-04-01 09:06:52,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:06:52,122 INFO L225 Difference]: With dead ends: 51 [2023-04-01 09:06:52,122 INFO L226 Difference]: Without dead ends: 49 [2023-04-01 09:06:52,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=156, Invalid=1395, Unknown=9, NotChecked=0, Total=1560 [2023-04-01 09:06:52,124 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:06:52,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 91 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:06:52,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-04-01 09:06:52,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2023-04-01 09:06:52,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 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) [2023-04-01 09:06:52,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2023-04-01 09:06:52,132 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 19 [2023-04-01 09:06:52,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:06:52,132 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2023-04-01 09:06:52,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:06:52,133 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2023-04-01 09:06:52,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 09:06:52,133 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:06:52,133 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:06:52,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 09:06:52,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:06:52,341 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:06:52,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:06:52,341 INFO L85 PathProgramCache]: Analyzing trace with hash -230270114, now seen corresponding path program 2 times [2023-04-01 09:06:52,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:06:52,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114766360] [2023-04-01 09:06:52,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:06:52,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:06:52,370 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:06:52,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089667012] [2023-04-01 09:06:52,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:06:52,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:06:52,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:06:52,375 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:06:52,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 09:06:52,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 09:06:52,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:06:52,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 09:06:52,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:06:52,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 09:06:52,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:06:52,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 09:06:52,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:06:52,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114766360] [2023-04-01 09:06:52,563 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:06:52,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089667012] [2023-04-01 09:06:52,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089667012] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:06:52,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1551621473] [2023-04-01 09:06:52,564 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:06:52,564 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:06:52,565 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:06:52,565 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:06:52,565 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:06:52,646 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 83 for LOIs [2023-04-01 09:06:54,334 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 102 for LOIs [2023-04-01 09:06:54,388 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 88 for LOIs [2023-04-01 09:06:54,397 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:06:54,405 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:06:55,792 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1061#(and (exists ((|v_old(#memory_int)_BEFORE_CALL_11| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_11| (Array Int Int)) (|v_old(#length)_BEFORE_CALL_11| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_3 Int)) (and (not (= (select |v_old(#memory_int)_BEFORE_CALL_11| 2) |v_old(#valid)_BEFORE_CALL_11|)) (not (= v_main_~a~0.base_BEFORE_CALL_3 1)) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 0)) (not (= |v_old(#valid)_BEFORE_CALL_11| (select |v_old(#memory_int)_BEFORE_CALL_11| 1))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 6) 0) (not (= v_main_~a~0.base_BEFORE_CALL_3 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 2) 113) (not (= (select |v_old(#memory_int)_BEFORE_CALL_11| 2) (select |v_old(#memory_int)_BEFORE_CALL_11| 1))) (not (= (+ ~N~0 1) (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_3) 0))) (not (= v_main_~a~0.base_BEFORE_CALL_3 3)) (= 1 (select |v_old(#valid)_BEFORE_CALL_11| 2)) (= 7 (select |v_old(#length)_BEFORE_CALL_11| 2)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_11| 2) |v_old(#length)_BEFORE_CALL_11|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_11| v_main_~a~0.base_BEFORE_CALL_3) 0) (not (= |v_old(#length)_BEFORE_CALL_11| (select |v_old(#memory_int)_BEFORE_CALL_11| 1))) (= 109 (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 3)) (not (= v_main_~a~0.base_BEFORE_CALL_3 |#StackHeapBarrier|)) (= 12 (select |v_old(#length)_BEFORE_CALL_11| 3)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_11| 1) 0)) (= (select |v_old(#valid)_BEFORE_CALL_11| 1) 1) (not (= v_main_~a~0.base_BEFORE_CALL_3 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 5) 99) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 4) 46) (= (select |v_old(#valid)_BEFORE_CALL_11| 3) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 1) 115) (= (select |v_old(#length)_BEFORE_CALL_11| 1) 2) (not (= |v_old(#valid)_BEFORE_CALL_11| |v_old(#length)_BEFORE_CALL_11|)) (= (select |v_old(#valid)_BEFORE_CALL_11| 0) 0))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (< 0 ~N~0) (= |#NULL.base| 0))' at error location [2023-04-01 09:06:55,792 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:06:55,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:06:55,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-04-01 09:06:55,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873744475] [2023-04-01 09:06:55,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:06:55,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 09:06:55,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:06:55,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 09:06:55,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2023-04-01 09:06:55,794 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:06:55,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:06:55,920 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2023-04-01 09:06:55,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 09:06:55,921 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-04-01 09:06:55,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:06:55,922 INFO L225 Difference]: With dead ends: 62 [2023-04-01 09:06:55,922 INFO L226 Difference]: Without dead ends: 40 [2023-04-01 09:06:55,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2023-04-01 09:06:55,925 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:06:55,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 38 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:06:55,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-01 09:06:55,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2023-04-01 09:06:55,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 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) [2023-04-01 09:06:55,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2023-04-01 09:06:55,939 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 21 [2023-04-01 09:06:55,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:06:55,939 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2023-04-01 09:06:55,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:06:55,940 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2023-04-01 09:06:55,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 09:06:55,940 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:06:55,940 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:06:55,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 09:06:56,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:06:56,141 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:06:56,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:06:56,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1433039066, now seen corresponding path program 3 times [2023-04-01 09:06:56,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:06:56,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127694660] [2023-04-01 09:06:56,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:06:56,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:06:56,179 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:06:56,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892732279] [2023-04-01 09:06:56,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 09:06:56,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:06:56,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:06:56,186 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:06:56,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 09:06:56,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 09:06:56,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:06:56,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 09:06:56,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:06:56,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:06:56,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:06:56,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:06:56,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:06:56,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127694660] [2023-04-01 09:06:56,323 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:06:56,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892732279] [2023-04-01 09:06:56,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892732279] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:06:56,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1591643367] [2023-04-01 09:06:56,324 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:06:56,324 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:06:56,325 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:06:56,325 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:06:56,325 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:06:56,376 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 83 for LOIs [2023-04-01 09:06:57,860 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 102 for LOIs [2023-04-01 09:06:57,914 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 88 for LOIs [2023-04-01 09:06:57,929 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:06:57,933 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:06:59,399 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1380#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (exists ((|v_old(#length)_BEFORE_CALL_15| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_15| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_15| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_4 Int)) (and (not (= v_main_~a~0.base_BEFORE_CALL_4 1)) (= (select |v_old(#valid)_BEFORE_CALL_15| v_main_~a~0.base_BEFORE_CALL_4) 0) (= (select |v_old(#valid)_BEFORE_CALL_15| 2) 1) (= (select |v_old(#length)_BEFORE_CALL_15| 3) 12) (= (select |v_old(#valid)_BEFORE_CALL_15| 0) 0) (not (= |v_old(#valid)_BEFORE_CALL_15| |v_old(#length)_BEFORE_CALL_15|)) (not (= |v_old(#valid)_BEFORE_CALL_15| (select |v_old(#memory_int)_BEFORE_CALL_15| 1))) (= 7 (select |v_old(#length)_BEFORE_CALL_15| 2)) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 0)) (= 109 (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 3)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 1) 0) 48) (not (= v_main_~a~0.base_BEFORE_CALL_4 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 6) 0) (= 113 (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 2)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_15| 2) |v_old(#length)_BEFORE_CALL_15|)) (= (select |v_old(#length)_BEFORE_CALL_15| 1) 2) (= (select |v_old(#valid)_BEFORE_CALL_15| 1) 1) (not (= v_main_~a~0.base_BEFORE_CALL_4 3)) (not (= |v_old(#valid)_BEFORE_CALL_15| (select |v_old(#memory_int)_BEFORE_CALL_15| 2))) (= 46 (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 4)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_15| 2) (select |v_old(#memory_int)_BEFORE_CALL_15| 1))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 1) 115) (not (= v_main_~a~0.base_BEFORE_CALL_4 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 5) 99) (not (= (+ ~N~0 1) (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_4) 0))) (not (= |v_old(#length)_BEFORE_CALL_15| (select |v_old(#memory_int)_BEFORE_CALL_15| 1))) (= (select |v_old(#valid)_BEFORE_CALL_15| 3) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 1) 1) 0) (not (= v_main_~a~0.base_BEFORE_CALL_4 |#StackHeapBarrier|)))) (= |#NULL.offset| 0) (< 0 ~N~0) (= |#NULL.base| 0))' at error location [2023-04-01 09:06:59,399 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:06:59,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:06:59,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2023-04-01 09:06:59,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988639061] [2023-04-01 09:06:59,400 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:06:59,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 09:06:59,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:06:59,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 09:06:59,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2023-04-01 09:06:59,401 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:06:59,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:06:59,635 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2023-04-01 09:06:59,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 09:06:59,635 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-04-01 09:06:59,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:06:59,636 INFO L225 Difference]: With dead ends: 64 [2023-04-01 09:06:59,637 INFO L226 Difference]: Without dead ends: 52 [2023-04-01 09:06:59,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 09:06:59,638 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:06:59,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 94 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:06:59,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-01 09:06:59,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2023-04-01 09:06:59,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 33 states have internal predecessors, (39), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 09:06:59,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2023-04-01 09:06:59,651 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 22 [2023-04-01 09:06:59,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:06:59,651 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2023-04-01 09:06:59,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:06:59,651 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2023-04-01 09:06:59,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 09:06:59,652 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:06:59,652 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:06:59,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 09:06:59,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:06:59,853 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:06:59,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:06:59,854 INFO L85 PathProgramCache]: Analyzing trace with hash -64170914, now seen corresponding path program 4 times [2023-04-01 09:06:59,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:06:59,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074816067] [2023-04-01 09:06:59,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:06:59,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:06:59,873 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:06:59,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843526873] [2023-04-01 09:06:59,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 09:06:59,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:06:59,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:06:59,875 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:06:59,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 09:07:00,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:07:00,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-01 09:07:00,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:07:00,239 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 [2023-04-01 09:07:00,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:07:00,246 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 16 treesize of output 16 [2023-04-01 09:07:00,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-04-01 09:07:00,266 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 16 treesize of output 18 [2023-04-01 09:07:00,300 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 16 treesize of output 18 [2023-04-01 09:07:00,323 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 16 treesize of output 18 [2023-04-01 09:07:00,364 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 21 treesize of output 20 [2023-04-01 09:07:00,390 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 21 treesize of output 20 [2023-04-01 09:07:00,414 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 21 treesize of output 20 [2023-04-01 09:07:00,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 17 treesize of output 9 [2023-04-01 09:07:00,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:07:00,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:07:00,830 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_251 (Array Int Int))) (= (select (select (store |c_#memory_int| c_main_~b~0.base v_ArrVal_251) c_main_~a~0.base) c_main_~a~0.offset) (+ c_~N~0 1))) is different from false [2023-04-01 09:07:00,842 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:00,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2023-04-01 09:07:00,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:07:00,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074816067] [2023-04-01 09:07:00,857 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:07:00,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843526873] [2023-04-01 09:07:00,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843526873] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:07:00,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1896052562] [2023-04-01 09:07:00,858 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:07:00,858 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:07:00,858 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:07:00,859 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:07:00,859 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:07:00,916 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 83 for LOIs [2023-04-01 09:07:02,326 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 102 for LOIs [2023-04-01 09:07:02,368 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 88 for LOIs [2023-04-01 09:07:02,376 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:07:02,381 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:07:03,915 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1746#(and (exists ((|v_old(#length)_BEFORE_CALL_19| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_19| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_19| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_5 Int)) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 1) 0) 48) (not (= v_main_~a~0.base_BEFORE_CALL_5 0)) (= 115 (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 1)) (= 12 (select |v_old(#length)_BEFORE_CALL_19| 3)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_19| 1) (select |v_old(#memory_int)_BEFORE_CALL_19| 2))) (not (= v_main_~a~0.base_BEFORE_CALL_5 1)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_19| 1) |v_old(#valid)_BEFORE_CALL_19|)) (= (select |v_old(#valid)_BEFORE_CALL_19| v_main_~a~0.base_BEFORE_CALL_5) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_19| 1) |v_old(#length)_BEFORE_CALL_19|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 2) 113) (= (select |v_old(#valid)_BEFORE_CALL_19| 0) 0) (not (= v_main_~a~0.base_BEFORE_CALL_5 2)) (= 46 (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 4)) (not (= |v_old(#length)_BEFORE_CALL_19| (select |v_old(#memory_int)_BEFORE_CALL_19| 2))) (= (select |v_old(#valid)_BEFORE_CALL_19| 3) 1) (= (select |v_old(#length)_BEFORE_CALL_19| 1) 2) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 6) 0) (not (= v_main_~a~0.base_BEFORE_CALL_5 |#StackHeapBarrier|)) (= (select |v_old(#valid)_BEFORE_CALL_19| 2) 1) (not (= v_main_~a~0.base_BEFORE_CALL_5 3)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 3) 109) (= 7 (select |v_old(#length)_BEFORE_CALL_19| 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 0) 110) (not (= (+ ~N~0 1) (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_5) 0))) (not (= |v_old(#valid)_BEFORE_CALL_19| (select |v_old(#memory_int)_BEFORE_CALL_19| 2))) (= 1 (select |v_old(#valid)_BEFORE_CALL_19| 1)) (not (= |v_old(#valid)_BEFORE_CALL_19| |v_old(#length)_BEFORE_CALL_19|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 5) 99) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 1) 1) 0))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (< 0 ~N~0) (= |#NULL.base| 0))' at error location [2023-04-01 09:07:03,915 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:07:03,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:07:03,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2023-04-01 09:07:03,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265278765] [2023-04-01 09:07:03,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:07:03,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-01 09:07:03,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:07:03,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-01 09:07:03,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1264, Unknown=1, NotChecked=72, Total=1482 [2023-04-01 09:07:03,917 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 24 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:07:04,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:07:04,998 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2023-04-01 09:07:04,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 09:07:04,999 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2023-04-01 09:07:04,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:07:05,000 INFO L225 Difference]: With dead ends: 80 [2023-04-01 09:07:05,000 INFO L226 Difference]: Without dead ends: 78 [2023-04-01 09:07:05,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=228, Invalid=1937, Unknown=1, NotChecked=90, Total=2256 [2023-04-01 09:07:05,001 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 77 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 09:07:05,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 78 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 381 Invalid, 0 Unknown, 72 Unchecked, 0.5s Time] [2023-04-01 09:07:05,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-04-01 09:07:05,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 53. [2023-04-01 09:07:05,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 42 states have internal predecessors, (51), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 09:07:05,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2023-04-01 09:07:05,018 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 23 [2023-04-01 09:07:05,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:07:05,019 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2023-04-01 09:07:05,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:07:05,019 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2023-04-01 09:07:05,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 09:07:05,020 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:07:05,020 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:07:05,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 09:07:05,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:05,221 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:07:05,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:07:05,222 INFO L85 PathProgramCache]: Analyzing trace with hash -409251036, now seen corresponding path program 1 times [2023-04-01 09:07:05,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:07:05,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114857496] [2023-04-01 09:07:05,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:07:05,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:07:05,237 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:07:05,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1086872605] [2023-04-01 09:07:05,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:07:05,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:05,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:07:05,239 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:07:05,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 09:07:05,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:07:05,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 43 conjunts are in the unsatisfiable core [2023-04-01 09:07:05,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:07:05,370 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 [2023-04-01 09:07:05,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:07:05,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2023-04-01 09:07:05,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 22 treesize of output 22 [2023-04-01 09:07:05,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-04-01 09:07:05,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 09:07:05,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2023-04-01 09:07:05,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 42 [2023-04-01 09:07:05,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 20 [2023-04-01 09:07:05,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:07:05,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:07:16,828 WARN L223 SmtUtils]: Spent 8.39s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 09:07:16,840 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:16,841 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:16,844 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-04-01 09:07:16,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 1 [2023-04-01 09:07:16,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:07:16,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:07:16,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114857496] [2023-04-01 09:07:16,861 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:07:16,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086872605] [2023-04-01 09:07:16,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086872605] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:07:16,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1896077905] [2023-04-01 09:07:16,862 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 09:07:16,862 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:07:16,862 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:07:16,863 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:07:16,863 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:07:16,923 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 83 for LOIs [2023-04-01 09:07:20,217 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 121 for LOIs [2023-04-01 09:07:20,356 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 88 for LOIs [2023-04-01 09:07:20,367 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:07:20,373 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:07:22,594 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2184#(and (exists ((v_main_~a~0.base_BEFORE_CALL_24 Int) (|v_old(#memory_int)_BEFORE_CALL_39| (Array Int (Array Int Int))) (|v_old(#length)_BEFORE_CALL_39| (Array Int Int)) (|v_old(#valid)_BEFORE_CALL_39| (Array Int Int)) (v_main_~i~0_BEFORE_CALL_28 Int) (|v_main_#t~mem13_BEFORE_CALL_26| Int)) (and (= (select |v_old(#valid)_BEFORE_CALL_39| 1) 1) (= 7 (select |v_old(#length)_BEFORE_CALL_39| 2)) (= (select |v_old(#valid)_BEFORE_CALL_39| 3) 1) (= (select |v_old(#valid)_BEFORE_CALL_39| v_main_~a~0.base_BEFORE_CALL_24) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_39| 2) 4) 46) (= (select |v_old(#length)_BEFORE_CALL_39| 1) 2) (< v_main_~i~0_BEFORE_CALL_28 ~N~0) (not (= v_main_~a~0.base_BEFORE_CALL_24 3)) (= 113 (select (select |v_old(#memory_int)_BEFORE_CALL_39| 2) 2)) (not (= |v_old(#valid)_BEFORE_CALL_39| |v_old(#length)_BEFORE_CALL_39|)) (or (and (<= (mod v_main_~i~0_BEFORE_CALL_28 4294967296) 2147483647) (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_24) (* (mod v_main_~i~0_BEFORE_CALL_28 4294967296) 8)) |v_main_#t~mem13_BEFORE_CALL_26|)) (and (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_24) (+ (* (mod v_main_~i~0_BEFORE_CALL_28 4294967296) 8) (- 34359738368))) |v_main_#t~mem13_BEFORE_CALL_26|) (< 2147483647 (mod v_main_~i~0_BEFORE_CALL_28 4294967296)))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_39| 2) 5) 99) (= (select (select |v_old(#memory_int)_BEFORE_CALL_39| 2) 6) 0) (= (select |v_old(#valid)_BEFORE_CALL_39| 2) 1) (not (= (select |v_old(#memory_int)_BEFORE_CALL_39| 1) |v_old(#valid)_BEFORE_CALL_39|)) (not (= v_main_~a~0.base_BEFORE_CALL_24 0)) (not (= (+ (* v_main_~i~0_BEFORE_CALL_28 2) ~N~0 (* v_main_~i~0_BEFORE_CALL_28 v_main_~i~0_BEFORE_CALL_28) 1) |v_main_#t~mem13_BEFORE_CALL_26|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_39| 1) 1) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_39| 1) (select |v_old(#memory_int)_BEFORE_CALL_39| 2))) (= 109 (select (select |v_old(#memory_int)_BEFORE_CALL_39| 2) 3)) (not (= |v_old(#valid)_BEFORE_CALL_39| (select |v_old(#memory_int)_BEFORE_CALL_39| 2))) (= (select |v_old(#valid)_BEFORE_CALL_39| 0) 0) (not (= v_main_~a~0.base_BEFORE_CALL_24 2)) (not (= v_main_~a~0.base_BEFORE_CALL_24 1)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_39| 1) |v_old(#length)_BEFORE_CALL_39|)) (= (select |v_old(#length)_BEFORE_CALL_39| 3) 12) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_39| 2) 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_39| 1) 0) 48) (not (= v_main_~a~0.base_BEFORE_CALL_24 |#StackHeapBarrier|)) (= 115 (select (select |v_old(#memory_int)_BEFORE_CALL_39| 2) 1)) (not (= |v_old(#length)_BEFORE_CALL_39| (select |v_old(#memory_int)_BEFORE_CALL_39| 2))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 09:07:22,594 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:07:22,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:07:22,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2023-04-01 09:07:22,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111247546] [2023-04-01 09:07:22,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:07:22,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 09:07:22,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:07:22,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 09:07:22,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1351, Unknown=3, NotChecked=0, Total=1482 [2023-04-01 09:07:22,596 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 23 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 09:07:24,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 09:07:28,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:07:28,478 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2023-04-01 09:07:28,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 09:07:28,479 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 26 [2023-04-01 09:07:28,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:07:28,480 INFO L225 Difference]: With dead ends: 86 [2023-04-01 09:07:28,480 INFO L226 Difference]: Without dead ends: 77 [2023-04-01 09:07:28,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=248, Invalid=2199, Unknown=3, NotChecked=0, Total=2450 [2023-04-01 09:07:28,481 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 45 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 34 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-01 09:07:28,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 146 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 371 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2023-04-01 09:07:28,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-04-01 09:07:28,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 58. [2023-04-01 09:07:28,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 45 states have internal predecessors, (52), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 09:07:28,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2023-04-01 09:07:28,497 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 26 [2023-04-01 09:07:28,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:07:28,498 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2023-04-01 09:07:28,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 09:07:28,498 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2023-04-01 09:07:28,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 09:07:28,499 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:07:28,499 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:07:28,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 09:07:28,704 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,SelfDestructingSolverStorable7 [2023-04-01 09:07:28,705 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:07:28,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:07:28,705 INFO L85 PathProgramCache]: Analyzing trace with hash 790702430, now seen corresponding path program 5 times [2023-04-01 09:07:28,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:07:28,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64388711] [2023-04-01 09:07:28,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:07:28,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:07:28,730 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:07:28,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1197936797] [2023-04-01 09:07:28,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:07:28,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:28,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:07:28,732 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:07:28,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 09:07:29,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-01 09:07:29,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:07:29,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 09:07:29,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:07:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 09:07:29,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:07:29,628 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 09:07:29,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:07:29,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64388711] [2023-04-01 09:07:29,628 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:07:29,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197936797] [2023-04-01 09:07:29,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197936797] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:07:29,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [292851470] [2023-04-01 09:07:29,629 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:07:29,630 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:07:29,630 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:07:29,630 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:07:29,630 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:07:29,678 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 83 for LOIs [2023-04-01 09:07:31,084 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 102 for LOIs [2023-04-01 09:07:31,140 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 88 for LOIs [2023-04-01 09:07:31,151 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:07:31,156 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:07:32,756 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2628#(and (exists ((|v_old(#memory_int)_BEFORE_CALL_45| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_45| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_27 Int) (|v_old(#length)_BEFORE_CALL_45| (Array Int Int))) (and (= (select |v_old(#valid)_BEFORE_CALL_45| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_45| v_main_~a~0.base_BEFORE_CALL_27) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_45| 2) 6) 0) (not (= |v_old(#length)_BEFORE_CALL_45| (select |v_old(#memory_int)_BEFORE_CALL_45| 2))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_45| 1) 0) 48) (= (select |v_old(#length)_BEFORE_CALL_45| 3) 12) (= (select (select |v_old(#memory_int)_BEFORE_CALL_45| 2) 2) 113) (not (= |v_old(#valid)_BEFORE_CALL_45| |v_old(#length)_BEFORE_CALL_45|)) (not (= v_main_~a~0.base_BEFORE_CALL_27 0)) (= 115 (select (select |v_old(#memory_int)_BEFORE_CALL_45| 2) 1)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_45| 1) |v_old(#length)_BEFORE_CALL_45|)) (not (= |v_old(#valid)_BEFORE_CALL_45| (select |v_old(#memory_int)_BEFORE_CALL_45| 1))) (not (= (select |v_old(#memory_int)_BEFORE_CALL_45| 1) (select |v_old(#memory_int)_BEFORE_CALL_45| 2))) (= 46 (select (select |v_old(#memory_int)_BEFORE_CALL_45| 2) 4)) (not (= v_main_~a~0.base_BEFORE_CALL_27 1)) (not (= v_main_~a~0.base_BEFORE_CALL_27 3)) (= 2 (select |v_old(#length)_BEFORE_CALL_45| 1)) (= 7 (select |v_old(#length)_BEFORE_CALL_45| 2)) (not (= (+ ~N~0 1) (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_27) 0))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_45| 2) 5) 99) (= 109 (select (select |v_old(#memory_int)_BEFORE_CALL_45| 2) 3)) (= (select |v_old(#valid)_BEFORE_CALL_45| 1) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_45| 1) 1) 0) (not (= v_main_~a~0.base_BEFORE_CALL_27 |#StackHeapBarrier|)) (= (select |v_old(#valid)_BEFORE_CALL_45| 3) 1) (not (= v_main_~a~0.base_BEFORE_CALL_27 2)) (not (= |v_old(#valid)_BEFORE_CALL_45| (select |v_old(#memory_int)_BEFORE_CALL_45| 2))) (= (select |v_old(#valid)_BEFORE_CALL_45| 0) 0) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_45| 2) 0)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (< 0 ~N~0) (= |#NULL.base| 0))' at error location [2023-04-01 09:07:32,756 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:07:32,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:07:32,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2023-04-01 09:07:32,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860451037] [2023-04-01 09:07:32,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:07:32,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 09:07:32,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:07:32,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 09:07:32,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2023-04-01 09:07:32,758 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:07:33,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:07:33,145 INFO L93 Difference]: Finished difference Result 104 states and 129 transitions. [2023-04-01 09:07:33,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 09:07:33,146 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2023-04-01 09:07:33,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:07:33,147 INFO L225 Difference]: With dead ends: 104 [2023-04-01 09:07:33,147 INFO L226 Difference]: Without dead ends: 83 [2023-04-01 09:07:33,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=234, Invalid=1488, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 09:07:33,148 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 19 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:07:33,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 84 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:07:33,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-04-01 09:07:33,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2023-04-01 09:07:33,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 50 states have (on average 1.26) internal successors, (63), 54 states have internal predecessors, (63), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 09:07:33,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2023-04-01 09:07:33,170 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 27 [2023-04-01 09:07:33,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:07:33,170 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2023-04-01 09:07:33,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:07:33,170 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2023-04-01 09:07:33,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 09:07:33,171 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:07:33,171 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:07:33,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 09:07:33,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:33,380 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:07:33,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:07:33,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1747420636, now seen corresponding path program 2 times [2023-04-01 09:07:33,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:07:33,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345048288] [2023-04-01 09:07:33,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:07:33,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:07:33,409 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:07:33,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109984512] [2023-04-01 09:07:33,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:07:33,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:33,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:07:33,412 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:07:33,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 09:07:33,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 09:07:33,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:07:33,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 09:07:33,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:07:33,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 09:07:33,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:07:33,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 09:07:33,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:07:33,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345048288] [2023-04-01 09:07:33,609 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:07:33,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109984512] [2023-04-01 09:07:33,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109984512] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:07:33,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1924930500] [2023-04-01 09:07:33,611 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 09:07:33,611 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:07:33,611 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:07:33,611 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:07:33,611 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:07:33,651 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 83 for LOIs [2023-04-01 09:07:36,437 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 121 for LOIs [2023-04-01 09:07:36,553 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 88 for LOIs [2023-04-01 09:07:36,560 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:07:36,565 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:07:38,250 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3128#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (exists ((|v_old(#memory_int)_BEFORE_CALL_65| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_65| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_44 Int) (v_main_~i~0_BEFORE_CALL_48 Int) (|v_main_#t~mem13_BEFORE_CALL_46| Int) (|v_old(#length)_BEFORE_CALL_65| (Array Int Int))) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_65| 2) 4) 46) (= 115 (select (select |v_old(#memory_int)_BEFORE_CALL_65| 2) 1)) (not (= |v_old(#valid)_BEFORE_CALL_65| (select |v_old(#memory_int)_BEFORE_CALL_65| 1))) (= 2 (select |v_old(#length)_BEFORE_CALL_65| 1)) (= 7 (select |v_old(#length)_BEFORE_CALL_65| 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_65| 2) 2) 113) (not (= |v_old(#valid)_BEFORE_CALL_65| |v_old(#length)_BEFORE_CALL_65|)) (= (select |v_old(#valid)_BEFORE_CALL_65| 0) 0) (= (select |v_old(#valid)_BEFORE_CALL_65| 2) 1) (not (= (select |v_old(#memory_int)_BEFORE_CALL_65| 2) |v_old(#length)_BEFORE_CALL_65|)) (not (= v_main_~a~0.base_BEFORE_CALL_44 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_65| 2) 6) 0) (or (and (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_44) (* (mod v_main_~i~0_BEFORE_CALL_48 4294967296) 8)) |v_main_#t~mem13_BEFORE_CALL_46|) (<= (mod v_main_~i~0_BEFORE_CALL_48 4294967296) 2147483647)) (and (< 2147483647 (mod v_main_~i~0_BEFORE_CALL_48 4294967296)) (= |v_main_#t~mem13_BEFORE_CALL_46| (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_44) (+ (* (mod v_main_~i~0_BEFORE_CALL_48 4294967296) 8) (- 34359738368)))))) (not (= v_main_~a~0.base_BEFORE_CALL_44 1)) (= (select |v_old(#valid)_BEFORE_CALL_65| 3) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_65| 2) 5) 99) (< v_main_~i~0_BEFORE_CALL_48 ~N~0) (not (= v_main_~a~0.base_BEFORE_CALL_44 3)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_65| 1) (select |v_old(#memory_int)_BEFORE_CALL_65| 2))) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_65| 2) 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_65| 1) 1) 0) (= (select |v_old(#length)_BEFORE_CALL_65| 3) 12) (not (= (+ (* v_main_~i~0_BEFORE_CALL_48 v_main_~i~0_BEFORE_CALL_48) ~N~0 (* v_main_~i~0_BEFORE_CALL_48 2) 1) |v_main_#t~mem13_BEFORE_CALL_46|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_65| 1) |v_old(#length)_BEFORE_CALL_65|)) (= 109 (select (select |v_old(#memory_int)_BEFORE_CALL_65| 2) 3)) (not (= v_main_~a~0.base_BEFORE_CALL_44 0)) (not (= v_main_~a~0.base_BEFORE_CALL_44 |#StackHeapBarrier|)) (= (select |v_old(#valid)_BEFORE_CALL_65| 1) 1) (not (= |v_old(#valid)_BEFORE_CALL_65| (select |v_old(#memory_int)_BEFORE_CALL_65| 2))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_65| 1) 0) 48) (= (select |v_old(#valid)_BEFORE_CALL_65| v_main_~a~0.base_BEFORE_CALL_44) 0))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 09:07:38,250 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:07:38,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:07:38,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-04-01 09:07:38,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360193838] [2023-04-01 09:07:38,252 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:07:38,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 09:07:38,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:07:38,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 09:07:38,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2023-04-01 09:07:38,254 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 09:07:38,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:07:38,384 INFO L93 Difference]: Finished difference Result 87 states and 102 transitions. [2023-04-01 09:07:38,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 09:07:38,385 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-04-01 09:07:38,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:07:38,385 INFO L225 Difference]: With dead ends: 87 [2023-04-01 09:07:38,385 INFO L226 Difference]: Without dead ends: 72 [2023-04-01 09:07:38,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2023-04-01 09:07:38,386 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:07:38,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 41 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:07:38,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-04-01 09:07:38,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2023-04-01 09:07:38,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 52 states have internal predecessors, (60), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 09:07:38,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2023-04-01 09:07:38,411 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 28 [2023-04-01 09:07:38,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:07:38,411 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2023-04-01 09:07:38,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 09:07:38,412 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2023-04-01 09:07:38,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 09:07:38,412 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:07:38,412 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:07:38,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 09:07:38,613 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,SelfDestructingSolverStorable9 [2023-04-01 09:07:38,614 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:07:38,614 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:07:38,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1641834278, now seen corresponding path program 6 times [2023-04-01 09:07:38,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:07:38,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017793970] [2023-04-01 09:07:38,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:07:38,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:07:38,641 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:07:38,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1475488217] [2023-04-01 09:07:38,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 09:07:38,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:38,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:07:38,642 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:07:38,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 09:07:38,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 09:07:38,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:07:38,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 09:07:38,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:07:38,839 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 09:07:38,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:07:38,923 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 09:07:38,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:07:38,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017793970] [2023-04-01 09:07:38,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:07:38,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475488217] [2023-04-01 09:07:38,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475488217] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:07:38,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1043542966] [2023-04-01 09:07:38,924 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:07:38,925 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:07:38,925 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:07:38,925 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:07:38,925 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:07:38,978 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 83 for LOIs [2023-04-01 09:07:40,132 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 102 for LOIs [2023-04-01 09:07:40,168 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 88 for LOIs [2023-04-01 09:07:40,181 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:07:40,185 INFO L180 IcfgInterpreter]: Interpretation finished