/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-patterns/array24_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 15:08:47,475 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 15:08:47,477 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 15:08:47,507 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 15:08:47,508 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 15:08:47,510 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 15:08:47,516 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 15:08:47,518 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 15:08:47,519 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 15:08:47,523 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 15:08:47,524 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 15:08:47,526 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 15:08:47,526 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 15:08:47,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 15:08:47,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 15:08:47,530 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 15:08:47,531 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 15:08:47,532 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 15:08:47,534 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 15:08:47,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 15:08:47,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 15:08:47,540 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 15:08:47,542 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 15:08:47,543 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 15:08:47,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 15:08:47,552 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 15:08:47,552 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 15:08:47,552 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 15:08:47,553 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 15:08:47,553 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 15:08:47,554 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 15:08:47,554 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 15:08:47,555 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 15:08:47,555 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 15:08:47,556 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 15:08:47,556 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 15:08:47,557 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 15:08:47,557 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 15:08:47,557 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 15:08:47,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 15:08:47,558 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 15:08:47,564 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 15:08:47,592 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 15:08:47,592 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 15:08:47,593 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 15:08:47,593 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 15:08:47,594 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 15:08:47,594 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 15:08:47,594 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 15:08:47,594 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 15:08:47,594 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 15:08:47,594 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 15:08:47,595 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 15:08:47,595 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 15:08:47,595 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 15:08:47,595 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 15:08:47,596 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 15:08:47,596 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 15:08:47,596 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 15:08:47,596 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 15:08:47,596 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 15:08:47,596 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 15:08:47,597 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 15:08:47,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 15:08:47,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 15:08:47,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 15:08:47,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 15:08:47,597 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 15:08:47,597 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 15:08:47,598 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 15:08:47,598 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 15:08:47,598 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 15:08:47,598 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 15:08:47,598 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 15:08:47,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:08:47,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 15:08:47,599 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 15:08:47,599 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 15:08:47,599 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 15:08:47,599 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 15:08:47,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 15:08:47,599 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 15:08:47,599 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 15:08:47,599 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 15:08:47,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 15:08:47,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 15:08:47,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 15:08:47,843 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 15:08:47,844 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 15:08:47,845 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array24_pattern.c [2023-04-02 15:08:48,941 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 15:08:49,146 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 15:08:49,147 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array24_pattern.c [2023-04-02 15:08:49,153 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9bc16057/4f2934983083495e8d72346a0ad39711/FLAG9ad09a24d [2023-04-02 15:08:49,166 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9bc16057/4f2934983083495e8d72346a0ad39711 [2023-04-02 15:08:49,169 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 15:08:49,170 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 15:08:49,173 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 15:08:49,173 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 15:08:49,176 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 15:08:49,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:08:49" (1/1) ... [2023-04-02 15:08:49,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7620410e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:08:49, skipping insertion in model container [2023-04-02 15:08:49,178 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:08:49" (1/1) ... [2023-04-02 15:08:49,183 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 15:08:49,196 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 15:08:49,301 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-patterns/array24_pattern.c[1359,1372] [2023-04-02 15:08:49,319 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:08:49,326 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 15:08:49,336 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-patterns/array24_pattern.c[1359,1372] [2023-04-02 15:08:49,344 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:08:49,355 INFO L208 MainTranslator]: Completed translation [2023-04-02 15:08:49,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:08:49 WrapperNode [2023-04-02 15:08:49,356 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 15:08:49,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 15:08:49,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 15:08:49,357 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 15:08:49,373 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:08:49" (1/1) ... [2023-04-02 15:08:49,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:08:49" (1/1) ... [2023-04-02 15:08:49,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:08:49" (1/1) ... [2023-04-02 15:08:49,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:08:49" (1/1) ... [2023-04-02 15:08:49,385 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:08:49" (1/1) ... [2023-04-02 15:08:49,389 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:08:49" (1/1) ... [2023-04-02 15:08:49,390 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:08:49" (1/1) ... [2023-04-02 15:08:49,391 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:08:49" (1/1) ... [2023-04-02 15:08:49,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 15:08:49,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 15:08:49,394 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 15:08:49,394 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 15:08:49,395 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:08:49" (1/1) ... [2023-04-02 15:08:49,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:08:49,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:08:49,422 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 15:08:49,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 15:08:49,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 15:08:49,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 15:08:49,462 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 15:08:49,462 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 15:08:49,462 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 15:08:49,462 INFO L138 BoogieDeclarations]: Found implementation of procedure outerBoundaryPatternCheck [2023-04-02 15:08:49,464 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 15:08:49,465 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 15:08:49,465 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 15:08:49,465 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 15:08:49,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 15:08:49,465 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 15:08:49,465 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 15:08:49,465 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 15:08:49,465 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2023-04-02 15:08:49,465 INFO L130 BoogieDeclarations]: Found specification of procedure outerBoundaryPatternCheck [2023-04-02 15:08:49,466 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 15:08:49,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 15:08:49,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 15:08:49,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 15:08:49,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 15:08:49,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 15:08:49,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 15:08:49,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 15:08:49,521 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 15:08:49,523 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 15:08:49,732 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 15:08:49,805 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 15:08:49,805 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-04-02 15:08:49,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:08:49 BoogieIcfgContainer [2023-04-02 15:08:49,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 15:08:49,817 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 15:08:49,817 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 15:08:49,820 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 15:08:49,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 03:08:49" (1/3) ... [2023-04-02 15:08:49,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6bc9ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:08:49, skipping insertion in model container [2023-04-02 15:08:49,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:08:49" (2/3) ... [2023-04-02 15:08:49,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6bc9ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:08:49, skipping insertion in model container [2023-04-02 15:08:49,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:08:49" (3/3) ... [2023-04-02 15:08:49,822 INFO L112 eAbstractionObserver]: Analyzing ICFG array24_pattern.c [2023-04-02 15:08:49,837 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 15:08:49,838 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 15:08:49,892 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 15:08:49,897 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;@5409e07a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 15:08:49,897 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 15:08:49,900 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 15:08:49,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-02 15:08:49,906 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:08:49,907 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:08:49,907 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:08:49,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:08:49,910 INFO L85 PathProgramCache]: Analyzing trace with hash -175931375, now seen corresponding path program 1 times [2023-04-02 15:08:49,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:08:49,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534281821] [2023-04-02 15:08:49,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:08:49,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:08:49,999 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:08:50,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643049027] [2023-04-02 15:08:50,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:08:50,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:08:50,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:08:50,009 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:08:50,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 15:08:50,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:08:50,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-02 15:08:50,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:08:50,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:08:50,119 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 15:08:50,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:08:50,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534281821] [2023-04-02 15:08:50,120 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:08:50,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643049027] [2023-04-02 15:08:50,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643049027] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:08:50,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:08:50,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 15:08:50,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751341962] [2023-04-02 15:08:50,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:08:50,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 15:08:50,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:08:50,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 15:08:50,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 15:08:50,180 INFO L87 Difference]: Start difference. First operand has 37 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2023-04-02 15:08:50,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:08:50,214 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2023-04-02 15:08:50,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 15:08:50,216 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 17 [2023-04-02 15:08:50,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:08:50,222 INFO L225 Difference]: With dead ends: 51 [2023-04-02 15:08:50,222 INFO L226 Difference]: Without dead ends: 31 [2023-04-02 15:08:50,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 15:08:50,227 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 15:08:50,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 15:08:50,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-02 15:08:50,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-04-02 15:08:50,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 15:08:50,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2023-04-02 15:08:50,259 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 17 [2023-04-02 15:08:50,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:08:50,260 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2023-04-02 15:08:50,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2023-04-02 15:08:50,261 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2023-04-02 15:08:50,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-02 15:08:50,262 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:08:50,262 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:08:50,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 15:08:50,468 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 [2023-04-02 15:08:50,468 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:08:50,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:08:50,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1897957593, now seen corresponding path program 1 times [2023-04-02 15:08:50,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:08:50,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395224606] [2023-04-02 15:08:50,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:08:50,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:08:50,498 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:08:50,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1373781066] [2023-04-02 15:08:50,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:08:50,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:08:50,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:08:50,501 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:08:50,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 15:08:50,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:08:50,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 15:08:50,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:08:50,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 15:08:50,702 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 15:08:50,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:08:50,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395224606] [2023-04-02 15:08:50,703 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:08:50,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373781066] [2023-04-02 15:08:50,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373781066] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:08:50,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:08:50,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 15:08:50,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580480197] [2023-04-02 15:08:50,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:08:50,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 15:08:50,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:08:50,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 15:08:50,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 15:08:50,708 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 15:08:50,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:08:50,809 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2023-04-02 15:08:50,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 15:08:50,810 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 30 [2023-04-02 15:08:50,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:08:50,811 INFO L225 Difference]: With dead ends: 59 [2023-04-02 15:08:50,811 INFO L226 Difference]: Without dead ends: 37 [2023-04-02 15:08:50,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-02 15:08:50,815 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 34 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:08:50,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 61 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:08:50,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-02 15:08:50,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2023-04-02 15:08:50,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 15:08:50,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2023-04-02 15:08:50,831 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 30 [2023-04-02 15:08:50,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:08:50,831 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2023-04-02 15:08:50,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 15:08:50,832 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2023-04-02 15:08:50,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-02 15:08:50,833 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:08:50,833 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:08:50,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 15:08:51,039 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 [2023-04-02 15:08:51,039 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:08:51,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:08:51,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1879250976, now seen corresponding path program 1 times [2023-04-02 15:08:51,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:08:51,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318362685] [2023-04-02 15:08:51,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:08:51,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:08:51,063 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:08:51,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [143795414] [2023-04-02 15:08:51,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:08:51,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:08:51,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:08:51,072 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:08:51,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 15:08:51,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:08:51,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 15:08:51,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:08:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 15:08:51,187 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 15:08:51,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:08:51,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318362685] [2023-04-02 15:08:51,188 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:08:51,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143795414] [2023-04-02 15:08:51,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143795414] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:08:51,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:08:51,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 15:08:51,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211718736] [2023-04-02 15:08:51,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:08:51,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 15:08:51,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:08:51,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 15:08:51,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 15:08:51,194 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 15:08:51,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:08:51,245 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2023-04-02 15:08:51,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 15:08:51,246 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2023-04-02 15:08:51,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:08:51,248 INFO L225 Difference]: With dead ends: 62 [2023-04-02 15:08:51,248 INFO L226 Difference]: Without dead ends: 37 [2023-04-02 15:08:51,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 15:08:51,252 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 16 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 15:08:51,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 66 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 15:08:51,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-02 15:08:51,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-04-02 15:08:51,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 15:08:51,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2023-04-02 15:08:51,276 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 34 [2023-04-02 15:08:51,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:08:51,277 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2023-04-02 15:08:51,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 15:08:51,277 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2023-04-02 15:08:51,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-02 15:08:51,278 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:08:51,278 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:08:51,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 15:08:51,479 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 [2023-04-02 15:08:51,479 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:08:51,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:08:51,480 INFO L85 PathProgramCache]: Analyzing trace with hash -22273656, now seen corresponding path program 1 times [2023-04-02 15:08:51,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:08:51,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239939866] [2023-04-02 15:08:51,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:08:51,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:08:51,514 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:08:51,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2008786949] [2023-04-02 15:08:51,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:08:51,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:08:51,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:08:51,516 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:08:51,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 15:08:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:08:51,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 15:08:51,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:08:51,664 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 15:08:51,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:08:51,762 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 15:08:51,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:08:51,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239939866] [2023-04-02 15:08:51,762 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:08:51,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008786949] [2023-04-02 15:08:51,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008786949] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:08:51,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [689928519] [2023-04-02 15:08:51,780 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 15:08:51,780 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:08:51,783 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:08:51,788 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:08:51,791 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:08:51,892 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:08:52,905 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2023-04-02 15:08:52,911 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-04-02 15:08:52,912 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:08:52,917 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 11 for LOIs [2023-04-02 15:08:52,921 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:08:54,658 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '941#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-04-02 15:08:54,659 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:08:54,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:08:54,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-04-02 15:08:54,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353801737] [2023-04-02 15:08:54,659 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:08:54,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 15:08:54,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:08:54,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 15:08:54,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1038, Unknown=2, NotChecked=0, Total=1190 [2023-04-02 15:08:54,661 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 9 states, 7 states have (on average 4.142857142857143) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-02 15:08:54,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:08:54,742 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2023-04-02 15:08:54,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 15:08:54,743 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 4.142857142857143) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 36 [2023-04-02 15:08:54,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:08:54,744 INFO L225 Difference]: With dead ends: 66 [2023-04-02 15:08:54,744 INFO L226 Difference]: Without dead ends: 39 [2023-04-02 15:08:54,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=155, Invalid=1103, Unknown=2, NotChecked=0, Total=1260 [2023-04-02 15:08:54,745 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 29 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:08:54,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 91 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:08:54,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-02 15:08:54,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-04-02 15:08:54,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 15:08:54,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2023-04-02 15:08:54,751 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 36 [2023-04-02 15:08:54,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:08:54,751 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2023-04-02 15:08:54,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 4.142857142857143) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-02 15:08:54,752 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2023-04-02 15:08:54,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-02 15:08:54,752 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:08:54,753 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:08:54,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 15:08:54,961 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 [2023-04-02 15:08:54,961 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:08:54,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:08:54,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1170949024, now seen corresponding path program 2 times [2023-04-02 15:08:54,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:08:54,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373479410] [2023-04-02 15:08:54,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:08:54,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:08:54,979 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:08:54,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61244764] [2023-04-02 15:08:54,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 15:08:54,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:08:54,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:08:54,990 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:08:55,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 15:08:55,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 15:08:55,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:08:55,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-02 15:08:55,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:08:55,159 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 15:08:55,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:08:55,428 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 15:08:55,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:08:55,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373479410] [2023-04-02 15:08:55,429 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:08:55,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61244764] [2023-04-02 15:08:55,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61244764] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:08:55,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1841960430] [2023-04-02 15:08:55,436 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 15:08:55,436 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:08:55,437 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:08:55,437 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:08:55,437 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:08:55,471 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:08:56,035 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2023-04-02 15:08:56,039 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-04-02 15:08:56,041 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:08:56,044 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 11 for LOIs [2023-04-02 15:08:56,047 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:08:57,668 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1381#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-04-02 15:08:57,668 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:08:57,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:08:57,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2023-04-02 15:08:57,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655512109] [2023-04-02 15:08:57,669 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:08:57,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 15:08:57,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:08:57,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 15:08:57,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1496, Unknown=2, NotChecked=0, Total=1722 [2023-04-02 15:08:57,671 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 16 states, 11 states have (on average 3.727272727272727) internal successors, (41), 14 states have internal predecessors, (41), 4 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2023-04-02 15:08:57,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:08:57,837 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2023-04-02 15:08:57,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 15:08:57,837 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 11 states have (on average 3.727272727272727) internal successors, (41), 14 states have internal predecessors, (41), 4 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) Word has length 38 [2023-04-02 15:08:57,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:08:57,840 INFO L225 Difference]: With dead ends: 78 [2023-04-02 15:08:57,840 INFO L226 Difference]: Without dead ends: 53 [2023-04-02 15:08:57,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=235, Invalid=1569, Unknown=2, NotChecked=0, Total=1806 [2023-04-02 15:08:57,842 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 54 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:08:57,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 86 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:08:57,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-04-02 15:08:57,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2023-04-02 15:08:57,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 15:08:57,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2023-04-02 15:08:57,853 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 38 [2023-04-02 15:08:57,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:08:57,853 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2023-04-02 15:08:57,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 11 states have (on average 3.727272727272727) internal successors, (41), 14 states have internal predecessors, (41), 4 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2023-04-02 15:08:57,853 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2023-04-02 15:08:57,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-02 15:08:57,855 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:08:57,856 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:08:57,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 15:08:58,061 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 [2023-04-02 15:08:58,062 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:08:58,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:08:58,062 INFO L85 PathProgramCache]: Analyzing trace with hash 263687193, now seen corresponding path program 3 times [2023-04-02 15:08:58,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:08:58,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169767917] [2023-04-02 15:08:58,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:08:58,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:08:58,075 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:08:58,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1037320493] [2023-04-02 15:08:58,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 15:08:58,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:08:58,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:08:58,077 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:08:58,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 15:08:58,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 15:08:58,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:08:58,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 72 conjunts are in the unsatisfiable core [2023-04-02 15:08:58,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:08:58,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-04-02 15:08:58,396 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 19 treesize of output 18 [2023-04-02 15:08:58,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:08:58,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:08:58,500 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 15:08:58,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2023-04-02 15:08:58,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:08:58,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:08:58,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:08:58,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:08:58,542 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 15:08:58,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-04-02 15:08:58,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:08:58,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:08:58,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:08:58,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:08:59,013 INFO L321 Elim1Store]: treesize reduction 156, result has 18.3 percent of original size [2023-04-02 15:08:59,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 66 treesize of output 62 [2023-04-02 15:08:59,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:08:59,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:08:59,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:08:59,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:08:59,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 15:08:59,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 13 [2023-04-02 15:08:59,450 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 15:08:59,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:09:20,816 WARN L223 SmtUtils]: Spent 16.32s on a formula simplification. DAG size of input: 51 DAG size of output: 49 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:09:22,079 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 462 treesize of output 446 [2023-04-02 15:09:22,143 INFO L321 Elim1Store]: treesize reduction 27, result has 22.9 percent of original size [2023-04-02 15:09:22,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3119680 treesize of output 2964041 [2023-04-02 15:09:38,505 WARN L223 SmtUtils]: Spent 16.36s on a formula simplification. DAG size of input: 660 DAG size of output: 886 (called from [L 809] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-04-02 15:09:43,811 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 15:09:43,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:09:43,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169767917] [2023-04-02 15:09:43,811 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:09:43,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037320493] [2023-04-02 15:09:43,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037320493] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:09:43,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [483294742] [2023-04-02 15:09:43,813 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 15:09:43,813 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:09:43,814 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:09:43,814 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:09:43,814 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:09:43,834 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:09:44,253 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2023-04-02 15:09:44,258 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-04-02 15:09:44,258 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:09:44,262 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 11 for LOIs [2023-04-02 15:09:44,263 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:09:46,815 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1937#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-04-02 15:09:46,815 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:09:46,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:09:46,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2023-04-02 15:09:46,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030219099] [2023-04-02 15:09:46,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:09:46,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-04-02 15:09:46,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:09:46,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-04-02 15:09:46,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=4361, Unknown=3, NotChecked=0, Total=4830 [2023-04-02 15:09:46,819 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 44 states, 42 states have (on average 1.5) internal successors, (63), 42 states have internal predecessors, (63), 7 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-02 15:09:50,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-04-02 15:10:03,229 WARN L223 SmtUtils]: Spent 8.21s on a formula simplification that was a NOOP. DAG size: 83 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:10:05,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-04-02 15:10:06,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-04-02 15:10:08,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-04-02 15:10:27,331 WARN L223 SmtUtils]: Spent 8.13s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:10:27,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:10:27,393 INFO L93 Difference]: Finished difference Result 176 states and 230 transitions. [2023-04-02 15:10:27,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-04-02 15:10:27,393 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 1.5) internal successors, (63), 42 states have internal predecessors, (63), 7 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) Word has length 46 [2023-04-02 15:10:27,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:10:27,395 INFO L225 Difference]: With dead ends: 176 [2023-04-02 15:10:27,395 INFO L226 Difference]: Without dead ends: 168 [2023-04-02 15:10:27,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4623 ImplicationChecksByTransitivity, 52.3s TimeCoverageRelationStatistics Valid=1552, Invalid=12251, Unknown=3, NotChecked=0, Total=13806 [2023-04-02 15:10:27,399 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 223 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 1450 mSolverCounterSat, 148 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 1601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1450 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2023-04-02 15:10:27,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 586 Invalid, 1601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1450 Invalid, 3 Unknown, 0 Unchecked, 13.7s Time] [2023-04-02 15:10:27,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-04-02 15:10:27,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 108. [2023-04-02 15:10:27,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 81 states have (on average 1.308641975308642) internal successors, (106), 82 states have internal predecessors, (106), 19 states have call successors, (19), 9 states have call predecessors, (19), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2023-04-02 15:10:27,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 142 transitions. [2023-04-02 15:10:27,452 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 142 transitions. Word has length 46 [2023-04-02 15:10:27,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:10:27,453 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 142 transitions. [2023-04-02 15:10:27,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 1.5) internal successors, (63), 42 states have internal predecessors, (63), 7 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2023-04-02 15:10:27,453 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 142 transitions. [2023-04-02 15:10:27,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-02 15:10:27,459 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:10:27,459 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:10:27,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 15:10:27,666 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 [2023-04-02 15:10:27,666 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:10:27,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:10:27,667 INFO L85 PathProgramCache]: Analyzing trace with hash -764162867, now seen corresponding path program 4 times [2023-04-02 15:10:27,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:10:27,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219839431] [2023-04-02 15:10:27,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:10:27,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:10:27,692 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:10:27,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [615265295] [2023-04-02 15:10:27,692 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 15:10:27,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:10:27,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:10:27,696 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:10:27,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 15:10:27,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:10:27,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 15:10:27,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:10:27,841 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 15:10:27,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:10:27,899 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 15:10:27,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:10:27,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219839431] [2023-04-02 15:10:27,900 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:10:27,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615265295] [2023-04-02 15:10:27,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615265295] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:10:27,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [972789790] [2023-04-02 15:10:27,902 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 15:10:27,902 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:10:27,902 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:10:27,902 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:10:27,902 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:10:27,920 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:10:28,334 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2023-04-02 15:10:28,338 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-04-02 15:10:28,338 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:10:28,342 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 11 for LOIs [2023-04-02 15:10:28,344 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:10:29,818 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2833#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-04-02 15:10:29,818 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:10:29,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:10:29,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-04-02 15:10:29,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218678936] [2023-04-02 15:10:29,819 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:10:29,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 15:10:29,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:10:29,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 15:10:29,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1205, Unknown=2, NotChecked=0, Total=1406 [2023-04-02 15:10:29,820 INFO L87 Difference]: Start difference. First operand 108 states and 142 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 15:10:30,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:10:30,056 INFO L93 Difference]: Finished difference Result 232 states and 307 transitions. [2023-04-02 15:10:30,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 15:10:30,056 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 47 [2023-04-02 15:10:30,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:10:30,058 INFO L225 Difference]: With dead ends: 232 [2023-04-02 15:10:30,058 INFO L226 Difference]: Without dead ends: 159 [2023-04-02 15:10:30,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 100 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=238, Invalid=1482, Unknown=2, NotChecked=0, Total=1722 [2023-04-02 15:10:30,061 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 100 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:10:30,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 127 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:10:30,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-04-02 15:10:30,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 129. [2023-04-02 15:10:30,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 96 states have (on average 1.28125) internal successors, (123), 97 states have internal predecessors, (123), 23 states have call successors, (23), 11 states have call predecessors, (23), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2023-04-02 15:10:30,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 167 transitions. [2023-04-02 15:10:30,131 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 167 transitions. Word has length 47 [2023-04-02 15:10:30,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:10:30,132 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 167 transitions. [2023-04-02 15:10:30,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 15:10:30,132 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 167 transitions. [2023-04-02 15:10:30,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-02 15:10:30,134 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:10:30,134 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:10:30,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 15:10:30,337 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 [2023-04-02 15:10:30,337 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:10:30,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:10:30,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1140155977, now seen corresponding path program 5 times [2023-04-02 15:10:30,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:10:30,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404902887] [2023-04-02 15:10:30,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:10:30,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:10:30,356 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:10:30,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941137342] [2023-04-02 15:10:30,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 15:10:30,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:10:30,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:10:30,358 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:10:30,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 15:10:30,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-04-02 15:10:30,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:10:30,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-02 15:10:30,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:10:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-04-02 15:10:30,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:10:30,636 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-04-02 15:10:30,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:10:30,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404902887] [2023-04-02 15:10:30,637 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:10:30,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941137342] [2023-04-02 15:10:30,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941137342] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:10:30,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [941616445] [2023-04-02 15:10:30,640 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 15:10:30,640 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:10:30,641 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:10:30,641 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:10:30,641 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:10:30,658 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:10:31,068 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2023-04-02 15:10:31,072 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-04-02 15:10:31,072 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:10:31,075 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 11 for LOIs [2023-04-02 15:10:31,078 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:10:32,573 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3774#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-04-02 15:10:32,573 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:10:32,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:10:32,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-04-02 15:10:32,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358893163] [2023-04-02 15:10:32,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:10:32,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 15:10:32,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:10:32,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 15:10:32,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1164, Unknown=2, NotChecked=0, Total=1332 [2023-04-02 15:10:32,575 INFO L87 Difference]: Start difference. First operand 129 states and 167 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 15:10:32,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:10:32,939 INFO L93 Difference]: Finished difference Result 177 states and 219 transitions. [2023-04-02 15:10:32,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-02 15:10:32,939 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2023-04-02 15:10:32,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:10:32,940 INFO L225 Difference]: With dead ends: 177 [2023-04-02 15:10:32,940 INFO L226 Difference]: Without dead ends: 172 [2023-04-02 15:10:32,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 104 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=357, Invalid=2397, Unknown=2, NotChecked=0, Total=2756 [2023-04-02 15:10:32,941 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 57 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:10:32,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 127 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:10:32,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-04-02 15:10:32,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 121. [2023-04-02 15:10:32,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 90 states have (on average 1.2555555555555555) internal successors, (113), 91 states have internal predecessors, (113), 20 states have call successors, (20), 12 states have call predecessors, (20), 10 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-04-02 15:10:32,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 151 transitions. [2023-04-02 15:10:32,988 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 151 transitions. Word has length 48 [2023-04-02 15:10:32,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:10:32,988 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 151 transitions. [2023-04-02 15:10:32,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 15:10:32,988 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 151 transitions. [2023-04-02 15:10:32,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-02 15:10:32,989 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:10:32,989 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:10:32,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 15:10:33,192 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 [2023-04-02 15:10:33,192 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:10:33,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:10:33,193 INFO L85 PathProgramCache]: Analyzing trace with hash 810429702, now seen corresponding path program 1 times [2023-04-02 15:10:33,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:10:33,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436901595] [2023-04-02 15:10:33,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:10:33,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:10:33,201 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:10:33,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801393923] [2023-04-02 15:10:33,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:10:33,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:10:33,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:10:33,203 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:10:33,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 15:10:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:10:33,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-02 15:10:33,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:10:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-04-02 15:10:33,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:10:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-02 15:10:33,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:10:33,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436901595] [2023-04-02 15:10:33,709 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:10:33,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801393923] [2023-04-02 15:10:33,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801393923] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:10:33,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [243510108] [2023-04-02 15:10:33,711 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-04-02 15:10:33,711 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:10:33,711 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:10:33,711 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:10:33,711 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:10:33,726 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:10:34,310 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2023-04-02 15:10:34,314 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-04-02 15:10:34,315 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:10:34,318 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 17 for LOIs [2023-04-02 15:10:34,322 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:10:36,385 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4661#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= 2 ~ARR_SIZE~0))' at error location [2023-04-02 15:10:36,385 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:10:36,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:10:36,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2023-04-02 15:10:36,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950735341] [2023-04-02 15:10:36,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:10:36,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-02 15:10:36,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:10:36,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-02 15:10:36,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=2072, Unknown=2, NotChecked=0, Total=2352 [2023-04-02 15:10:36,387 INFO L87 Difference]: Start difference. First operand 121 states and 151 transitions. Second operand has 21 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 17 states have internal predecessors, (45), 6 states have call successors, (12), 3 states have call predecessors, (12), 8 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2023-04-02 15:10:36,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:10:36,946 INFO L93 Difference]: Finished difference Result 172 states and 204 transitions. [2023-04-02 15:10:36,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-02 15:10:36,946 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 17 states have internal predecessors, (45), 6 states have call successors, (12), 3 states have call predecessors, (12), 8 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) Word has length 50 [2023-04-02 15:10:36,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:10:36,947 INFO L225 Difference]: With dead ends: 172 [2023-04-02 15:10:36,947 INFO L226 Difference]: Without dead ends: 121 [2023-04-02 15:10:36,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=431, Invalid=3227, Unknown=2, NotChecked=0, Total=3660 [2023-04-02 15:10:36,949 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 105 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 15:10:36,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 209 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 15:10:36,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-04-02 15:10:36,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 87. [2023-04-02 15:10:36,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 69 states have internal predecessors, (86), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-02 15:10:36,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2023-04-02 15:10:36,994 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 50 [2023-04-02 15:10:36,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:10:36,995 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2023-04-02 15:10:36,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 17 states have internal predecessors, (45), 6 states have call successors, (12), 3 states have call predecessors, (12), 8 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2023-04-02 15:10:36,995 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2023-04-02 15:10:36,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-02 15:10:36,995 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:10:36,997 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:10:37,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 15:10:37,203 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 [2023-04-02 15:10:37,203 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:10:37,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:10:37,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1244463793, now seen corresponding path program 6 times [2023-04-02 15:10:37,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:10:37,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902550175] [2023-04-02 15:10:37,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:10:37,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:10:37,226 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:10:37,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1216708142] [2023-04-02 15:10:37,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 15:10:37,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:10:37,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:10:37,230 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:10:37,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 15:10:37,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 15:10:37,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:10:37,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 15:10:37,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:10:37,379 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 39 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 15:10:37,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:10:37,445 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 35 proven. 12 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-04-02 15:10:37,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:10:37,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902550175] [2023-04-02 15:10:37,446 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:10:37,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216708142] [2023-04-02 15:10:37,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216708142] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:10:37,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [735967692] [2023-04-02 15:10:37,447 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 15:10:37,447 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:10:37,448 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:10:37,448 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:10:37,448 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:10:37,470 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:10:37,885 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2023-04-02 15:10:37,888 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-04-02 15:10:37,889 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:10:37,892 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 11 for LOIs [2023-04-02 15:10:37,894 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:10:39,282 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5468#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-04-02 15:10:39,283 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:10:39,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:10:39,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-04-02 15:10:39,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416668163] [2023-04-02 15:10:39,283 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:10:39,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 15:10:39,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:10:39,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 15:10:39,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1212, Unknown=2, NotChecked=0, Total=1406 [2023-04-02 15:10:39,285 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 15:10:39,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:10:39,549 INFO L93 Difference]: Finished difference Result 106 states and 124 transitions. [2023-04-02 15:10:39,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-02 15:10:39,549 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2023-04-02 15:10:39,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:10:39,550 INFO L225 Difference]: With dead ends: 106 [2023-04-02 15:10:39,550 INFO L226 Difference]: Without dead ends: 70 [2023-04-02 15:10:39,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=304, Invalid=2046, Unknown=2, NotChecked=0, Total=2352 [2023-04-02 15:10:39,551 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 64 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:10:39,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 127 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:10:39,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-04-02 15:10:39,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2023-04-02 15:10:39,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 52 states have (on average 1.25) internal successors, (65), 52 states have internal predecessors, (65), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 15:10:39,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2023-04-02 15:10:39,586 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 50 [2023-04-02 15:10:39,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:10:39,586 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2023-04-02 15:10:39,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 15:10:39,586 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2023-04-02 15:10:39,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-02 15:10:39,587 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:10:39,587 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:10:39,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 15:10:39,789 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 [2023-04-02 15:10:39,789 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:10:39,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:10:39,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1424232783, now seen corresponding path program 7 times [2023-04-02 15:10:39,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:10:39,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260575522] [2023-04-02 15:10:39,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:10:39,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:10:39,799 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:10:39,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1819608951] [2023-04-02 15:10:39,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 15:10:39,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:10:39,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:10:39,800 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:10:39,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 15:10:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:10:39,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 15:10:39,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:10:39,928 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-04-02 15:10:39,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:10:39,985 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-04-02 15:10:39,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:10:39,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260575522] [2023-04-02 15:10:39,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:10:39,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819608951] [2023-04-02 15:10:39,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819608951] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:10:39,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1937592387] [2023-04-02 15:10:39,986 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 15:10:39,986 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:10:39,987 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:10:39,987 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:10:39,987 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:10:40,007 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:10:40,414 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2023-04-02 15:10:40,417 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-04-02 15:10:40,417 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:10:40,420 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 11 for LOIs [2023-04-02 15:10:40,423 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:10:41,888 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6141#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-04-02 15:10:41,888 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:10:41,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:10:41,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-04-02 15:10:41,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59266873] [2023-04-02 15:10:41,888 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:10:41,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-02 15:10:41,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:10:41,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-02 15:10:41,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1459, Unknown=2, NotChecked=0, Total=1640 [2023-04-02 15:10:41,890 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 15:10:42,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:10:42,132 INFO L93 Difference]: Finished difference Result 127 states and 157 transitions. [2023-04-02 15:10:42,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-02 15:10:42,132 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2023-04-02 15:10:42,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:10:42,133 INFO L225 Difference]: With dead ends: 127 [2023-04-02 15:10:42,133 INFO L226 Difference]: Without dead ends: 82 [2023-04-02 15:10:42,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=257, Invalid=1997, Unknown=2, NotChecked=0, Total=2256 [2023-04-02 15:10:42,134 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 21 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:10:42,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 190 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:10:42,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-04-02 15:10:42,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 70. [2023-04-02 15:10:42,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 15:10:42,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2023-04-02 15:10:42,162 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 52 [2023-04-02 15:10:42,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:10:42,162 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2023-04-02 15:10:42,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-02 15:10:42,162 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2023-04-02 15:10:42,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-02 15:10:42,162 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:10:42,163 INFO L195 NwaCegarLoop]: trace histogram [9, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:10:42,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-02 15:10:42,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-02 15:10:42,364 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:10:42,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:10:42,364 INFO L85 PathProgramCache]: Analyzing trace with hash 706908750, now seen corresponding path program 8 times [2023-04-02 15:10:42,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:10:42,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145313610] [2023-04-02 15:10:42,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:10:42,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:10:42,373 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:10:42,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [211758660] [2023-04-02 15:10:42,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 15:10:42,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:10:42,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:10:42,374 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:10:42,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-02 15:10:42,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-02 15:10:42,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:10:42,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 15:10:42,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:10:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-02 15:10:42,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:10:42,572 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-02 15:10:42,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:10:42,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145313610] [2023-04-02 15:10:42,573 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:10:42,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211758660] [2023-04-02 15:10:42,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211758660] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:10:42,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2089544575] [2023-04-02 15:10:42,574 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 15:10:42,574 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:10:42,575 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:10:42,575 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:10:42,575 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:10:42,591 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:10:42,971 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2023-04-02 15:10:42,975 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-04-02 15:10:42,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:10:42,979 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 11 for LOIs [2023-04-02 15:10:42,981 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:10:44,397 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6886#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-04-02 15:10:44,397 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:10:44,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:10:44,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2023-04-02 15:10:44,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549274532] [2023-04-02 15:10:44,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:10:44,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 15:10:44,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:10:44,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 15:10:44,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1158, Unknown=2, NotChecked=0, Total=1332 [2023-04-02 15:10:44,399 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 15:10:44,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:10:44,567 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2023-04-02 15:10:44,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 15:10:44,567 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 57 [2023-04-02 15:10:44,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:10:44,568 INFO L225 Difference]: With dead ends: 78 [2023-04-02 15:10:44,568 INFO L226 Difference]: Without dead ends: 61 [2023-04-02 15:10:44,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 138 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=228, Invalid=1576, Unknown=2, NotChecked=0, Total=1806 [2023-04-02 15:10:44,569 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 47 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:10:44,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 166 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:10:44,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-04-02 15:10:44,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-04-02 15:10:44,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 15:10:44,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2023-04-02 15:10:44,590 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 57 [2023-04-02 15:10:44,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:10:44,591 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2023-04-02 15:10:44,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 15:10:44,591 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2023-04-02 15:10:44,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-02 15:10:44,591 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:10:44,591 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:10:44,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-02 15:10:44,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 15:10:44,797 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:10:44,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:10:44,797 INFO L85 PathProgramCache]: Analyzing trace with hash 2140818984, now seen corresponding path program 9 times [2023-04-02 15:10:44,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:10:44,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748470687] [2023-04-02 15:10:44,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:10:44,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:10:44,806 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:10:44,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48649729] [2023-04-02 15:10:44,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 15:10:44,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:10:44,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:10:44,808 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:10:44,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-02 15:10:45,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 15:10:45,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:10:45,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 130 conjunts are in the unsatisfiable core [2023-04-02 15:10:45,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:10:45,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-04-02 15:10:45,324 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 19 treesize of output 18 [2023-04-02 15:10:45,364 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 15:10:45,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-04-02 15:10:45,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,457 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 15:10:45,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 40 [2023-04-02 15:10:45,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,504 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 15:10:45,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 54 [2023-04-02 15:10:45,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,564 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 15:10:45,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2023-04-02 15:10:45,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,715 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 15:10:45,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2023-04-02 15:10:45,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,787 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 15:10:45,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 77 treesize of output 94 [2023-04-02 15:10:45,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:45,908 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 15:10:45,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 88 treesize of output 108 [2023-04-02 15:10:46,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:46,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:46,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:46,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:46,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:46,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:46,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:46,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:46,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:46,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:46,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:46,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:46,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:46,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:46,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:46,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:46,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:46,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:46,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:46,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:46,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:46,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:46,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:46,889 INFO L321 Elim1Store]: treesize reduction 386, result has 17.9 percent of original size [2023-04-02 15:10:46,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 36 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 54 case distinctions, treesize of input 115 treesize of output 126 [2023-04-02 15:10:47,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:47,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:47,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:47,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:47,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:47,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:47,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:47,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:47,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:47,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:47,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:47,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:47,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:47,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:47,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:47,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:47,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:47,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:47,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:47,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:47,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:47,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:47,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:10:47,894 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 15:10:47,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 36 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 84 treesize of output 28 [2023-04-02 15:10:47,969 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 4 proven. 144 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 15:10:47,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:11:14,113 WARN L223 SmtUtils]: Spent 16.78s on a formula simplification. DAG size of input: 68 DAG size of output: 66 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:11:23,342 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 2114 treesize of output 2078 [2023-04-02 15:11:30,747 WARN L223 SmtUtils]: Spent 5.71s on a formula simplification. DAG size of input: 90 DAG size of output: 75 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-04-02 15:11:30,748 INFO L321 Elim1Store]: treesize reduction 42, result has 78.9 percent of original size [2023-04-02 15:11:30,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 6482733465984159118 treesize of output 6482733465984159275